Patent ID: 6250282
Filing Date: 2001-06-26
Classification: F02D

Abstract:
An idle rotation speed learning control apparatus of an electronically controlled throttle type internal combustion engine, comprising:target opening setting means for setting a target opening of a throttle valve according to a required output of an engine;throttle valve drive means for opening and closing the throttle valve with an actuator so as to obtain said target opening;air quantity learning means for learning and correcting the target opening of the throttle valve so as to obtain a target intake air quantity, by comparing an intake air quantity estimated based on a detection value of the throttle valve opening and an actually detected intake air quantity, at the time of idling the engine;friction learning means for learning and correcting the target opening of the throttle valve so as to obtain a target engine output, while feedback controlling the throttle valve opening so that the engine rotation speed approaches a target idle rotation speed, at the time of idling the engine; andlearning sequence means for performing learning by means of said friction learning means, after learning by means of said air quantity learning means is completed.