Patent ID: 7461634

Claim:
A fuel injection amount correction method for a pressure boosting fuel injection apparatus including i) a common rail that stores fuel having a predetermined pressure and supplies the fuel to a fuel injection valve; ii) a pressure boosting device that increases the pressure of the fuel to be supplied to the fuel injection valve from the common rail to a boosted pressure that is higher than the predetermined pressure; and iii) a first controller that opens the fuel injection valve and causes the fuel injection valve to inject the supplied fuel, the pressure boosting fuel injection apparatus controlling a fuel injection characteristic of the fuel injection valve by adjusting a difference between operation starting timing of the pressure boosting device and operation starting timing of the first controller when the pressure boosting device is in an operated state, the fuel injection amount correction method comprising the steps of: causing the first controller to be operated so as to perform fuel injection when the pressure boosting device is in the non-operated state; and correcting the fuel injection amount of the fuel injection valve when the fuel injection is performed based on a deviation between the actual fuel injection amount and a target fuel injection amount while the pressure boosting device is in the non-operated state.