Control apparatus and method for an internal combustion engine installed in a vehicle

摘要

A Vehicle-installed internal combustion engine control apparatus and method for maintaining a good operating condition of the internal combustion engine(12) even if the opportunity of control learning is limited is disclosed. To adjust the closed-state opening of a throttle valve(29), that is, opening of the throttle valve(29) under a non-load condition, feedback control of the opening of the throttle valve(29) is performed so that the idle speed approaches a target revolution speed, while the non-load idling of the engine(12) is being performed. A feedback correction amount for the feedback control is stored as a learned value. The learned correction value is reflected in the next and later operations of the closed-state opening control of the throttle valve(29), so that a proper closed-state opening of the throttle valve(29) is set. During the learning of the feedback correction amount, the engine(12) is inhibited from being stopped.