Patent ID: 6227163
Filing Date: 2001-05-08
Classification: F02B,F02D,Y02T

Abstract:
A fuel injection control system for a cylinder injection type internal combustion engine, comprising:various types of sensor means for detecting operation states of an internal combustion engine;fuel injector means for injecting fuel directly into a cylinder of said engine;cylinder-charged intake air quantity detecting means for detecting cylinder-charged intake air quantity information corresponding to an intake air quantity charged in the cylinder of said engine on the basis of intake air quantity information derived from outputs of said sensor means;combustion mode control means for setting one of combustion modes of said engine in dependence on said operation states thereof;desired air-fuel ratio control means for setting one of desired air-fuel ratios which differ in dependence on said combustion modes;desired intake-air quantity control means for setting one of desired intake air quantities which differ in dependence on said combustion modes;fuel injection quantity control means for setting a fuel injection quantity for said fuel injector means so that said one desired air-fuel ratio is realized;throttle valve control means for setting a throttle valve opening degree of said engine so that said one desired intake air quantity is realized; andcombustion mode changeover means for changing over said combustion modes in dependence on said operation states,wherein said fuel injection quantity control means includes:combustion-mode-changeover-oriented fuel injection quantity control means for modifying said fuel injection quantity so that change thereof assumes reverse phase relative to a change of said cylinder-charged intake air quantity information upon changeover of said combustion modes.