The Welsh Technologies Multi-Fuel System is a patented alternate fuel system that utilizes a measured quantity of gaseous alternate fuel simultaneously with the existing use of liquid fuels such as gasoline or diesel. The Multi-Fuel System is defined as a 'DUAL FUEL' alternate fuel system that converts the vehicle to an alternate fuel vehicle enabling the vehicle to obtain federal and state incentives and to meet federal alternate fuel fleet guidelines and mandates. Since the fuel reservoir is so small there is little or no effect on the vehicle's cargo capacity and virtually no safety concern of additional fuel storage. The Multi-Fuel System Controller is installed in the engine compartment. The Controller utilizes solid state electronic management to vaporize, treat, and control the gaseous fuel with triple redundant safety controls and without utilizing any external heat from the engine's cooling system or electrical heat to vaporize the gaseous fuel.
Liquid fuel is injected into the cylinder as it was before.
Under the compression cycle, the air mixed with the gaseous fuel heats to hotter temperatures due to the alternate fuels higher 'heat of vaporization'. The increased temperatures during the compression causes the liquid fuel to stay in a gaseous state and forces more droplets of liquid fuel to vaporize and volatilize. Ignition, as previously, is accomplished by a spark plug in a gasoline engine and automatically as diesel fuel is injected in a diesel engine. Although the gaseous alternate fuel should increase the temperature of combustion of the fuel mixture over dedicated liquid fuel combustion, this has not been measurable and is believed to be negligible. Since the liquid fuel is virtually vaporized and volatilized pre-combustion and since combustion is more rapid and complete there is one explosion, consuming the fuel and releasing its energy.