FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a fuel injection system having a simple construction for achieving fuel injection with high control accuracy even when vapor occurs.

SOLUTION: The fuel injection system comprises a liquid phase LPG supply system 31 for supplying liquefied fuel gas stored in a fuel tank 30 to a liquid spray injector 21 in a liquid phase condition, and a gas phase LPG supply system 32A for supplying the liquefied fuel gas stored in the fuel tank 30 to a gas phase fuel injection means 22B in a gas phase condition. On the midway of a gas phase LPG supply pipe 320 as part of the gas phase LPG supply system 32A, a relief valve 321 is provided where a direction from the side of the fuel tank 30 toward the side of the gas phase fuel injection means 22B is set as a forward direction. An ECU 6 selects the opening/closing of the liquid spray injector 21 and the gas phase fuel injection means 22B, and uses the gas phase fuel injection means 22B for correcting injection during the injection of the liquid injector 21 at starting.

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