GAS FUEL FEEDER OF INTERNAL COMBUSTION ENGINE

A gas fuel supply device for an internal combustion engine adapted to vaporize liquid fuel in an fuel tank 2 into a gas fuel and supply the gas fuel to a fuel injection valve 4, the gas fuel supply device comprising: a vaporizer 11 interposed in a fuel supply pipe 6 for vaporizing the liquid fuel; a gas fuel pressure sensor 37 for detecting the gas fuel pressure on the downstream side of the vaporizer 11; and an ECU 35 (throttle opening control means) for limiting the maximum opening of a throttle valve according to the gas fuel pressure detected by the gas fuel pressure sensor 37.