Patent ID: 8047169

Claim:
A variable valve timing apparatus changing opening and closing timing of at least one ( 1100 , 1110 ) of an intake valve ( 1100 ) and an exhaust valve ( 1110 ), comprising: an actuator ( 2060 ) operating with a torque that is larger for a larger command value so as to operate said variable valve timing apparatus; and an operation unit ( 4000 ), said operation unit ( 4000 ) controlling said command value in a first control mode, said operation unit ( 4000 ) controlling said command value in a second control mode in a manner that allows said command value to be larger than said command value controlled in said first control mode, and said operation unit ( 4000 ) selecting said first control mode when said opening and closing timing is in a first region, and selecting said second control mode when said opening and closing timing is in a second region different from said first region.