DUAL-FUEL SYSTEM FOR INTERNAL COMBUSTION GAS ENGINE Russian patent published in 2003 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: invention can be used in dual-fuel supply systems of gas engines to provide simultaneous operation of engine on gasoline or gaseous fuel. proposed dual-fuel system contains two-step gas pressure regulator furnished with main electromagnetic valve and electromagnetic gas valve, carburetor-mixer consisting of body divided into primary and secondary chambers, float chamber, gasoline supply main metering system, electronic control unit and kind-of-fuel selector. Additional electromagnetic valve installed into main metering system of primary chamber makes it possible to cut off gasoline supply. Gasoline idling system is provided with additional electromagnetic valve making it possible to disconnect gasoline delivery into idling system. Gas nozzle is installed only in primary chamber. Float chamber is in direct communication with gasoline tank. Kind-of- fuel selector is connected with electromagnetic valve in main metering system of primary chamber of mixer-mixer and is connected, through override duty economizer control unit, with electromagnetic valve in gasoline idling system. Electronic unit is connected with kind-of fuel selector, main electromagnetic valve and electromagnetic gas valve. Invention makes it possible to use gaseous fuel in engine which is less expensive. EFFECT: improved service characteristics of supply system of gas internal combustion engine. 1 dwg