FUEL SUPPLY DEVICE OF LIQUEFIED GAS-INTERNAL COMBUSTION ENGINE, TO REDUCE COST AND INFLUENCE OF HEAT GENERATION THROUGH REDUCTION OF NUMBER OF ELECTRONIC SHUTOFF VALVES

摘要

PURPOSE: A fuel supply device of a liquefied gas-internal combustion engine is provided to reduce the cost and influence of heat generation by reducing the number of electronic shutoff valves and to reduce the making cost of an operation logic by simplifying the operating order of an electromotive fuel pump, a fuel injection valve, and the electronic shutoff valve. CONSTITUTION: A fuel supply device of a liquefied gas-internal combustion engine has a fuel supply pipe for supplying liquefied gas fuel to fuel injection valves(12) from a fuel tank(10) and a fuel return pipe(29) for returning the rest of the liquefied gas fuel to the fuel tank. A fuel pump(15) is installed to the fuel supply pipe. A fuel surge valve(32) is installed to the fuel return pipe. A check valve(20) for allowing just a flow of the liquefied gas fuel from the fuel tank to the fuel pump is installed to a low-pressure fuel supply pipe(13) between the fuel tank and the fuel pump. An electronic shutoff valve(23) is installed to a high-pressure fuel supply pipe(14) between the fuel pump and a fuel rail(11). Plural fuel injection valves are connected to the fuel rail.