Patent Description:
Internal combustion engines, such as those used in vehicles, combust a chemical fuel mixed with oxygen, the oxygen being present in air drawn in through an air intake. Typically, chemical fuels used in internal combustion engines comprise hydrocarbons, and the emissions from such internal combustion engines are known to be detrimental to the environment. Further, internal combustion engines are inefficient.

It would therefore be desirable to provide an alternative system.

<CIT> relates to an oxyhydrogen generator for a self-contained eco-energy house. Water is decomposed by electrolytic and photolytic processes running in parallel in the oxyhydrogen generator. The oxyhydrogen generator has an automatic control and regulation system for the production of an oxyhydrogen mixture aimed at maximising the amount of oxyhydrogen generated.

<CIT> relates to an electrolyzer cell for disassociating water into hydrogen and oxygen. The water entering the electrolyzer cell is air-cooling and/or liquid-cooling and if the temperature of the stream of oxygen and water exiting the electrolyzer cell is too high operation of the electrolyzer cell is suspended.

<CIT> relates to a security control system for an oxyhydrogen fuel producing apparatus. The security control system includes a temperature control device which actuates a fan to cool the electrolyte when its temperature exceeds <NUM> until its temperature is reduced to <NUM> and cuts off electric power to the oxyhydrogen fuel producing apparatus if the temperature of the electrolyte exceeds <NUM> even when the fan is working.

<CIT> relates to an electrolytic gas producer apparatus for producing mixed hydrogen and oxygen gases from water for use as a fuel. The apparatus comprises a plurality of cells each with its own power supply, electrodes and collection means. Current/voltage regimes for each cell may be at least in part controlled in response to temperature, back pressure or the like associated with each cell.

According to various embodiments of the invention there is provided a method for control of an oxyhydrogen gas generator in an oxyhydrogen gas generator system, an oxyhydrogen gas generator control system for control of an oxyhydrogen gas generator in an oxyhydrogen gas generator system, and a computer program according to the appended claims.

For a better understanding of various examples that are useful for understanding the brief description, reference will now be made by way of example only to the accompanying drawings in which:.

<FIG> illustrates a schematic diagram of a system <NUM> including an oxyhydrogen gas generator <NUM>, an oxyhydrogen gas generator control system <NUM>, one or more measurement devices <NUM> and a first switch <NUM>.

The oxyhydrogen gas generator control system <NUM> comprises a controller <NUM> configured to receive output <NUM> from one or more measurement devices <NUM>. The received output <NUM> is dependent on the measurement of one or more parameters associated with the oxyhydrogen gas generator system <NUM>. The controller <NUM> is further configured to control a first switch <NUM>, to control the operation of the oxyhydrogen gas generator <NUM>, dependent on the value of the one or more measured parameters, the first switch <NUM> having a first state and a second state.

The parameters may comprise physical parameters relating to the oxyhydrogen gas generator system <NUM>, such as electrical power and temperature, or relating to a fluid supplied to the oxyhydrogen gas generator system <NUM>, such as temperature, level and flow.

The implementation of the controller <NUM> can be in hardware alone (for example, a circuit, a processor and so on), have certain aspects in software including firmware alone or can be a combination of hardware and software (including firmware). <FIG> illustrates one form of the controller <NUM>.

The controller <NUM> may be implemented using instructions that enable hardware functionality, for example, by using executable computer program instructions in a general-purpose or special-purpose processor <NUM> that may be stored on a computer readable storage medium <NUM> (disk, memory etc) to be executed by such a processor <NUM>.

The memory <NUM> stores a computer program <NUM> comprising computer program instructions (computer program code) that controls the operation of the oxyhydrogen gas generator control system <NUM> when loaded into the processor <NUM>. The computer program instructions, of the computer program <NUM>, provide the logic and routines that enables the oxyhydrogen gas generator control system <NUM> to perform the method illustrated in <FIG>. The processor <NUM> by reading the memory <NUM> is able to load and execute the computer program <NUM>.

The computer program <NUM> may arrive at the oxyhydrogen gas generator control system <NUM> via any suitable delivery mechanism <NUM>. The delivery mechanism <NUM> may be, for example, a non-transitory computer-readable storage medium, a computer program product, a memory device, a record medium such as a compact disc read-only memory (CD-ROM) or digital versatile disc (DVD), an article of manufacture that tangibly embodies the computer program <NUM>. The delivery mechanism <NUM> may be a signal configured to reliably transfer the computer program <NUM>. The oxyhydrogen gas generator control system <NUM> may propagate or transmit the computer program <NUM> as a computer data signal.

Although the memory <NUM> is illustrated as a single component it may be implemented as one or more separate components some or all of which may be integrated/removable and/or may provide permanent/semi-permanent/ dynamic/cached storage.

Although the processor <NUM> is illustrated as a single component it may be implemented as one or more separate components some or all of which may be integrated/removable.

References to 'computer-readable storage medium', 'computer program product', `tangibly embodied computer program' etc. or a `controller', 'computer', 'processor' etc. should be understood to encompass not only computers having different architectures such as single /multi- processor architectures and sequential (Von Neumann)/parallel architectures but also specialized circuits such as field-programmable gate arrays (FPGA), application specific circuits (ASIC), signal processing devices and other processing circuitry.

As used in this application, the term 'circuitry' refers to all of the following:.

This definition of 'circuitry' applies to all uses of this term in this application, including in any claims. The term "circuitry" would also cover, for example and if applicable to the particular claim element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or other network device.

In more detail, <FIG> illustrates an oxyhydrogen gas generator control system <NUM> for controlling an oxyhydrogen gas generator <NUM> in an oxyhydrogen gas generator system <NUM> according to various embodiments of the invention. The oxyhydrogen gas generator control system <NUM> may be comprised in an oxyhydrogen gas generator system <NUM>.

The first switch <NUM>, which the controller <NUM> is configured to control, and which may form part of the oxyhydrogen gas generator control system <NUM> or be separate thereto, may be an electrically controllable switch, such as a relay. The first switch <NUM> may be, for example, a single pole, single throw switch or relay. The states of the first switch <NUM> may define a closed state and an open state. When the first switch <NUM> is of a single pole, single throw configuration, the first switch <NUM> has one contact with a closed state and an open state.

Alternatively the first switch <NUM> may be a single pole, double throw switch or relay. When the first switch <NUM> is of a single pole, double throw configuration, the first switch <NUM> has two contacts, a first contact and a second contact, each with a closed state and an open state. The first contact is equivalent to the one contact in the single pole, single throw configuration. In the single pole, double throw configuration, when one contact is closed, the other contact is open and vice-versa.

For example, when the first contact is in a closed state the second contact is in an open state and when the first contact is in an open state the second contact is in a closed state. The one contact of the single pole, single throw configuration and the first contact of the single pole, double throw configuration may operate as will be described below, wherein the described first state of the one contact in the single pole, single throw switch configuration is equivalent to the first contact of the single pole, double throw switch being in a first state, which state may be a closed state, and the described second state of the one contact in the single pole, single throw switch configuration is equivalent to the first contact of the single pole, double throw switch being in an second state, which state may be an open state.

In the single pole, double throw configuration, the second contact may be connected to one or more indicator device, such as a light emitting device, for example a bulb or light emitting diode (LED), a sounder, for example a speaker, or other indicator device to indicate to a user whether the first and/or second contact is in a closed or open state. For example, when the first contact is in an open state, the second contact is in a closed state and an LED may be illuminated to indicate the state of the system to a user, for example that the system is not operational, or alternatively that the system is operational.

The first switch <NUM> is configured to facilitate the provision of electrical power to a first component of the oxyhydrogen gas generator system <NUM> when in the first state and to facilitate prevention of the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM> when in the second state. This provides the benefit of automatically shutting off the oxyhydrogen gas generator system <NUM>, or at least a first component of the oxyhydrogen gas generator system <NUM>, when the first switch <NUM> is controlled by the controller <NUM> to be in a second state, to prevent the provision of electrical power to components, such as the first component, of the oxyhydrogen gas generator system <NUM>.

The ability to automatically shut off of the oxyhydrogen gas generator system <NUM>, or at least a first component of the oxyhydrogen gas generator system <NUM>, may help to prevent damage to the components of the oxyhydrogen gas generator system <NUM> and/or prevent dangerous conditions being present due to the operation of the oxyhydrogen gas generator system <NUM>, and in particular due to the operation of the first component of the oxyhydrogen gas generator system <NUM>. For example, the automatic shutoff of the oxyhydrogen gas generator system <NUM>, or at least a first component of the oxyhydrogen gas generator system <NUM>, may help to prevent overheating of the system, such that a risk of fire is reduced or eliminated.

The first component of the oxyhydrogen gas generator system <NUM> may be either the oxyhydrogen gas generator <NUM> or a heater <NUM> (see <FIG>) associated with the oxyhydrogen gas generator system <NUM>.

Control of the oxyhydrogen gas generator <NUM> may be direct, for example by the supply of electrical power to the oxyhydrogen gas generator <NUM>, or indirect, for example by the control of a heater <NUM> associated with the oxyhydrogen gas generator system <NUM>. The heater <NUM> may be configured to heat a fluid passing through or to be passed through the oxyhydrogen gas generator <NUM>. The heater <NUM> may be configured to control, at least in part, the chemical reactions in the oxyhydrogen gas generator <NUM>, in particular to control an electrolytic process carried out in, or at, the oxyhydrogen gas generator <NUM>, and therefore to control the operation of the oxyhydrogen gas generator <NUM>.

