Patent ID: 6722345
Filing Date: 2004-04-20
Classification: F02D

Abstract:
A fuel injection system for an internal combustion engine for carrying out a multi-injection to inject a fuel into a cylinder of the engine in a plurality of times by calculating an electricity conduction time period of an injector drive signal for an injector from a command injection amount and a fuel pressure set in accordance with an engine operating condition, controlling an opening time period of the injector in accordance with the calculated electricity conduction time period of the injector drive signal and carrying out electricity conduction to the injector by a plurality of times during a compression stroke and an expansion stroke of the engine, the fuel injection system comprising:(a) correction data storing means for storing a correction data formed by calculating a relationship among a combustion chamber pressure, the engine operating condition and an injection mode of a preceding injection influencing on an actual injection start timing of a succeeding injection carried out successively to the preceding injection carried out precedingly in carrying out the multi-injection previously by an experiment; (b) operating condition detecting means for detecting the engine operating condition; (c) injection mode detecting means for detecting or calculating the injection mode of the preceding injection; and (d) electricity conduction time period correcting means for correcting the electricity conduction time period of the injector drive signal for the succeeding injection based on the correction data stored by the correction data storing means, the engine operating condition detected by the operating condition detecting means and the injection mode of the preceding injection.