Patent ID: 6112716
Filing Date: 2000-09-05
Classification: F02D,F02P,Y02T

Abstract:
A fuel injection control system for an internal combustion engine of a cylinder injection type, wherein fuel is injected directly into a cylinder through a fuel injection valve, comprising:engine start detecting means for detecting starting of said internal combustion engine;temperature detecting means for detecting a temperature of said engine;engine low-temperature state detecting means for detecting whether said engine is in a cold state by comparing a detected value derived from an output of said temperature detecting means with a predetermined value stored previously; andcontrol means for controlling said fuel injection valve so as to effectuate one of an expansion-stroke fuel injection during an expansion stroke and an exhaust-stroke fuel injection during an exhaust stroke, for a predetermined time period after a start of the fuel injection, provided that starting of said internal combustion engine is detected from an output of said engine start detecting means and that a low-temperature state of said engine is detected from an output of said engine low-temperature state detecting means;wherein said control means performs said one of expansion-stroke fuel injection and said exhaust-stroke fuel injection during a time period which is required for a value resulting from integration of output values of the fuel injection quantity control signal to attain a predetermined accumulated value.