The efficiency of the electrolytic process may be dependent on the temperature of a fluid in the oxyhydrogen gas generator <NUM>. The oxyhydrogen gas generator <NUM> is configured to provide a process of electrolysis. In the process of electrolysis at the oxyhydrogen gas generator <NUM>, electric current is provided to a fluid, which may be a water based solution, to dissociate water molecules.

In order to aid understanding of embodiments of the invention, the components of the system <NUM> are described in more detail below. In various embodiments some of the components may be omitted. For example, one or more of the measurement devices <NUM> may be omitted.

<FIG> illustrates an example fluid circulation system <NUM> according to various embodiments. The oxyhydrogen gas generator system <NUM> may comprise the fluid circulation system <NUM>. The fluid circulation system <NUM> is configured to supply a fluid to the oxyhydrogen gas generator <NUM>.

A fluid supply <NUM> may be contained in a vessel <NUM>. The vessel <NUM> may be a fluid tank or reservoir. The vessel <NUM> may have an aperture <NUM> to facilitate the insertion of a fluid into the vessel <NUM>, by a user. The aperture <NUM> may be positioned on an upper part, or the uppermost part, of the vessel <NUM>, to facilitate access by the user. The aperture <NUM> may be closable by the use of a closure <NUM>, such as a screw cap or press fitting cap. The vessel <NUM> may be operationally connected to, or associated with, the oxyhydrogen gas generator <NUM>, such that fluid from the vessel <NUM> may be passed or transported to, or through, the oxyhydrogen gas generator <NUM>. None, one or more intermediate components may exist between the vessel <NUM> and the oxyhydrogen gas generator <NUM>.

A pump <NUM> or similar device may be configured, or may be used, to facilitate the passage or transportation of the fluid from the vessel <NUM> to the oxyhydrogen gas generator <NUM>. The pump <NUM> or similar device may be controlled by the controller <NUM>. The pump <NUM> or similar device may only be operational when the fluid level in the vessel <NUM> is detected to be above a minimum threshold level, which may be at a minimum operative level <NUM>.

By preventing operation of the pump <NUM> when the fluid level is below a minimum threshold level corresponding to a minimum operational level <NUM>, damage to the pump <NUM> or other components of the oxyhydrogen gas generator system <NUM> is minimized or prevented. The pump <NUM> may be a positive displacement pump such as a peristaltic pump, an impeller pump or a flexible impeller pump. Alternatively, the pump <NUM> may be an impulse pump. Alternatively, the pump <NUM> may be a velocity pump, such as a centrifugal pump.

The fluid may be a liquid. The liquid may be a solution. The solution may comprise water and an electrolyte. The water may comprise distilled water, such that impurities, including various minerals and ions, do not affect the operation of the oxyhydrogen gas generator <NUM>. The electrolyte may be a hydroxide containing compound. The electrolyte may be potassium hydroxide. Alternatively the electrolyte may be sodium hydroxide. The electrolyte may be of a purity between <NUM>% and <NUM>%, or between <NUM>% and <NUM>%. The electrolyte may be, for example, <NUM>% purity. The potassium hydroxide may be provided in the solution in a range from <NUM> grams per litre of distilled water to <NUM> grams per litre of distilled water, or in a range from <NUM> grams per litre of distilled water to <NUM> grams per litre of distilled water. Specifically, potassium hydroxide may be provided at <NUM> grams per litre of distilled water. Alternatively, potassium hydroxide may be provided at <NUM> grams per litre of distilled water.

At such concentrations, the potassium hydroxide solution may not be corrosive and may not therefore be detrimental to the operation of the oxyhydrogen gas generator <NUM>, or ultimately to an engine that the oxyhydrogen gas generator <NUM> may be associated with or connected to. The oxyhydrogen gas produced from, or provided by, the potassium hydroxide solution may also provide a beneficial cleaning function of the associated or connected engine, by reducing the amount of hydrocarbon based fuel required, and providing a more complete burn of the hydrocarbon based fuel in the combustion process in the engine.

The fluid circulation system <NUM> comprises passageways <NUM> for the passage or transportation of a fluid, such as may be formed using pipes or tubes. The passageways <NUM> may be formed of metal, plastic, elastomeric material, or other material, or combination thereof, which is chemically compatible with, or chemically inert to, the electrolyte solution. In particular it may be formed of material which is chemically compatible with, or chemically inert to, a potassium hydroxide solution.

The fluid circulation system <NUM> provides a fluid circulation path, for the circulation of a fluid from the fluid supply <NUM>, in a first direction <NUM>, to the oxyhydrogen gas generator <NUM>, and back to the fluid supply <NUM>. As described above, the oxyhydrogen gas generator system <NUM> may comprise a vessel <NUM> for containment of the fluid supply <NUM>. Furthermore, the fluid from that vessel <NUM> may be carried or transported to the oxyhydrogen gas generator <NUM>, such that the fluid is present at the oxyhydrogen gas generator <NUM>, to facilitate the production of hydrogen gas and oxygen gas via a process of electrolysis. A mixture of hydrogen gas and oxygen gas may be called oxyhydrogen. Typically the ratio of hydrogen to oxygen, produced by the oxyhydrogen gas generator <NUM>, is <NUM>:<NUM>. Oxyhydrogen, when ignited, converts to water vapour and releases energy. The oxyhydrogen gas generator <NUM> may produce monatomic hydrogen, which may be quickly injected into the air intake of an engine in a vehicle <NUM>.

The vessel <NUM> and the oxyhydrogen gas generator <NUM> describe two points in the fluid circulation path. As previously noted, a pump <NUM> or similar device may be used to facilitate the carriage, or transportation, of fluid from the vessel <NUM> to the oxyhydrogen gas generator <NUM>. The pump <NUM> or similar device may be located between the vessel <NUM> and the oxyhydrogen gas generator <NUM>. The pump <NUM> may have an intake <NUM> connected to the passageway <NUM> leading from the vessel <NUM>, and an outlet <NUM> connected to the passageway <NUM> leading to the oxyhydrogen gas generator <NUM>. Oxyhydrogen gas produced at the oxyhydrogen gas generator <NUM> may pass, or be conveyed, from the oxyhydrogen gas generator <NUM> to a connected or associated engine air intake either directly or via the vessel <NUM>. Various passageways <NUM> may connect these and/or further additional components in the fluid circulation path.

Example embodiments of the invention are illustrated in <FIG>, <FIG>. Features of the apparatus that are the same or similar as corresponding features in the apparatus that can be seen in <FIG> or in the others of <FIG>, <FIG>, and described herein, are referenced by the same reference numerals.

Each of the measurement devices <NUM> may form part of the oxyhydrogen gas generator control system <NUM> or be separate thereto. The measurement devices <NUM>, from one or more of which the controller <NUM> is configured to receive output, may include one or more of a power supply measurement device <NUM>, a fluid level measurement device <NUM>, a fluid flow measurement device <NUM>, one or a plurality of temperature measurement devices. The one or the plurality of temperature measurement devices may include an ambient temperature measurement device <NUM> and/or one or more fluid temperature measurement devices. The one or more fluid temperature measurement devices may include a first fluid temperature measurement device <NUM>. Additionally, the one or more fluid temperature measurement devices may include a second fluid temperature measurement device <NUM>. In various embodiments one or more of these measurement devices <NUM>, may be omitted.

The power supply measurement device <NUM> may be configured to measure a power level by measurement of a power level parameter of an electrical power supply. The power supply measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, dependent on the power level parameter. The controller <NUM> may be configured to receive the output <NUM>-<NUM> from the power supply measurement device <NUM>, the received output <NUM>-<NUM> being dependent on the measurement of the power level parameter. The controller <NUM> may control the state of the first switch <NUM> based, at least in part, on the output <NUM>-<NUM>.

The power level parameter may be compared to a single power level threshold. Alternatively, multiple power level thresholds may be provided relating to different power levels. The multiple power level thresholds may provide a number of discrete power level thresholds relating to different power levels at the power supply. The multiple power level thresholds may be used to provide an element of hysteresis in the system to prevent rapid switching of the output <NUM>-<NUM>.

At or above the single power level threshold, or at or above one of the one or more multiple power level thresholds, the output <NUM>-<NUM> may have a first value and below the single power level threshold, or below another one of the one or more multiple level thresholds, the output <NUM>-<NUM> may have a second value.

The power level parameter may be a parameter relating to current and/or voltage being provided by the power supply. The power supply measurement device <NUM> may be, or may comprise, a power supply sensor such as a current and/or voltage meter. The power supply measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, with or without hysteresis. The hysteresis may help to minimise or prevent rapid switching of the first switch <NUM>. The power supply measurement device <NUM> may be associated with, or comprise, an automatic voltage relay.

In one example, the power supply measurement device <NUM> may be configured to measure a voltage at the power supply. The single power level threshold may be a threshold between <NUM> Volts and <NUM> Volts. For example the single power level threshold may be <NUM> Volts. If the measured voltage is above <NUM> Volts then the output <NUM>-<NUM> may be a first value. If the measured voltage is below <NUM> Volts then the output <NUM>-<NUM> may be a second value.

