Control apparatus and control method for vehicle-mounted internal combustion engine

摘要

A vehicle-mounted internal combustion engine has a variable lift mechanism for varying the valve lift of an intake valve. During deceleration of the vehicle, an ECU performs fuel cutoff control for temporarily stopping supply of fuel to the engine. During the fuel cutoff control, the ECU performs throttle opening increase control as necessary to set the opening degree of a throttle valve greater than a usual target opening degree that is set when an acceleration pedal is not depressed. If the throttle opening increase control is being performed when resumption of the fuel supply is required during the fuel cutoff control, the ECU controls the variable lift mechanism such that the valve lift is reduced compared to a situation where the throttle opening increase control is not being performed.