ENGINE IDLE REVOLUTION NUMBER LEARNING CONTROLLER

摘要

PROBLEM TO BE SOLVED: To prevent a sudden increase or a drop in engine revolution caused by mistaken learning by making more optimal a limit to the renewal of a learning correction amount. SOLUTION: Upper and lower limit values A and B are set by adding/ subtracting specified values L1 and L2 to or from a learning correction value ISCLR when an engine key switch is turned ON (S21 to S22). Under a specified learning condition, based on a deviationΔISCI between the average value ISCIave of a feedback control amount and a target feedback control amount ISCIset , the learning correction amount ISCLRC is renewed (S24 to S28) and the learning correction amount ISCLRC after the renewal is regulated between the upper and lower limit values A and B (S29 to S32) and then rewritten (S33).