The controller <NUM> may be configured to control the first switch <NUM> dependent, at least in part, on the value of the output <NUM>-<NUM>. If the output <NUM>-<NUM> is a first value then the controller <NUM> may control the first switch <NUM> to be in a first state to facilitate the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>. If the output <NUM>-<NUM> is a second value then the controller <NUM> may control the first switch <NUM> to be in a second state to prevent the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>.

In an alternative example, if multiple power level thresholds are provided then the output <NUM>-<NUM> may provide a first value when the measured voltage rises above a first of the multiple power level thresholds, and not provide an output <NUM>-<NUM> at a second value until the measured voltage subsequently falls below a second of the multiple power level thresholds. For example, the first of the multiple power level thresholds may be <NUM> Volts and the second of the multiple power level thresholds may be <NUM> Volts, such that an output <NUM>-<NUM> is a first value when the voltage increases to a value at or above <NUM> Volts, and that subsequently the output is a second value when the voltage decreases to a value of <NUM> Volts or lower.

By the power supply measurement device <NUM> being configured to measure a voltage at the power supply with regards to multiple power level thresholds, the system may be prevented from rapidly switching the output <NUM>-<NUM> between the first and second values, and thus may prevent rapid switching of the first switch <NUM>.

The fluid level measurement device <NUM> may be configured to measure a fluid level by measurement of a fluid level parameter of a fluid supply <NUM> for the oxyhydrogen gas generator <NUM>. The fluid level measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, dependent on the fluid level parameter. The controller <NUM> may be configured to receive the output <NUM>-<NUM> from the fluid level measurement device <NUM>, the received output <NUM>-<NUM> being dependent on the measurement of the fluid level parameter of the fluid supply <NUM>. The controller <NUM> may control the state of the first switch <NUM> based, at least in part, on the output <NUM>-<NUM>. The fluid level parameter may be compared to a single fluid level threshold. Alternatively, multiple fluid level thresholds may be provided relating to different fluid levels. The multiple fluid level thresholds may provide a number of discrete fluid level thresholds relating to different fluid levels in the fluid supply <NUM>. The multiple fluid level thresholds may be used to provide an element of hysteresis in the system to prevent rapid switching of the output <NUM>-<NUM>.

Above the single fluid level threshold, or above one of the one or more multiple fluid level thresholds, the output <NUM>-<NUM> may have a first value and below the single fluid level threshold, or below another one of the one or more multiple fluid level thresholds, the output <NUM>-<NUM> may have a second value.

The fluid level measurement device <NUM> may be, or may comprise, a fluid level sensor such as a float switch. The fluid level measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, with or without hysteresis. The hysteresis may minimize or prevent rapid switching of the first switch <NUM>. Alternatively, or additionally, the fluid level measurement device <NUM> may provide or determine a time averaged fluid level measurement. Alternatively, the controller <NUM> may determine, from output <NUM>-<NUM>, an average fluid level measurement over a determined time period. The time averaged fluid level measurement may minimise or prevent rapid switching of the first switch <NUM>.

The fluid level measurement device <NUM> may comprise a single sensor configured to detect a fluid level in relation to a single threshold, or have a plurality of discrete sensors configured to detect a fluid level in relation to a number of discrete thresholds. Alternatively, a single sensor may be configured to detect a fluid level in relation to a plurality of thresholds. The fluid level parameter may be a value relative to a physical fluid level of the fluid supply <NUM>. The fluid level measurement device <NUM> may be configured to measure an instantaneous fluid level or a time averaged fluid level.

The fluid level measurement device <NUM> may be located at the vessel <NUM> for measuring the level of a fluid in the fluid supply <NUM>. The fluid level measurement device <NUM> may be located within the vessel <NUM>, for example the fluid level measurement device <NUM> may be a float switch in the vessel <NUM>. Alternatively, the fluid level measurement device <NUM> may be located outside of the vessel <NUM>, for example on a side of the vessel <NUM>, such as a vessel wall. The fluid level measurement device <NUM> may be configured to measure the fluid level via indirect means or methods, such as by the use of an optical sensor which may provide a light beam projected towards the fluid, to be reflected from the fluid, back to the sensor, or which may comprise a transmitter and a separate receiver in the optical path of the transmitter to transmit a light beam or similar across an interior of the vessel <NUM> to be received at the receiver, from the transmitter, to measure the incidence of fluid within the light beam path.

In one example, a fluid level measurement device <NUM> comprising a fluid level sensor such as a float switch, may be configured to measure a fluid level of a fluid supply <NUM> for the oxyhydrogen gas generator <NUM>. If the measured fluid level is above a set fluid level threshold, output <NUM>-<NUM> may be a first value. If the measured fluid level is below the set fluid level threshold, output <NUM>-<NUM> may be a second value. If the output <NUM>-<NUM> is a first value then the controller <NUM> may control the first switch <NUM> to be in a first state to facilitate the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>. If the output <NUM>-<NUM> is a second value then the controller <NUM> may control the first switch <NUM> to be in a second state to prevent the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>.

In an alternative example, if multiple fluid level thresholds are provided then the output <NUM>-<NUM> may provide a first value when the measured fluid level rises above a first of the multiple fluid level thresholds, and not provide an output <NUM>-<NUM> at a second value until the measured fluid level subsequently falls below a second of the multiple fluid level thresholds. If the output <NUM>-<NUM> is a first value then the controller <NUM> may control the first switch <NUM> to be in a first state to facilitate the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>. If the output <NUM>-<NUM> is a second value then the controller <NUM> may control the first switch <NUM> to be in a second state to prevent the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>. By the fluid flow measurement device <NUM> being configured to measure a fluid level of the fluid supply <NUM> for the oxyhydrogen gas generator <NUM>, with regards to multiple fluid level thresholds, the system may be prevented from rapidly switching the output <NUM>-<NUM> between the first and second values, and thus may prevent rapid switching of the first switch <NUM>.

The fluid flow measurement device <NUM> may be configured to measure a fluid flow by measurement of a fluid parameter of a fluid from a fluid supply <NUM> for the oxyhydrogen gas generator <NUM>. For example, the fluid flow measurement device <NUM> may measure a fluid flow rate or a pressure value of the fluid. The fluid flow measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, dependent on the fluid flow parameter. The controller <NUM> may be configured to receive the output <NUM>-<NUM> from the fluid flow measurement device <NUM>, the received output <NUM>-<NUM> being dependent on the measurement of the fluid flow parameter.

The controller <NUM> may control the state of the first switch <NUM> based, at least in part, on the output <NUM>-<NUM>. The fluid flow parameter may be compared to a single fluid flow threshold. Alternatively, multiple fluid flow thresholds may be provided relating to different fluid flows. The multiple fluid flow thresholds may provide a number of discrete fluid flow thresholds relating to different fluid flow, such as different fluid flow rates, in the fluid circulation system <NUM>. The multiple fluid flow thresholds may be used to provide an element of hysteresis in the system to prevent rapid switching of the output <NUM>-<NUM>.

Above the single fluid flow threshold, or above one of the one or more multiple fluid flow thresholds, the output <NUM>-<NUM> may have a first value and below the single fluid flow threshold, or below another one of the one or more multiple fluid flow thresholds, the output <NUM>-<NUM> may have a second value.

The fluid flow measurement device <NUM> may be, or may comprise, a mechanical flow meter, a pressure flow meter or an optical flow meter, any of which may be configured to provide an output <NUM>-<NUM>, with or without hysteresis. The hysteresis may minimize or prevent rapid switching of the first switch <NUM>. For example, a pressure flow meter comprising a microswitch may be provided within the fluid flow. The microswitch may be set to switch between states, i.e. a switched state and an unswitched state, when the pressure exerted by the fluid in at least a part of the fluid circulation system <NUM> exceeds a set or predetermined value.

Alternatively or additionally, the fluid flow measurement device <NUM> may provide or determine a time averaged fluid flow measurement. Alternatively, the controller <NUM> may determine, from output <NUM>-<NUM>, an average fluid flow measurement over a determined time period. The time averaged fluid flow measurement may minimise or prevent rapid switching of the first switch <NUM>.

The fluid flow measurement device <NUM> may be, or may comprise, a fluid flow sensor and be configured to measure the flow of fluid in the fluid circulation path. The fluid flow measurement device <NUM> may be positioned within or along the fluid circulation path. The fluid flow measurement device <NUM> may be positioned before the pump <NUM> or similar device or after the pump <NUM> or similar device in the fluid circulation path in a first direction <NUM> of the flow of the fluid from the fluid supply <NUM> in the vessel <NUM>.

In one example, a fluid flow measurement device <NUM>, comprising a microswitch, may be configured to measure a pressure of a fluid flow. If the measured pressure is above a set or predetermined pressure threshold of the microswitch then the microswitch switches, from an unswitched state to a switched state, and output <NUM>-<NUM> may be a first value. If the measured pressure is below the set or predetermined pressure threshold of the microswitch then the microswitch does not switch, or, if previously in a switched state, reverts to an unswitched state and output <NUM>-<NUM> may be a second value. The controller <NUM> may be configured to control the first switch dependent, at least in part, on the value of the output <NUM>-<NUM>. If the output <NUM>-<NUM> is a first value then the controller <NUM> may control the first switch <NUM> to be in a first state to facilitate the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>. If the output <NUM>-<NUM> is a second value then the controller <NUM> may control the first switch <NUM> to be in a second state to prevent the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>.

