METHOD AND SYSTEM FOR FEEDING FUEL, ESPECIALLY ALCOHOL OR ITS MIXTURES, INTO ENGINE

Abstract: The subject of the invention is a method of feeding engine with fuel, especially with alcohol or its mixtures. The method of feeding engine with fuel consists in that alcohol or its mixtures, having the ambient temperature, is delivered to a converting unit which, by means of the thermal energy contained in combustion products of the engine, is heated up to the boiling point of the alcohol or its mixtures, preferably up to the temperature of 140 DEG C, and from there the gas emitted by the alcohol, through pipes, preferably thermally insulated and a control valve functionally coupled with an atmospheric air throttling valve, is, after having been most favourably mixed with air, fed into the combustion chamber of the engine. The system for feeding engine with fuel consists of a tank (1) connected by means of fuel pipes (2) with a feeding unit (3) which delivers fuel to a converting unit (4). As a result of the heating-up of the liquid fuel in the converting unit (4) gas is emitted, which, down thermally insulated pipes (5) is transferred to a mixing unit (6), and from there, after having been properly mixed with air, is fed into the engine (7), where its ignition takes place.

Description: METHOD AND SYSTEM FOR FEEDING FUEL, ESPECIALLY ALCOHOL OR ITS MIXTURES, INTO ENGINE The subject of the present invention is a method of feeding engine with fuel, especially with alcohol or its mixtures, and a system for feeding fuel, especially alcohol or its mixtures into engine, used, in particular, in combustion engines of automotive vehicles. Methods of feeding engines, especially motor-car engines with fuel in the form of propane-butane gases mixture are known in which, gas contained under high pressure in a tank and having in these circumstances the from of liquid, undergoes expansion in a pressure reducing system, in consequence of which, the change of its form from liquid into gaseous one takes place. The fuel in this form is then mixed with air in a proper proportion and fed into the combustion chamber of a conventional combustion engine, where its internal energy is changed into mechanical energy. The disadvantage of the feeding of combustion engines with fuel in the form of propane-butane gases is, that it requires double fuel supplying systems to be used one part of which, most often a petrol one, serves for starting the cold engine, whereas the other one can only start working at the moment when the proper temperature of the engine, making it possible for the liquid propane-butane gas to change its form into the gaseous one, is ensured. The liquid state of aggregation of propane-butane gas requires using high-pressure gas vessels, which, in case of a collision of a vehicle equipped with such installation, seriously endanger their surroundings. Also combustion engines, especially automobile ones are known which are fed with mixtures of petrols and ethyl alcohol, the latter constituting an addition, amounting to about 8% of the whole volume of the mixture. The disadvantage of such method of feeding combustion engines with petrols and ethanol mixtures consists in that there is a limit of ethanol content in this fuel which, virtually, does not exceed 8% of the whole volume of the mixture. The amount of ethanol is restricted by the standards concerning the content of oxygen compounds in petrols. These compounds must not be used in concentrations exceeding that value, neither can they be chosen at will, as there is a parameter restricting the total use of these chemical compounds, namely the maximum content of chemically bound oxygen contained in petrol, which, in case of polish petrols, amounts to 2.8% of the mass of O 2 . The method of feeding engine with fuel, especially with alcohol or its mixtures, according to this invention consists in that the alcohol or its mixtures, having the ambient temperature, is delivered to a converting unit which is heated up to a temperature higher than the boiling point of alcohol, preferably up to the temperature of 140° C, from where the alcoholic gas, generated in the converting unit is, through pipes, preferably thermally insulated, and a control valve, functionally coupled with an air throttling valve, fed, after having been most favourably mixed with air, into the engine combustion chamber. The system for feeding engine with fuel, especially with alcohol or its mixtures, consisting of a tank, fuel pipes, a fuel system and an engine is charactreized by the fact that, between the tank and the engine, it has a converting unit connected with a mixing unit. The advantage of the feeding of engine according to this invention is the possibility of feeding combustion engine with any kind of fuel based on alcohol or its mixtures, without any addition of petrols, including the feeding with alcohol comprising an addition of water. The structure of an engine fed in this way does not undergo any constructional modifications, and the changes which are necessary, only concern its feeding system. The combustion products of an engine fed in this way contain very small quantities of pollutants harmful to natural environment and the changeover to this type of fuels itself will make it possible to eliminate emission of CO in combustion gas, to lessen air pollution with hydrocarbons and to eliminate lead from combustion gas. Example. The method of feeding engine with fuel, especially with alcohol or its mixtures, can be realized by a system equipped with a liquid alcohol tank, from which the alcohol, having the ambient temperature is sucked by a feeding unit and delivered to a converting unit which is heated up to the temperature necessary for the alcohol to change from its liquid form into the gaseous one. As a result of the heating-up the alcohol emits gas, which, down insulated pipes, through a control valve interconnected with an atmospheric air throttling valve, is transferred to a mixing unit, mixed with air in a proper proportion, and fed into the combustion chamber of a combustion engine, where its ignition, brought about by means of traditional methods, causes the working stroke of the piston of the engine. The subject of this invention, concerning the system for realizing the method is presented, in the form of an example of its embodiment, by a drawing, in which the system of feeding fuel, especially alcohol or its mixtures, into an engine has been shown diagrammatically. As it has been shown in the drawing, the system consists of a tank connected, by means of fuel pipes 2, with a feeding unit 3 which delivers fuel to a converting unit 4. As a result of the heating-up of the liquid fuel in the converting unit 4, gas is emitted which, down thermally insulated pipes 5 flows to a mixing unit 6, from where, after having been properly mixed with air, it is fed into an engine 7, where its ignition takes place.

Claims: Patent claims 1. Method of feeding fuel, especially alcohol or its mixtures into engine, characterized by the fact, that alcohol or its mixtures, having the ambient temperature, is supplied to a converting unit heated up to a temperature higher than the boiling point of the alcohol or its mixtures, preferably up to the temperature of 140 ° C, from where, through pipes, preferably thermally insulated, and a control valve functionally coupled with an atmospheric air valve, the alcoholic gas, generated in the converting unit, after having been most favourably mixed with air, is fed into the combustion chamber of an engine. 2. System for feeding engine with fuel, especially with alcohol or its mixtures, consisting of a tank, fuel pipes, a feeding unit and an engine, charakterized by the fact, that between the tank (1) and the engine (7) there is a converting unit (4), connected with a mixing unit (6).

Inventors: DOSCH GUENTHER, JAKUBOWSKI EDWARD, JAKUBOWSKI ZENON, SOCHA ADAM, STUMPF MANFRED, DOSCH, GUENTHER, JAKUBOWSKI, EDWARD, JAKUBOWSKI, ZENON, SOCHA, ADAM, STUMPF, MANFRED
Applicants: DOSCH GUENTHER, JAKUBOWSKI EDWARD, JAKUBOWSKI ZENON, SOCHA ADAM, STUMPF MANFRED, DOSCH, GUENTHER, JAKUBOWSKI, EDWARD, JAKUBOWSKI, ZENON, SOCHA, ADAM, STUMPF, MANFRED
Application year: 1997
Main classification: F02M31
IPC codes: F02M31