AIR/FUEL RATIO LEARNING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To perform air/fuel ratio control by fuel injection for reflecting aging of an internal combustion engine even at an area other than an O2feedback area. SOLUTION: In the air/fuel ratio learning control device for the internal combustion engine, the control unit for controlling an injection amount of fuel determines a basic injection amount of fuel for setting an air/fuel ratio to a target air/fuel ratio based on a throttle opening and an engine rotational speed and independently performs the fuel injection control in every load area including a plurality of O2feedback areas, while obtaining the injection amount of fuel without depending on at least the suction pressure and the atmospheric pressure by multiplying feedback correction coefficient determined according to a detection value of an oxygen sensor and correction coefficient responding to the aging determined in every engine load to the basic fuel injection amount, while learning to vary according to the aging of the internal combustion engine. The control unit controls the injection amount of fuel at the load area other than the O2feedback area using a learning value of the O2feedback area adjacent to the load area. COPYRIGHT: (C)2011,JPO&INPIT