Patent ID: 7747377
Filing Date: 2010-06-29
Classification: F02D,F02M,Y02T

Abstract:
1. A fuel injection control device for a fuel supply system that injects fuel to an inside of a cylinder as a part of a target engine for performing fuel combustion, an intake passage of the engine or an exhaust passage of the engine with a predetermined injector, the fuel injection control device comprising: a fuel pressure sensing means for sequentially sensing fuel pressure fluctuating with the injection of the injector; an injection centroid detecting means for detecting an injection centroid as a geometric centroid of a diagram as a profile of a transition of an injection rate at a present time based on a transition of the fuel pressure sequentially sensed by the fuel pressure sensing means, the injection rate being equivalent to a fuel quantity injected from the injector per unit time; and an injection varying means for varying an injection command to the injector or an injection condition of the injector based on the injection centroid detected by the injection centroid detecting means and an injection centroid of a predetermined basic diagram such that a relative positional relationship between the injection centroid of the diagram as the actual profile of the injection rate transition and the injection centroid of the basic diagram becomes a predetermined relationship.