In an alternative example, if multiple pressure thresholds are provided then the output <NUM>-<NUM> may provide a first value when the measured pressure rises above a first of the multiple pressure thresholds, and not provide an output <NUM>-<NUM> at a second value until the measured pressure subsequently falls below a second of the multiple pressure thresholds.

The controller <NUM> may be configured to control the first switch dependent, at least in part, on the value of the output <NUM>-<NUM>. If the output <NUM>-<NUM> is a first value then the controller <NUM> may control the first switch <NUM> to be in a first state to facilitate the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>. If the output <NUM>-<NUM> is a second value then the controller <NUM> may control the first switch <NUM> to be in a second state to prevent the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>. By the fluid flow measurement device <NUM> being configured to measure a pressure of the fluid flow with regards to multiple pressure threshold levels, the system may be prevented from rapidly switching the output <NUM>-<NUM> between the first and second values, and thus may prevent rapid switching of the first switch <NUM>.

The ambient temperature measurement device <NUM> may be configured to measure an ambient temperature by measurement of an ambient temperature parameter of the air surrounding the oxyhydrogen gas generator <NUM>. The ambient temperature measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, dependent on the ambient temperature parameter. The controller <NUM> may be configured to receive the output <NUM>-<NUM> from the ambient temperature measurement device <NUM>, the received output <NUM>-<NUM> being dependent on the measurement of the ambient temperature parameter.

The controller <NUM> may control the state of the first switch <NUM> based, at least in part, on the output <NUM>-<NUM>. The ambient temperature parameter may be compared to a single ambient temperature threshold. Alternatively, multiple ambient temperature thresholds may be provided relating to different ambient temperatures. The multiple ambient temperature thresholds may provide a number of discrete ambient temperature thresholds relating to different ambient temperatures in the air surrounding the oxyhydrogen gas generator <NUM>. The multiple ambient temperature thresholds may be used to provide an element of hysteresis in the system to prevent rapid switching of the output <NUM>-<NUM>.

Below the single ambient temperature threshold, or below one of the one or more multiple ambient temperature thresholds, the output <NUM>-<NUM> may have a first value and above the single ambient temperature threshold, or above another one of the one or more multiple ambient temperature thresholds, the output <NUM>-<NUM> may have a second value.

The ambient temperature measurement device <NUM> may be, or may comprise, a temperature sensor such as a thermocouple or thermistor. The ambient temperature measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, with or without hysteresis. The hysteresis may minimize or prevent rapid switching of the first switch <NUM>. The ambient temperature measurement device <NUM> may provide or determine a time averaged ambient temperature measurement. Alternatively, the controller <NUM> may determine, from output <NUM>-<NUM>, an average ambient temperature measurement over a determined time period. The time averaged ambient temperature measurement may minimise or prevent rapid switching of the first switch <NUM>.

The ambient temperature measurement device <NUM> may be positioned above the oxyhydrogen gas generator system <NUM>. A plurality of ambient temperature measurement devices <NUM> may be positioned in different locations around the oxyhydrogen gas generator system <NUM> and an average value, such as a mean or median value, of the ambient temperature may be calculated. The calculation may be made or performed at the controller <NUM>. The ambient temperature parameter threshold may be set in the range of <NUM> to <NUM>. The ambient temperature parameter threshold may be <NUM>.

In one example, the ambient temperature measurement device <NUM>, comprising an ambient temperature sensor, may be configured to measure an ambient temperature parameter of the air surrounding the oxyhydrogen gas generator <NUM>. The ambient temperature parameter threshold may be a threshold between <NUM> and <NUM>. For example, the ambient temperature parameter threshold may be <NUM>. If the measured ambient temperature is below <NUM> then the output <NUM>-<NUM> may be a first value. If the measured ambient temperature is above <NUM> then the output <NUM>-<NUM> may be a second value.

In an alternative example, if multiple ambient temperature parameter thresholds are provided then the output <NUM>-<NUM> may provide a second value when the measured ambient temperature rises above a first of the multiple ambient temperature thresholds, and not provide an output <NUM>-<NUM> at a first value until the measured ambient temperature subsequently falls below a second of the multiple ambient temperature thresholds. For example the first of the multiple threshold levels may be <NUM> and the second of the multiple threshold levels may be <NUM>.

By the ambient temperature measurement device <NUM> being configured to measure an ambient temperature parameter of the air surrounding the oxyhydrogen gas generator <NUM> with regards to multiple threshold levels, the system may be prevented from rapidly switching the output <NUM>-<NUM> between the first and second values, and thus may prevent rapid switching of the first switch <NUM>.

The first fluid temperature measurement device <NUM> may be configured to measure a first fluid temperature by measurement of a first fluid temperature parameter of a fluid being supplied or to be supplied to the oxyhydrogen gas generator <NUM>. The first fluid temperature measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, dependent on the first fluid temperature parameter. The controller <NUM> may be configured to receive the output <NUM>-<NUM> from the first fluid temperature measurement device <NUM>, the received output <NUM>-<NUM> being dependent on the measurement of the first fluid temperature parameter of the fluid.

The controller <NUM> may control the state of the first switch <NUM> based, at least in part, on the output <NUM>-<NUM>. The first fluid temperature parameter may be compared to a single first fluid temperature threshold. Alternatively, multiple first fluid temperature thresholds may be provided relating to different first fluid temperatures. The multiple first fluid temperature thresholds may provide a number of discrete first fluid temperature thresholds relating to different first fluid temperatures of a fluid being supplied or to be supplied to the oxyhydrogen gas generator <NUM>. The multiple first fluid temperature thresholds may be used to provide an element of hysteresis in the system to prevent rapid switching of the output <NUM>-<NUM>.

Below the single first fluid temperature threshold, or below one of the one or more multiple first fluid temperature thresholds, the output <NUM>-<NUM> may have a first value and above the single first fluid temperature threshold, or above another one of the one or more multiple first fluid temperature thresholds, the output <NUM>-<NUM> may have a second value.

The first fluid temperature measurement device <NUM> may be, or may comprise, a temperature sensor such as a thermocouple or thermistor. The first fluid temperature measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, with or without hysteresis. The hysteresis may minimize or prevent rapid switching of the first switch <NUM>. The first fluid temperature measurement device <NUM> may provide or determine a time averaged first fluid temperature measurement. Alternatively, the controller <NUM> may determine, from output <NUM>-<NUM>, an average first fluid temperature measurement over a determined time period. The time averaged first fluid temperature measurement may minimise or prevent rapid switching of the first switch <NUM>.

The first fluid temperature measurement device <NUM> may be positioned at the vessel <NUM> containing the fluid supply <NUM>, and may be positioned in the vessel <NUM> containing the fluid supply <NUM>, such that it is positioned within the fluid or such that it may take a direct measurement of the fluid. Alternatively, the first fluid temperature measurement device <NUM> may be positioned on an outer wall of the vessel <NUM>, at a position at, or below, a minimum operative level <NUM> of the fluid to measure a temperature relating to the temperature of the fluid. The first fluid temperature measurement device <NUM> may be adhered to the interior or exterior of the wall of the vessel <NUM> using an adhesive, such as cyanoacrylate. The first fluid temperature parameter threshold may be set in the range of <NUM> to <NUM>, or in the range <NUM> to <NUM>, or in the range <NUM> to <NUM>. The first fluid temperature parameter threshold may be <NUM>.

In one example, the first fluid temperature measurement device <NUM>, comprising a temperature sensor, may be configured to measure a first fluid temperature parameter of a fluid being supplied or to be supplied to the oxyhydrogen gas generator <NUM>. The first fluid temperature parameter threshold may be a threshold between <NUM> and <NUM>. For example, the first fluid temperature parameter threshold may be <NUM>. If the measured first fluid temperature is below <NUM> then the output <NUM>-<NUM> may be a first value. If the measured first fluid temperature is above <NUM> then the output <NUM>-<NUM> may be a second value.

In an alternative example, if multiple first fluid temperature parameter thresholds are provided then the output <NUM>-<NUM> may provide a second value when the measured first fluid temperature rises above a first of the multiple first fluid temperature thresholds, and not provide an output <NUM>-<NUM> at a first value until the measured first fluid temperature subsequently falls below a second of the multiple first fluid temperature thresholds.

For example the first of the multiple first fluid temperature parameter thresholds may be <NUM> and the second of the multiple threshold levels may be <NUM>. The controller <NUM> may be configured to control the first switch <NUM> dependent, at least in part, on the value of the output <NUM>-<NUM>. If the output <NUM>-<NUM> is a first value then the controller <NUM> may control the first switch <NUM> to be in a first state to facilitate the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>. If the output <NUM>-<NUM> is a second value then the controller <NUM> may control the first switch <NUM> to be in a second state to prevent the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>.

By the first fluid temperature measurement device <NUM> being configured to measure a first fluid temperature parameter of a fluid being supplied or to be supplied to the oxyhydrogen gas generator <NUM> with regards to multiple threshold levels, the system may be prevented from rapidly switching the output <NUM>-<NUM> between the first and second values, and thus may prevent rapid switching of the first switch <NUM>.

