Patent ID: 6928968

Claim:
A variable valve timing controller for an internal combustion engine, said controller comprising: an intake-side variable valve timing device which changes valve timing of an intake valve and is operated by oil pressure; an exhaust-side variable valve timing device which changes valve timing of an exhaust valve and is operated by oil pressure; oil pressure control valves disposed for adjusting oil pressure supplied to each of the variable valve timing devices; an oil pump generating oil pressure commonly used for each of the oil pressure control valves; and mode changing means for changing a control mode of the variable valve timing devices, wherein the mode changing means changes the intake-side variable valve timing device and the exhaust-side variable valve timing device between a base mode and a feedback mode by controlling the oil pressure, the oil pressure control valves control the intake-side and the exhaust-side variable valve timing devices in such a manner that actual valve angles thereof are the base angles in a base mode, the oil pressure control valves control the intake-side and the exhaust-side variable valve timing devices in such a manner that actual valve angles closes to a target valve angle in a feedback mode, and the mode changing means changes the control mode of the intake-side and the exhaust-side variable valve timing devices into the same mode at the same time.