Patent ID: 6997167
Filing Date: 2006-02-14
Classification: F02D,Y02T

Abstract:
1. A fuel injection control system for an engine having injection amount arithmetical operation means for arithmetically operating a basic injection amount relative to an intake air amount estimated from an intake pipe pressure of the engine and various control conditions and injector drive means for driving an injector so as to inject from said injector a fuel which amount is determined based on said basic injection amount, which comprises: a signal generator which generates a reference crank angle signal at a reference crank angle position which is a specific crank angle position of said engine, and accelerating/decelerating state detection means which: samples an intake pipe pressure of the engine at each sample timing which comes every time a very short time is passed from a timing at which said reference crank angle signal is generated; detects an intake pipe pressure difference which is a difference between the intake pipe pressure sampled at each sample timing and an intake pipe pressure sampled at the corresponding sample timing one combustion cycle before; and detects whether said engine is in an accelerating state or in a decelerating state when said intake pipe pressure difference exceeds a set value, wherein said injector drive means is constituted so as to determine the amount of fuel injected from said injector by correcting said basic injection amount to be matched with the detected state, when the accelerating state is detected and/or when the decelerating state of the engine is detected by said accelerating/decelerating state detection means.