A heater <NUM>, which may be comprised in or be separate to the oxyhydrogen gas generator control system <NUM> and/or which may comprise the first component of the oxyhydrogen gas generator system <NUM>, may be provided in or along the fluid circulation path. The heater <NUM> may be positioned before or after the fluid flow measurement device <NUM> and/or the pump <NUM> in the first direction <NUM> of the flow of the fluid from the fluid supply <NUM> in the vessel <NUM>. The heater <NUM> may be positioned such that the first fluid temperature measurement device <NUM> is located upstream of the heater <NUM> relative to the first direction <NUM> of the flow of the fluid in the fluid circulation path of the oxyhydrogen gas generator system <NUM>.

The heater <NUM> may be an inline heater such that the fluid is heated as it passes through the heater <NUM>, such a heater <NUM> may have a heating element inside or outside of the fluid passing through the heater <NUM>. Where multiple first fluid temperature thresholds are provided, as previously described, the efficacy of the heater <NUM> may be controlled to provide temperature control of the fluid, dependent on whether the one or more first fluid temperature thresholds are met or exceeded. The heater <NUM> provides the benefit of quickly bringing the temperature of the fluid up to an optimal working temperature. The optimal working temperature may be a temperature where the oxyhydrogen gas generator <NUM> will be most efficient at producing oxyhydrogen gas.

In an example illustrated in <FIG> the measurement devices <NUM> include a power supply measurement device <NUM> providing an output <NUM>-<NUM>, a fluid level measurement device <NUM> providing an output <NUM>-<NUM>, a fluid flow measurement device <NUM> providing an output <NUM>-<NUM>, and an ambient temperature measurement device <NUM> providing an output <NUM>-<NUM>. In the example of <FIG> the first component of the oxyhydrogen gas generator system <NUM> is the oxyhydrogen generator <NUM>.

In an example illustrated in <FIG> the measurement devices <NUM> include a power supply measurement device <NUM> providing an output <NUM>-<NUM>, and a first fluid temperature measurement device <NUM> providing an output <NUM>-<NUM>. In the example of <FIG> the first component of the oxyhydrogen gas generator system <NUM> is a heater <NUM> which, at least in part, controls the temperature of the fluid which is conveyed to the oxyhydrogen gas generator <NUM>.

<FIG> illustrates a schematic diagram of a system <NUM> including an oxyhydrogen gas generator <NUM>, an oxyhydrogen gas generator control system <NUM>, measurement devices <NUM>, a first switch <NUM>, a second switch <NUM> and a third switch <NUM>. In some examples the third switch <NUM> may be omitted.

In the example illustrated in <FIG> the measurement devices <NUM> include a power supply measurement device <NUM> providing an output <NUM>-<NUM>, a fluid level measurement device <NUM> providing an output <NUM>-<NUM>, a fluid flow measurement device <NUM> providing an output <NUM>-<NUM>, an ambient temperature measurement device <NUM> providing an output <NUM>-<NUM>, a first fluid temperature measurement device <NUM> providing an output <NUM>-<NUM>, and a second fluid temperature measurement device <NUM> providing an output <NUM>-<NUM> as further described below. In some examples the second fluid temperature measurement device <NUM> may be omitted. In the example of <FIG> the first component of the oxyhydrogen gas generator system <NUM> is the oxyhydrogen gas generator <NUM>.

The controller <NUM> is configured to receive output <NUM>-<NUM> from a first fluid temperature measurement device <NUM>, the received output <NUM>-<NUM> being dependent on the measurement of a first fluid temperature parameter of a fluid, which fluid is to be supplied to the oxyhydrogen gas generator <NUM>. The first fluid temperature measurement device <NUM> may be as previously described. The controller <NUM> is configured to control a second switch <NUM>, to control the operation of the oxyhydrogen gas generator <NUM>, dependent on the value of the first fluid temperature parameter, the second switch <NUM> having a first state and a second state.

The second switch <NUM> is configured to facilitate the provision of electrical power to a heater <NUM> when in the first state and to facilitate prevention of the provision of electrical power to the heater <NUM> when in the second state. This provides the benefit of automatically shutting off the heater <NUM> when the second switch <NUM> is controlled by the controller <NUM> to prevent the provision of electrical power to the heater. The automatic shutting off of the heater <NUM> may help to prevent damage to the heater <NUM> and/or prevent dangerous conditions being present due to the operation of the heater <NUM>. For example, the automatic shutoff of the of the heater may help to prevent overheating of the system, such that a risk of fire is reduced or eliminated.

The second switch <NUM>, which the controller <NUM> is configured to control, and which may form part of the oxyhydrogen gas generator control system <NUM> or be separate thereto, may be an electrically controllable switch, such as a relay. The second switch <NUM> may be, for example, a single pole, single throw switch or relay. The second switch <NUM> has a first closed state and a second open state. Alternatively the second switch <NUM> may be a single pole, double throw switch or relay. Operation of the second switch <NUM>, in the form of either a single pole, single throw switch or single pole, double throw switch, may be substantially the same as described above for the operation of the first switch <NUM>.

The controller is further configured to receive the outputs <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM> and <NUM>-<NUM> from the power supply measurement device <NUM>, fluid level measurement device <NUM>, fluid flow rate measurement device <NUM> and ambient temperature measurement device <NUM> respectively, and may control the state of the first switch dependent on the outputs <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM> and <NUM>-<NUM>, to facilitate the provision of electrical power to the oxyhydrogen gas generator <NUM> when the first switch is in the first state and to facilitate the prevention of the provision of electrical power to the oxyhydrogen gas generator when in the second state.

For example, in order to switch the first switch <NUM> to a first state to facilitate the provision of electrical power to the oxyhydrogen gas generator <NUM>, each of the power supply measurement device <NUM>, fluid level measurement device <NUM>, fluid flow rate measurement device <NUM> and ambient temperature measurement device <NUM> output a first value to the controller <NUM>. If any of the outputs <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM> from the power supply measurement device <NUM>, fluid level measurement device <NUM>, fluid flow rate measurement device <NUM> and ambient temperature measurement device <NUM>, to the controller, are of a second value then the controller controls the first switch <NUM> to switch the first switch <NUM> to a second state to prevent the provision of electrical power to the oxyhydrogen gas generator <NUM>.

A second fluid temperature measurement device <NUM> may be configured to measure a second fluid temperature by measurement of a second fluid temperature parameter of a fluid being supplied or to be supplied to the oxyhydrogen gas generator <NUM>. The second fluid temperature measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, dependent on the second fluid temperature parameter. The controller <NUM> may be configured to receive the output <NUM>-<NUM> from the second fluid temperature measurement device <NUM>, the received output <NUM>-<NUM> being dependent on the measurement of the second fluid temperature parameter of the fluid.

The controller <NUM> may control the state of the third switch <NUM> based, at least in part, on the output <NUM>-<NUM>. The second fluid temperature parameter may be compared to a single second fluid temperature threshold. Alternatively, multiple second fluid temperature thresholds may be provided relating to different second fluid temperatures. The multiple second fluid temperature thresholds may provide a number of discrete second fluid temperature thresholds relating to different second fluid temperatures of a fluid being supplied or to be supplied to the oxyhydrogen gas generator <NUM>. The multiple second fluid temperature thresholds may be used to provide an element of hysteresis in the system to prevent rapid switching of the output <NUM>-<NUM>.

Above the single second fluid temperature threshold, or above one of the one or more multiple second fluid temperature thresholds, the output <NUM>-<NUM> may have a first value and below the single second fluid temperature threshold, or below another one of the one or more multiple second fluid temperature thresholds, the output <NUM>-<NUM> may have a second value.

The second fluid temperature measurement device <NUM> may be, or may comprise, a temperature sensor such as a thermocouple or thermistor. The second fluid temperature measurement device <NUM> may be configured to provide an output <NUM>-<NUM>, with or without hysteresis. The hysteresis may minimize or prevent rapid switching of the first switch <NUM>. The second fluid temperature measurement device <NUM> may provide or determine a time averaged second fluid temperature measurement. Alternatively, the controller <NUM> may determine, from output <NUM>-<NUM>, an average second fluid temperature measurement over a determined time period. The time averaged second fluid temperature measurement may minimise or prevent rapid switching of the third switch <NUM>.

The second fluid temperature measurement device <NUM> may be positioned or located downstream of the heater <NUM> in the fluid circulation path of the oxyhydrogen gas generator system <NUM>. That is, the second fluid temperature measurement device <NUM> may be positioned downstream relative to the first direction <NUM> of the circulation of fluid, from the fluid supply <NUM> at the vessel <NUM>. The second fluid temperature measurement device <NUM> may be positioned or located within the fluid, such that it may take a direct measurement of the fluid, or external to a portion of passageway <NUM>, such as a portion of pipe or tube carrying the fluid, such that it may take an indirect measurement of the fluid.

The second fluid temperature measurement device <NUM> may be affixed to the exterior of the passageway <NUM> using a cable tie, tie wrap, worm clip or other fixing methods, arrangements or means, or alternatively adhered to the exterior of the passageway <NUM> using an adhesive such as cyanoacrylate. Alternatively, the second fluid temperature measurement device <NUM> may be affixed to the housing or casing of the heater <NUM> by any of the abovementioned methods. The second fluid temperature parameter threshold may be set in the range of <NUM> to <NUM>, in the range <NUM> to <NUM>. The second fluid temperature parameter threshold may be <NUM>.

