VALVE TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To improve emission and fuel consumption by a VVT (a valve timing control mechanism) and to prevent the occurrence of rush to a misfire region by suppression of rapid acceleration. SOLUTION: In this device, simultaneously with closing of a power source, after initialization by a step S100, answer performance of a VVT is estimated by the operation state of an internal combustion engine at a step S200. At a step S300, the relative rotation angle of the VVT is controlled and at a step S400, a throttle correction gain to correct the opening of a throttle valve in a manner to match with answer performance of the VVT is computed. At a step S500, a throttle valve is controlled. Since when answer performance of the VVT is lowered, the opening of the throttle valve is corrected and controlled based on answer performance thereof, whereby effectiveness of the VVT is drawn to a maximum limit and emission and fuel consumption are improved, and by suppression of rapid acceleration, rush to a misfire area is prevented from occurring.