Patent ID: 7721709

Claim:
A fuel injection control apparatus for an internal combustion engine which is supplied with a fuel by an in-cylinder fuel injection vale for injecting the fuel into a cylinder, and a port fuel injection valve for injecting the fuel into an intake system including an intake port, said apparatus comprising: required in-cylinder injection amount calculating means for calculating a required in-cylinder injection amount required for said in-cylinder fuel injection valve; required port injection amount calculating means for calculating a required port injection amount required for said port fuel injection valve; in-cylinder injected fuel behavior parameter calculating means for calculating an in-cylinder injected fuel behavior parameter indicative of a transport behavior of a fuel injected by said in-cylinder fuel injection valve, the transport behavior including a transport delay due to the sticking of the fuel injected from the in-cylinder fuel injection valve onto inner wall surface of the combustion engine; port injected fuel behavior parameter calculating means for calculating a port injected fuel behavior parameter indicative of a transport behavior of the fuel injected by said port fuel injection valve, the transport behavior including a transport delay due to the sticking of the fuel injected from the port fuel injection valve onto inner wall surface of the intake port; net in-cylinder injection amount determining means for determining a net in-cylinder injection amount which should be injected from said in-cylinder fuel injection valve in accordance with the calculated in-cylinder injected fuel behavior parameter and port injected fuel behavior parameter based on the calculated required in-cylinder injection amount; and net port injection amount determining means for determining a net port injection amount which should be injected from said port fuel injection valve in accordance with the in-cylinder injected fuel behavior parameter and the port injected fuel behavior parameter based on the calculated required port injection amount.