In one example, the second fluid temperature measurement device <NUM>, comprising a temperature sensor, may be configured to measure a second fluid temperature parameter of a fluid being supplied or to be supplied to the oxyhydrogen gas generator <NUM>. The second fluid temperature parameter threshold may be a threshold between <NUM> and <NUM>. For example, the second fluid temperature parameter threshold may be <NUM>. If the measured second fluid temperature is above <NUM> then the output <NUM>-<NUM> may be a first value. If the measured second fluid temperature is below <NUM> then the output <NUM>-<NUM> may be a second value.

The controller <NUM> may be configured to control the third switch <NUM> dependent, at least in part, on the value of the output <NUM>-<NUM>. If the output <NUM>-<NUM> is a first value then the controller <NUM> may control the third switch <NUM> to be in a first state to facilitate the provision of electrical power to a cooler <NUM> (which may also be referred to as cooling means in some examples). If the output <NUM>-<NUM> is a second value then the controller <NUM> may control the third switch <NUM> to be in a second state to prevent the provision of electrical power to the cooler <NUM>.

In an alternative example, if multiple second fluid temperature parameter thresholds are provided then the output <NUM>-<NUM> may provide a first value when the measured second fluid temperature rises above a first of the multiple second fluid temperature thresholds, and not provide an output <NUM>-<NUM> at a second value until the measured second fluid temperature subsequently falls below a second of the multiple second fluid temperature thresholds.

For example the first of the multiple second fluid temperature parameter thresholds may be <NUM> and the second of the multiple second fluid temperature threshold levels may be <NUM>. The controller <NUM> may be configured to control the third switch <NUM> dependent, at least in part, on the value of the output <NUM>-<NUM>. If the output <NUM>-<NUM> is a first value then the controller <NUM> may control the third switch <NUM> to be in a first state to facilitate the provision of electrical power to a cooler <NUM>. If the output <NUM>-<NUM> is a second value then the controller <NUM> may control the third switch <NUM> to be in a second state to prevent the provision of electrical power to the cooler <NUM>.

By the second fluid temperature measurement device <NUM> being configured to measure a second fluid temperature parameter of a fluid being supplied or to be supplied to the oxyhydrogen gas generator <NUM> with regards to multiple threshold levels, the system may be prevented from rapidly switching the output <NUM>-<NUM> between the first and second values, and thus may prevent rapid switching of the third switch <NUM>.

The third switch <NUM> may be configured to facilitate the provision of electrical power to the cooler <NUM> when in the first state and to facilitate prevention of the provision of electrical power to the cooler <NUM> when in the second state. The third switch <NUM>, which the controller <NUM> is configured to control, and which may form part of the oxyhydrogen gas generator control system <NUM> or be separate thereto, may be an electrically controllable switch, such as a relay. The third switch <NUM> may be, for example, a single pole, single throw switch or relay. The third switch <NUM> has a first closed state and a second open state. Alternatively the third switch <NUM> may be a single pole, double throw switch or relay. Operation of the third switch <NUM>, may be substantially the same as described above for the operation of the first switch <NUM> and second switch <NUM>.

The cooler <NUM>, which may be comprised in or be separate to the oxyhydrogen gas generator control system <NUM>, may be provided to facilitate cooling of the fluid circulating along the fluid circulation path and/or facilitate cooling of the ambient temperature of the air surrounding the oxyhydrogen gas generator <NUM> and/or other components of the oxyhydrogen gas generator system <NUM>. The controller <NUM> may be configured to operate or control the cooler <NUM>. In particular the controller <NUM> may be configured to operate or control the cooler <NUM> in response to receiving output <NUM>-<NUM> from the second fluid temperature measurement device <NUM>. The cooler <NUM> may be configured to operate to transfer heat from a fluid in the fluid circulation path, when the measured second fluid temperature is above a second fluid temperature threshold. Where multiple second fluid temperature thresholds are provided, as previously described, the efficacy of the cooler <NUM> may be controlled to provide temperature control of the fluid, dependent on whether the one or more second fluid temperature thresholds are met or exceeded.

The cooler <NUM> may comprise a heat exchanger. The cooler <NUM> may comprise a thermoelectric heat pump, such as a Peltier cooing device, or a cyclic refrigeration unit or other suitable cooling arrangement. The cooler <NUM> may additionally or alternatively comprise a fan. The fan may operate to cool the fluid via convection.

To aid in cooling of the fluid, a radiator <NUM> may be provided. The radiator <NUM> may be in convective connection with the cooler <NUM>. The radiator may be conductively connected to passageway <NUM>, such as a pipe or tube, carrying the fluid for the oxyhydrogen gas generator <NUM>. Alternatively, the fluid may pass through the radiator <NUM>. The radiator <NUM> may be a containment vessel through which the fluid passes. The radiator <NUM> may form part of the fluid circulation path. The radiator <NUM> may further comprise fins on one or more outer surfaces to increase the surface area for heat exchange.

The cooler <NUM> provides the benefit of reducing the temperature of the fluid and/or the ambient temperature to a safe level, reducing the risk of damage to components of the oxyhydrogen gas generator system <NUM> and/or the risk of fire. The cooler <NUM> provides the benefit of bringing the temperature of the fluid to an optimal working temperature as previously described.

<FIG> illustrates an example fluid circulation system <NUM> according to various examples, in particular according to the example of <FIG>. The fluid circulation system <NUM> may form part of the oxyhydrogen gas generator system <NUM>. Features of the apparatus that are the same or similar as corresponding features in the apparatus that can be seen in <FIG>, and described herein, are referenced by the same reference numerals.

The oxyhydrogen gas generator system <NUM> may comprise the fluid circulation system <NUM>. The fluid circulation system <NUM> provides a fluid circulation path, for the circulation of the fluid from a fluid supply <NUM> in a vessel <NUM>, in a first direction <NUM>. Furthermore, the fluid from the vessel <NUM> may be carried or transported to the oxyhydrogen gas generator <NUM>, such that the fluid is present at the oxyhydrogen gas generator <NUM>, to facilitate the production of hydrogen and oxygen gas via a process of electrolysis. Thus the vessel <NUM> and the oxyhydrogen gas generator <NUM> describe two points in the fluid circulation path.

The fluid supply <NUM> may be contained in a vessel <NUM>, such as a fluid tank or reservoir, and be operationally connected to, or associated with, the oxyhydrogen gas generator <NUM>, such that fluid from the vessel <NUM> may be passed or transported to, or through, the oxyhydrogen gas generator <NUM>. In this example the first fluid temperature measurement device <NUM> is located at the vessel <NUM>, for monitoring the fluid temperature at the vessel <NUM>. The first fluid temperature measurement device <NUM> is located at a position at or below a minimum operative level <NUM> of the fluid to measure a temperature relating to the temperature of the fluid.

A pump <NUM>, or similar device, can be used or may be configured to extract the fluid from the vessel <NUM> and facilitate the carriage or passage of fluid from the vessel <NUM> to the oxyhydrogen gas generator <NUM>. Extraction of fluid from the vessel <NUM> to the pump <NUM> could be facilitated by positioning an extraction tube or pipe, provided by structured passageways <NUM>, below the minimum operative level <NUM> of the fluid in the vessel <NUM>. The vessel <NUM> and pump <NUM> may form a gravity fed system. The pump <NUM> or similar device may be controlled by the controller <NUM>. The controller <NUM> may be configured to operate or control the pump <NUM>. The pump <NUM> or similar device may only be operational when the fluid level in the vessel <NUM> is detected to be above a minimum threshold level corresponding to the minimum operative level <NUM>.

Between the vessel <NUM> and the pump <NUM> is a fluid flow measurement device <NUM> for measuring a fluid flow from the vessel <NUM> in the fluid circulation system <NUM>, brought about by the operation of the pump <NUM>. Alternatively, the fluid flow measurement device <NUM> may be positioned elsewhere in the fluid circulation system <NUM>.

The oxyhydrogen gas generator control system <NUM> may also comprise a delay relay. The delay relay is configured to bypass the fluid flow measurement device <NUM> for a period of time, for example <NUM> seconds, to allow circulation of fluid to begin on start up of the oxyhydrogen gas generator system <NUM> before the fluid flow measurement device <NUM> is operable. The pump <NUM> has an intake <NUM> connected to the passageway <NUM> leading from the vessel <NUM> via the fluid flow measurement device <NUM>, and an outlet <NUM> connected to the passageway <NUM> leading to the oxyhydrogen gas generator <NUM> via further components as described below.

Fluid from the outlet <NUM> of the pump <NUM> passes via passageway <NUM> to a heater <NUM>. The heater <NUM> may be operational if the temperature of the fluid monitored at the vessel <NUM> is below a threshold temperature as previously described. The heater <NUM> may be an inline heater such that fluid passes through the interior of the housing of the heater <NUM>. A second fluid temperature measurement device <NUM> may be affixed to the exterior of the passageway <NUM> at the outlet of the heater <NUM> using a cable tie, tie wrap, worm clip or other fixing methods, arrangements or means, or alternatively adhered to the exterior of the passageway <NUM> using an adhesive such as cyanoacrylate. Alternatively, the second fluid temperature measurement device <NUM> may be affixed to the housing or casing of the heater <NUM>, either by using a cable tie, tie wrap, worm clip, adhesive or other fixing methods, arrangements or means.

