| 摘要 |
PROBLEM TO BE SOLVED: To rotate a rotor member for a short time relative to a housing member to a region where a lock mechanism functions at a start of an internal combustion engine, in a valve opening/closing timing control device for controlling the opening/closing timing of an exhaust valve or an intake valve in the internal combustion engine. SOLUTION: The valve opening/closing timing control device is provided with a hydraulic circuit for controlling supply/drainage of operating fluid to/from an advance angle oil chamber and a retard angle oil chamber and controlling locking/unlocking of the lock mechanism. As the hydraulic circuit, a hydraulic circuit C is employed which has an oil pump 110 driven by the internal combustion engine, a control valve 100 for controlling operating fluid supplied from the oil pump 110 to control supply/drainage of operating fluid to/from the advance angle oil chamber and the retard angle oil chamber and for controlling locking/unlocking of the lock mechanism, and a check valve 130 disposed between the control valve 100 and the oil pump 110 so as to be close to the control valve 100 and preventing a flow to the oil pump 110 side. COPYRIGHT: (C)2010,JPO&INPIT |
