Patent ID: 7395146

Claim:
A fuel injection control apparatus for an internal combustion engine, which determines a fuel injection amount for startup in accordance with predefined operating conditions, the apparatus comprising: storage means for storing the relationship between a condition value for the operating conditions and an optimum fuel injection amount that is determined by using as an index a predefined physical quantity related to the operating performance of the internal combustion engine; condition value acquisition means for acquiring the condition value for the operating conditions when the internal combustion engine starts up; fuel injection amount setup means, which, when the acquired condition value is one of a plurality of reference condition values for which optimum values are predetermined, sets an optimum value predetermined for the reference condition value as a fuel injection amount, and when the acquired condition value is other than the reference condition values, sets as a fuel injection amount an interpolated value that is interpolation-calculated by using the relationship between the reference condition values and the optimum values; and interpolated value correction means, which, when the acquired condition value is other than the reference condition values so that the interpolated value is used as the fuel injection amount, determines the value of the predefined physical quantity prevailing when fuel is injected in accordance with the interpolated value, and corrects the interpolated value in accordance with a difference between a target value of the predefined physical quantity and an actual value of the predefined physical quantity.