Patent ID: 6073610
Filing Date: 2000-06-13
Classification: F02D

Abstract:
A control apparatus of an internal combustion engine equipped with an electronic control device that electrically drives a throttle valve disposed in an intake passage by means of an actuator, comprising;failure detecting means for detecting a failure of said electronic control device to properly drive said throttle valve; andcontrol means for adjusting a function of the engine to provide optimal engine operation based on the type of failure detected by the failure detecting means,wherein, when the failure detected by the detecting means is indicative of a stuck open throttle valve, the control means performs at least one of limiting a fuel injection system of the engine to a lean burn mode, stopping the fuel supply to at least one cylinder of the engine, turning an exhaust gas recirculation valve off, and stopping selected engine drive accessories;wherein, when the failure detected by the detecting means is indicative of an open throttle valve and an engine speed in excess a predetermined maximum engine speed, the control means stops all fuel supply to the engine; andwherein, when the failure detected by the detecting means is indicative of a stuck closed throttle valve, the control means inhibits the fuel injection system of the engine to the lean burn mode.