Patent ID: 7599783

Claim:
An injection quantity control unit for controlling an injection quantity of a plurality of fuel injection valves, respectively, wherein each of the plurality of fuel injection valves injects fuel into a corresponding one of cylinders of a multi-cylinder internal combustion engine, the unit comprising: a rotational speed obtaining means for obtaining a rotational speed of the engine; an integration value calculating means for calculating an integration value of the rotational speed, which is equal to or more than a predetermined rotational speed, in an explosion stroke of each of the cylinders; and a correcting means for correcting the injection quantity of the plurality of fuel injection valves based on the integration value of each of the cylinders so as to reduce variation in a rotational speed variation among the cylinders, wherein the rotational speed variation is a difference between a maximum rotational speed in the explosion stroke of each of the cylinders and a minimum rotational speed at a starting time of the explosion stroke of each of the cylinders.