AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To improve control precision of air-fuel ratio feedback control for calculating a feedback control amount based on parameter of calculated plant model by identifying from a fuel injection means to an air-fuel ratio detection means as the plant model. SOLUTION: An air-fuel ratio learned value UL and various compensation amounts UK by water temperature are added to the feedback control amount outputted from a sliding mode control part (S/M control part) 221 and are inputted into a plant model identification part 223 to prevent the influence of air-fuel ratio learning and water temperature compensation in order to perform stable and highly precise control. COPYRIGHT: (C)2003,JPO