| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device for an internal combustion engine capable of accurately controlling an air-fuel ratio of an air-fuel mixture in a combustion chamber by performing the control of a fuel injection amount by using a fuel amount actually contributing to combustion, while taking into account the fuel amount blown back from the combustion chamber to an intake passage.SOLUTION: A remaining ratio Cfw indicating the ratio of remaining fuel without being blown back from a combustion chamber to an intake passage is calculated, a fuel injection amount Tout is calculated using a required fuel amount Tcylf of an engine and the remaining ratio Cfw, and a port fuel injection valve 6P or an in-cylinder fuel injection valve 6C is driven according to the fuel injection amount Tout and fuel injection timing INJOBJ to perform fuel injection. An intake valve actuation phase CAIN is changed, and the remaining ratio Cfw is calculated according to the fuel injection timing INJOBJ and the intake valve actuation phase CAIN. |
