Abstract: A fuel injection system for multi-cylinder engine has an ECU for controlling respective fuel injection amount for cylinders. The ECU adjusts each of fuel injection amounts to suppress engine revolution speed change and engine vibration caused by differences of combustion power between cylinders. The vibration suppressing control is carried out on the basis of injection correction amounts that is calculated based on deviation of the engine revolution speed in each engine cylinder. The ECU stores the injection correction amounts in a two-dimensional map defined by a cooling water temperature and a fuel temperature. In the case of an initiation of the control, the ECU looks up the map to obtain an initial value in accordance with a present temperature condition of the engine. It is possible to start or resume the control from a proper level of the injection correction amount.

Abstract: A fuel injection system for multi-cylinder engine has an ECU for controlling respective fuel injection amount for cylinders. The ECU adjusts each of fuel injection amounts to suppress engine revolution speed change and engine vibration caused by differences of combustion power between cylinders. The vibration suppressing control is carried out on the basis of injection correction amounts that is calculated based on deviation of the engine revolution speed in each engine cylinder. The ECU stores the injection correction amounts in a two-dimensional map defined by a cooling water temperature and a fuel temperature. In the case of an initiation of the control, the ECU looks up the map to obtain an initial value in accordance with a present temperature condition of the engine. It is possible to start or resume the control from a proper level of the injection correction amount.