Patent ID: 6328008
Filing Date: 2001-12-11
Classification: F01L,Y10T

Abstract:
A valve timing control system for an internal combustion engine, comprising:a rotor rotated by a crankshaft of the internal combustion engine;a camshaft rotated according to the rotation of the rotor to open and close an intake valve and an exhaust valve of the internal combustion engine; anda rotational phase controller for variably controlling a rotational phase of the camshaft relative to the rotor, the rotational phase controller being disposed between the rotor and the camshaft, the rotational phase controller comprising:a clutch selectably put in one of a holding state for forbidding a relative rotation between the rotor and the camshaft in at least one of rotational directions and a releasing state for allowing the relative rotation; anda generator for generating a holding torque directing to the rotational direction forbidden by the clutch and applying the holding torque to the clutch when the clutch is put in the holding state.