Control Device for Variable Valve Timing Mechanism and Control Method Therefor

A control device for an electric variable valve timing mechanism is provided that can reduce the influence of rotation variations of an engine on a VTC detection angle computation. The control device for a variable valve timing mechanism uses a crank sensor signal and a cam sensor signal of the engine to calculate a rotation phase of the VTC mechanism. A pulse interval of the crank sensor signal is used for a calculation of the rotation phase of the VTC mechanism, and a calculation method of the rotation phase of VTC mechanism is changed depending on the pulse interval of the crank sensor signal determined before the cam sensor signal is input.