Injection quantity control unit and fuel injection system having the unit
AssigneeDenso Corporation
InventorNoriaki Nakane
Life of this patent
Estimating the term…
Abstract
An injection quantity control unit controls an injection quantity of a plurality of fuel injection valves, respectively. The unit includes a rotational speed obtaining device for obtaining a rotational speed of the engine, an integration value calculating device 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 device 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.
Claims6
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.
Dependencies are inferred from the claim text.