CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE WITH FUEL INJECTION VALVE DIAGNOSIS MEANS

摘要

A control device of an internal combustion engine having a fuel injection valve injecting fuel directly into a cylinder and capable of preventing exhaust gas components from being deteriorated by a regenerating processing or eliminating the unnecessary replacement of part despite the fact that the characteristics of the injection valve are within the normal range if the accuracy for detection of abnormality of the fuel injection valve is low when the abnormality of the fuel injection valve is detected, wherein the ratio of an air rate to a fuel rate fed to each cylinder is controlled to a specified value by regulating the fuel injection amount; the control device further comprising a fuel injection diagnosis means diagnosing the abnormality of the fuel injection valve based on the compensation amount of fuel injection amount and a variation in rotation of the internal combustion engine.