Control apparatus of valve opening/closing timing control mechanism

A control apparatus of a valve opening/closing timing control mechanism configured by including

• a driving side rotating body configured to rotate synchronously with rotation of a crankshaft of an internal combustion engine;
• a driven side rotating body configured to rotate integrally with a camshaft for opening or closing of a valve that opens or closes a combustion chamber;
• a stopper unit configured to determine a mechanical operation limit on a most retarded angle side and a mechanical operation limit on a most advanced angle side of the driven side rotating body with respect to the driving side rotating body;
• and
• an electric motor configured to control a relative rotation phase between the driving side rotating body and the driven side rotating body,
• the control apparatus comprising:
• a phase controller configured to control the electric motor to reduce, when a target phase is set, a deviation between the target phase and a current first actual phase detected by a phase detection unit that detects the relative rotation phase and to reduce power to be supplied to the electric motor as the deviation decreases;
• and
• a control target setting unit configured to set, instead of the target phase, a first target phase displaced from the target phase to a side of the first actual phase by a set angle in an operation direction in which the deviation is reduced when the target phase is set to a most retarded angle phase or a most advanced angle phase that is an operation limit of the stopper unit,
• wherein the phase controller executes a first phase control that is a phase control of reducing a deviation between the set first target phase and the current first actual phase.