Valve timing control system for internal combustion engine

• Main Author: IO SHINICHI
• Format: Patent
• Language: English
• Published: 11.12.2001
• Edition: 7
• Subjects: BLASTING; BRAKES; CLUTCHES; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; COUPLINGS FOR TRANSMITTING ROTATION; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

A valve timing control system includes; 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; and a rotational phase controller for variably controlling a rotational phase of the camshaft relative to the rotor. The rotational phase controller is disposed between the rotor and the camshaft. The rotational phase controller includes; 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; and a generator for generating a holding toque 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.