JPS6469751A - Learning controller for internal combustion engine - Google Patents

Abstract

PURPOSE:To control the air-fuel ratio and idle revolution speed on ascending and descending a slope by correcting the indiscriminate learning correction coefficient and learning correction coefficient for each area, etc., according to the result of the detection of a prescribed operation region and permitting the speedy learning for the variation of the air density. CONSTITUTION:A fuel injection quantity calculating means H which calculates the fuel injection quantity on the basis of each output of a fundamental fuel injection quantity setting means C, indiscriminate learning correction coefficient memory means D, learning correction coefficient searching means for each area F, and a feedback correction coefficient setting means G is installed. When a detecting means J detects a prescribed region in which the intake air flow rate is not changed for the opening degree variation of a throttle, a correcting means K corrects the deviation for the standard value of the feedback correction coefficient by the indiscriminate learning correction coefficient, while if the prescribed region is not detected, a correcting means L corrects the learning correction coefficient for each area. In the deceleration operation, a correcting means O corrects the indiscriminate learning correction coefficient according to the output of a deceleration rate calculating means N.