Fluid from the heater <NUM> passes or is transported to the oxyhydrogen gas generator via a radiator <NUM>. The radiator <NUM> may comprise a chamber or series of interconnected chambers, with an inlet and an outlet for the fluid circulating in the fluid circulation system <NUM>. The radiator <NUM> may have fins or other structured elements conductively connected to one or more of the outer surfaces of the radiator <NUM> to provide increased surface area for the exchange of heat from the fluid to the surrounding air. The radiator <NUM> may be formed of one or more of metal, plastic, elastomeric material, or other material, or combination thereof, which is chemically compatible with or chemically inert to the electrolyte solution, and in particular the potassium hydroxide solution.

A cooling device <NUM> may be configured to conduct or convect heat from the radiator <NUM> to the surrounding air to aid in the cooling of the fluid.

The fluid then passes, or is transported into the oxyhydrogen gas generator <NUM>, where, via a process of electrolysis, hydrogen and oxygen gasses may be produced.

The oxyhydrogen gas generator <NUM>, as illustrated in <FIG>, may comprise plates <NUM>. The plates <NUM> may be uncoated to minimize or avoid contamination of the fluid. The plates <NUM> may be formed of metal, such as titanium. Alternatively the plates <NUM> may be stainless steel, nickel or copper. A structure of spatially separated plates <NUM> is arranged to facilitate electrolysis. The plates <NUM> comprise alternative positive and negative plates. The positive plates may be of a thickness between <NUM> and <NUM>, or between <NUM> and <NUM>, or at <NUM>. The negative plates may be of a thickness between <NUM> and <NUM>, or between <NUM> and <NUM>, or at <NUM>. The plates <NUM> are separated from each other by a spacer or gasket <NUM>. The gasket <NUM> may be between <NUM> and <NUM> thick. The gasket <NUM> may be <NUM>. The gasket may be formed of a non-conductive material. The gasket may be formed of plastic, elastomeric material, or other material, or combination thereof. The gasket may be chemically compatible with or chemically inert to the electrolyte solution, in particular the potassium hydroxide solution.

The hydrogen and oxygen gasses produced via electrolysis are passed, transported, or injected into the air intake of an engine, for example an internal combustion engine, which may be an engine which uses petrol (gasoline) or diesel as a fuel, whilst fluid may return via the passageways <NUM> of the fluid circulation system <NUM>, back to the vessel <NUM>.

In some examples, a user input control, which may be comprised in or be separate to the oxyhydrogen gas generator control system <NUM>, may be provided and be configured to selectively control an electrical power supply as an electrical power input to the oxyhydrogen gas generator system <NUM>. The user input control may be a vehicle ignition switch. The electrical power supply may be further configured to supply electrical power to an input of the first switch <NUM>, or to other components of the oxyhydrogen gas generator system <NUM>. The electrical power supply may be one or more of a battery, a fuel cell, a generator or an alternator.

As shown in <FIG>, the oxyhydrogen gas generator system <NUM> may comprise an enclosure <NUM> for housing the one or more components of the oxyhydrogen gas generator system <NUM>, including but not limited to the oxyhydrogen gas generator control system <NUM>, the heater <NUM> and the oxyhydrogen gas generator <NUM>. In some examples the vessel <NUM> containing the fluid supply <NUM> is not enclosed in the enclosure <NUM> so as to facilitate user access to the vessel <NUM>. For example, a user may be required to add further water and/or electrolyte to the vessel <NUM> prior to, or during, operation.

The oxyhydrogen gas generator system <NUM>, when housed in the enclosure <NUM>, may be portable and interchangeable. By being portable, the enclosure <NUM> may be beneficially moved between vehicles to which it may be connected without significant difficulty for a user. The enclosure <NUM> may have a single electrical input connector <NUM> for connection to a power supply. The enclosure <NUM> may have a single gas outlet connector <NUM> for the passage of oxyhydrogen produced by the oxyhydrogen gas generator <NUM> to the air intake of an engine. The electrical input connector <NUM> and gas outlet connector <NUM> may be standard connections, such as a caravan plug and a quick release air coupling. Connection of the electrical input connector <NUM> and gas outlet connector <NUM> is simple and allows quick connection and removal of the oxyhydrogen gas generator system <NUM> at or within a vehicle <NUM>. This provides the benefit of allowing a user to quickly exchange the oxyhydrogen gas generator system <NUM> for another oxyhydrogen gas generator system <NUM>, or to move the oxyhydrogen gas generator system <NUM> between vehicles.

The ambient temperature measuring device <NUM>, or a plurality of ambient temperature measuring devices <NUM>, may be located within the enclosure <NUM>. One or more of the ambient temperature measuring devices <NUM> may be located in an upper portion <NUM> of the interior of the enclosure <NUM>. The interior of the enclosure may be coated or lined with lining <NUM>. The lining <NUM> may be a heat resistant material to create a thermal blanket. The lining <NUM> may also provide sound proofing. The ambient temperature measurement device <NUM> may be configured to measure the ambient temperature within the enclosure <NUM> in which the one or more components of the oxyhydrogen gas generator system <NUM> is housed. The enclosure <NUM> comprises one or more vents, such that the enclosure <NUM> is ventilated to allow transfer of heat between the inside and outside of the enclosure <NUM>. In order to facilitate heat transfer between the interior and exterior of the enclosure <NUM>, the enclosure <NUM> has a series of ventilation apertures <NUM>. A cooling fan <NUM> may be positioned close to the ventilation apertures <NUM> to aid in the exchange of heat from inside the enclosure <NUM> to outside the enclosure <NUM>.

As shown in <FIG>, a vehicle <NUM> may comprise the oxyhydrogen gas generator control system <NUM> and/or one or more of the other components of the oxyhydrogen gas generator system <NUM>. The vehicle <NUM> may be any vehicle which comprises an engine.

The operation of the oxyhydrogen gas generator control system <NUM> is described in the following paragraphs with reference to <FIG>.

At block <NUM>, the controller <NUM> receives output from one or more measurement devices <NUM> as previously described. The received output <NUM> is dependent on the measurement of one or more parameters associated with the oxyhydrogen gas generator system <NUM>.

At block <NUM>, the controller <NUM> controls a first switch <NUM>, to control the operation of the oxyhydrogen gas generator <NUM>, dependent on the value of the one or more measured parameters. As mentioned in the preceding paragraphs the first switch <NUM> may be controlled to be in a first state, to facilitate the provision of electrical power to a first component of the oxyhydrogen gas generator system <NUM>, when the value of each of the one or more measured parameters meet respective first criteria, and controlled to be in a second state, to facilitate prevention of the provision of electrical power to the first component of the oxyhydrogen gas generator system <NUM>, when at least one of the one or more measured parameter values meets a respective second criteria.

The operation of a first example oxyhydrogen gas generator control system <NUM> is described in the following paragraphs with reference to <FIG>, where the first component of the oxyhydrogen gas generator system <NUM> is the oxyhydrogen gas generator <NUM>.

One of the parameters associated with the oxyhydrogen gas generator system <NUM> may be a power level of a power supply, the power supply being configured to supply electrical power to the oxyhydrogen gas generator system <NUM>. The respective first criteria for the power level requires the power level to be at or above a power level threshold and the respective second criteria for the power level requires the power level to be below the power level threshold. The power level threshold may be <NUM> Volts. The power consumption may be bounded, on a 12V battery, to a maximum current drain. The maximum current drain may be between 18A and 28A. The maximum current drain may be 25A.

At block <NUM>, a power supply measurement device <NUM> measures the power level of the power supply, and provides an output <NUM>-<NUM> to the controller <NUM> dependent on a comparison between the measured power level and the power level threshold.

One of the parameters associated with the oxyhydrogen gas generator system <NUM> may be a fluid level of a fluid supply <NUM> for the oxyhydrogen gas generator system <NUM>. The respective first criteria for the fluid level requires the fluid level to be at or above a fluid level threshold and the respective second criteria for the fluid level requires the fluid level to be below the fluid level threshold.

At block <NUM> a fluid level measurement device <NUM> measures the fluid level of a fluid in a fluid supply <NUM> for the oxyhydrogen gas generator system <NUM>, and provides an output <NUM>-<NUM> to the controller <NUM> dependent on a comparison between the measured fluid level and the fluid level threshold.

One of the parameters associated with the oxyhydrogen gas generator system may be a fluid flow rate of a fluid from a fluid supply <NUM> for the oxyhydrogen gas generator system <NUM>. The respective first criteria for the fluid flow rate requires the fluid flow rate to be at or above a fluid flow rate threshold and the respective second criteria for the fluid flow rate requires the fluid flow rate to be below the fluid flow rate threshold.

At block <NUM> a fluid flow rate measurement device <NUM> measures the fluid flow rate of a fluid from the fluid supply <NUM> for the oxyhydrogen gas generator system <NUM>, and provides an output <NUM>-<NUM> to the controller <NUM> dependent on a comparison between the measured fluid flow rate and the fluid flow rate threshold.

One of the parameters associated with the oxyhydrogen gas generator system <NUM> may be an ambient temperature for the oxyhydrogen gas generator system <NUM>. The respective first criteria for the ambient temperature requires the ambient temperature to be at or below an ambient temperature threshold and the respective second criteria for the ambient temperature requires the ambient temperature to be above the ambient temperature threshold.

At block <NUM> an ambient temperature measurement device <NUM> measures the ambient temperature for the oxyhydrogen gas generator system <NUM>, and provides an output <NUM>-<NUM> to the controller <NUM> dependent on a comparison between the measured ambient temperature and the ambient temperature threshold.

