Patent ID: 6988487

Claim:
A fuel injection control device of an internal combustion engine comprising: fuel injection valves which directly inject fuel in the inside of combustion chambers of an engine; fuel injection valve control means which performs a driving control of the fuel injection valves by calculating a fuel injection amount which brings a target air fuel ratio which is preliminarily set in response to an engine operation state; a pressure storage chamber which is connected with the fuel injection valves and stores high-pressure fuel; a fuel pressure sensor which detects a fuel pressure in the inside of the pressure storage chamber; a high-pressure pump which pressurizes fuel transported from a fuel tank in the inside of a pressurizing chamber and supplies the high-pressure fuel to the pressure storage chamber; a discharge amount control valve which controls a fuel amount supplied from the high-pressure pump to the pressure storage chamber; and fuel pressure control means which performs a feedback control of a discharge amount control valve such that the fuel pressure in the inside of the pressure storage chamber detected by the fuel pressure sensor agrees with a target fuel pressure which is set in response to the engine operation state, wherein the fuel injection control device includes forced fuel injection control means which, when the fuel pressure in the inside of the pressure storage chamber assumes a given pressure state during a fuel cut control using the fuel injection valve control means, gives a driving instruction to the fuel injection valve control means to interrupt the fuel cut control and enables forced driving of the fuel injection valves of given cylinders with a fuel injection amount corresponding to the engine operation state.