Patent ID: 7000600
Filing Date: 2006-02-21
Classification: F02D,Y02T

Abstract:
1. A fuel injection control apparatus for an internal combustion engine equipped with a fuel injection valve for directly injecting high pressure fuel supplied by high pressure fuel supply means into a cylinder, comprising: in-cylinder pressure detection means for detecting or estimating in-cylinder pressure of said cylinder; time period calculation means for calculating fuel injection time period over which fuel is injected from said fuel injection valve, the fuel injection time period being corrected to compensate a variation in the fuel injection quantity caused by a variation in the fuel injection rate due to a variation in the in-cylinder pressure detected or estimated by said in-cylinder pressure detection means relative to a reference in-cylinder pressure that is stored in advance; start time variation calculation means for calculating a variation in the fuel injection start time at the in-cylinder pressure detected or estimated by said in-cylinder pressure detection means relative to the fuel injection start time at said reference in-cylinder pressure; control means for controlling the time period over which fuel is injected from said fuel injection valve based on the fuel injection time period calculated by said time period calculation means and the variation in the fuel injection start time calculated by said start time variation calculation means.