At block <NUM>, the controller <NUM> receives output <NUM> from the one or more measurement devices <NUM>. The received output <NUM> is dependent on the measurement of the one or more parameters associated with the oxyhydrogen gas generator system <NUM>.

At block <NUM>, the fluid is circulated to the oxyhydrogen gas generator <NUM> for a process of electrolysis at the oxyhydrogen gas generator <NUM>.

The operation of a second example oxyhydrogen gas generator control system <NUM> is described in the following paragraphs with reference to <FIG>, where the first component of the oxyhydrogen gas generator system <NUM> is a heater <NUM> for heating a fluid in a fluid circulation path of the oxyhydrogen gas generator system <NUM>.

One of the parameters associated with the oxyhydrogen gas generator system <NUM> may be a first fluid temperature measured at a first position in a fluid circulation path of the oxyhydrogen gas generator system <NUM>. The respective first criteria for the first fluid temperature requires the first fluid temperature to be at or below a first fluid temperature threshold and the respective second criteria for the first fluid temperature requires the first fluid temperature to be above the first fluid temperature threshold.

At block <NUM> a first fluid temperature measurement device <NUM> measures the first fluid temperature in the fluid circulation path of the oxyhydrogen gas generator system <NUM>, and provides an output <NUM>-<NUM> to the controller <NUM> dependent on a comparison between the measured first fluid temperature and the first fluid temperature threshold, wherein the first fluid temperature threshold is of a value between <NUM> and <NUM>, or between <NUM> and <NUM>. The first fluid temperature threshold may be <NUM>.

At block <NUM>, the controller <NUM> receives output from the one or more measurement devices <NUM>. The received output <NUM> is dependent on the measurement of the one or more parameters associated with the oxyhydrogen gas generator system <NUM>.

At block <NUM>, the controller <NUM> controls a first switch <NUM>, to control the operation of the oxyhydrogen gas generator <NUM>, dependent on the value of the one or more measured parameters. As mentioned in the preceding paragraphs the first switch <NUM> may be controlled to be in a first state, to facilitate the provision of electrical power to the heater <NUM>, when the value of each of the one or more measured parameters meet respective first criteria, and controlled to be in a second state, to facilitate prevention of the provision of electrical power to the heater <NUM>, when at least one of the one or more measured parameter values meets a respective second criteria. When electrical power is provided to the heater <NUM> then the fluid passing through a housing of the heater <NUM> is heated.

The operation of a third example oxyhydrogen gas generator control system <NUM> is described in the following paragraphs with reference to <FIG>, where the first component of the oxyhydrogen gas generator system is the oxyhydrogen gas generator <NUM>.

One of the parameters associated with the oxyhydrogen gas generator system <NUM> may be a power level of a power supply, the power supply being configured to supply electrical power to the oxyhydrogen gas generator system <NUM>. The respective first criteria for the power level requires the power level to be at or above a power level threshold and the respective second criteria for the power level requires the power level to be below the power level threshold. The power level threshold may be <NUM> Volts. The power consumption may be bounded, on a 12V battery, to a maximum current drain. The maximum current drain may be between 18A and <NUM> A. The maximum current drain may be 25A.

At block <NUM> a fluid flow rate measurement device <NUM> measures the fluid flow rate of a fluid from a fluid supply <NUM> for the oxyhydrogen gas generator system <NUM>, and provides an output <NUM>-<NUM> to the controller <NUM> dependent on a comparison between the measured fluid flow rate and the fluid flow rate threshold.

One of the parameters associated with the oxyhydrogen gas generator system <NUM> may be an ambient temperature for the oxyhydrogen gas generator system <NUM>. The respective first criteria for the ambient temperature requires the ambient temperature to be at or below an ambient temperature threshold and the respective second criteria for the ambient temperature requires the ambient temperature to be above the ambient temperature threshold.

One of the parameters associated with the oxyhydrogen gas generator system may be a first fluid temperature measured at a first position in a fluid circulation path of the oxyhydrogen gas generator system <NUM>. The respective first criteria for the first fluid temperature requires the first fluid temperature to be at or below a first fluid temperature threshold and the respective second criteria for the first fluid temperature requires the first fluid temperature to be above the first fluid temperature threshold.

At block <NUM>, a first fluid temperature measurement device <NUM> measures the first fluid temperature in the fluid circulation path of the oxyhydrogen gas generator system <NUM>, and provides an output <NUM>-<NUM> to the controller <NUM> dependent on a comparison between the measured first fluid temperature and the first fluid temperature threshold, wherein the first fluid temperature threshold is of a value between <NUM> and <NUM>, or between <NUM> and <NUM>. The first fluid temperature threshold may be <NUM>.

At block <NUM>, the controller <NUM> controls a second switch, having a first state and a second state, to control the operation of the oxyhydrogen gas generator <NUM>. The second switch <NUM> is controlled to be in the first state, to facilitate the provision of electrical power to a heater <NUM> for heating a fluid in a fluid circulation path of the oxyhydrogen gas generator system <NUM>, when the value of the first fluid temperature measured at a first position in the fluid circulation path of the oxyhydrogen gas generator system <NUM> is at or below a first fluid temperature threshold. The second switch <NUM> is controlled to be in the second state, to facilitate prevention of the provision of electrical power to the heater <NUM>, when the value of the first fluid temperature measured at the first position in the fluid circulation path of the oxyhydrogen gas generator system <NUM> is above the first fluid temperature threshold. When electrical power is provided to the heater <NUM> then the fluid passing through a housing of the heater <NUM> is heated.

At block <NUM> a second fluid temperature measurement device <NUM> measures a second fluid temperature at a second position in the fluid circulation path of the oxyhydrogen gas generator system <NUM>, and provides an output <NUM>-<NUM> to the controller <NUM> dependent on a comparison between the measured second fluid temperature and the second fluid temperature threshold, wherein the second fluid temperature threshold is of a value between <NUM> and <NUM>, or between <NUM> and <NUM>. The second fluid temperature threshold may be <NUM>. The second position may be different from the first position and may be downstream of the heater <NUM> in the fluid circulation path of the oxyhydrogen gas generator system <NUM>.

At block <NUM>, the controller <NUM> controls a cooler <NUM>, the cooler <NUM> being configured to operate to transfer heat from a fluid in the fluid circulation path when the measured second fluid temperature is above the second fluid temperature threshold.

Heat may be transferred from the fluid in the fluid circulation path to the surrounding air, at least in part, by conduction, and additionally or alternatively may be transferred, at least in part, by convection. The convection may be actuated by a fan which forms at least part of the cooler <NUM>.

At block <NUM>, the fluid is circulated to the oxyhydrogen gas generator for a process of electrolysis at the oxyhydrogen gas generator <NUM>.

Further to the blocks described above in relation to examples of embodiments of the invention, the method may also comprise selectively providing an electrical power supply as an electrical input to the oxyhydrogen gas generator system <NUM> in response to a user input, and providing the electrical power supply as an electrical input for the first switch <NUM>.

Current applied to the plates <NUM> of the oxyhydrogen gas generator <NUM> in an electrolysis process may then produce hydrogen and oxygen gasses. The hydrogen and oxygen gasses may then be passed into the air intake of an associated engine.

The blocks illustrated in <FIG>, <FIG>, <FIG> and <FIG> may represent steps in a method and/or sections of code in the computer program <NUM>. The illustration of a particular order to the blocks does not necessarily imply that there is a required or preferred order for the blocks and the order and arrangement of the block may be varied. Furthermore, it may be possible for some steps to be omitted.

The term "comprise" is used in this document with an inclusive not an exclusive meaning. If it is intended to use "comprise" with an exclusive meaning then it will be made clear in the context by referring to "comprising only one.

The use of the term "example" or "for example" or "may" in the text denotes, whether explicitly stated or not, that such features or functions are present in at least the described example, whether described as an example or not, and that they can be, but are not necessarily, present in some of or all other examples. Thus "example", "for example" or "may" refers to a particular instance in a class of examples.

Claim 1:
A method for control of an oxyhydrogen gas generator (<NUM>) in an oxyhydrogen gas generator system (<NUM>), the method comprising:
receiving (<NUM>) output (<NUM>) from one or more measurement devices (<NUM>), the received output (<NUM>) being dependent on the measurement of one or more parameters associated with the oxyhydrogen gas generator system (<NUM>); and
controlling (<NUM>) a switch (<NUM>), to control the operation of the oxyhydrogen gas generator (<NUM>), dependent on the value of the one or more measured parameters, the switch (<NUM>) having a first state and a second state,
wherein controlling (<NUM>) the switch (<NUM>) comprises:
controlling (<NUM>) the switch (<NUM>) to be in the first state, to facilitate the provision of electrical power to a heater (<NUM>) configured to heat a fluid in a fluid circulation path of the oxyhydrogen gas generator system (<NUM>) which is conveyed to the oxyhydrogen gas generator (<NUM>), when a first fluid temperature measured at a first position in the fluid circulation path of the oxyhydrogen gas generator system (<NUM>) is at or below a first fluid temperature threshold; and
controlling (<NUM>) the switch (<NUM>) to be in the second state, to facilitate prevention of the provision of electrical power to the heater (<NUM>), when the first fluid temperature is above the first fluid temperature threshold.