DEVICE FOR CONTROLLING AIR/FUEL RATIO OF MULTI-CYLINDER INTERNAL COMBUSTION ENGINE

摘要

Provided is an air/fuel ratio control device which executes feedback control of the air/fuel ratio according to an output of a sensor for detecting the air/fuel ratio of an exhaust gas in a multi-cylinder internal combustion engine having a throttle valve and open valve characteristic control means. The multi-cylinder internal combustion air/fuel control device can execute an accurate air/fuel ratio control. In the feedback control, the relationship between the output of the sensor and the feedback value is corrected according to the feedback learning correction value learned and decided according to the output of the sensor which is executing the feedback control. When learning and deciding a new feedback learning correction value, the intake amount is controlled only by the throttle vale.