Patent ID: 7013873

Claim:
A fuel injection controlling apparatus for an internal combustion engine, the engine including a cylinder and a plurality of fuel injection valves for supplying fuel to a combustion chamber of the cylinder, the apparatus comprising: a switching section, wherein, when fuel is supplied to the combustion chamber from at least two of the fuel injection valves, the switching section switches the ratio of the fuel injection amount of each of the at least two fuel injection valves to the total fuel injection amount of the at least two fuel injection valves according to the operating state of the engine; a computing section, wherein, when fuel is supplied to the combustion chamber from the at least two fuel injection valves such that the ratio of the fuel injection amount of one of the at least two fuel injection valves to the total fuel injection amount of the at least two fuel injection valves seeks a predetermined value, the computing section computes a correction value for compensating for a deviation of the actual air-fuel ratio in relation to a target air-fuel ratio, wherein the predetermined value is switched among a plurality of different numeric values the number of which is equal to the number of the fuel injection valves; and a correcting section that corrects the fuel injection amount of at least one of the at least two fuel injection valves based on the numeric values and correction values, wherein each of the correction values is computed by the computing section when the predetermined value is a corresponding one of the numeric values.