Patent ID: 6729297
Filing Date: 2004-05-04
Classification: F02D,F02M,Y02T

Abstract:
A fuel injection control device comprising a reservoir storing high pressure fuel and a fuel injection valve connected to the reservoir which injects fuel stored in the reservoir into a combustion chamber of an internal combustion engine, the device executing a pilot fuel injection by injecting fuel into the combustion chamber prior to a main fuel injection, wherein the device further comprises:fluctuation detecting means for detecting a magnitude of the fluctuation of pressure caused by the pilot fuel injection in fuel supplied to the fuel injection valve; correction means for calculating a magnitude of change in pilot fuel injection characteristics of the fuel injection valve from standard fuel injection characteristics based on the magnitude of the pressure fluctuation detected by the fluctuation detecting means and for correcting the amount of the pilot fuel injection based on the change in the pilot fuel injection characteristics in such a manner that the actual amount of fuel injected by the pilot fuel injection agrees with a target pilot fuel injection amount.