| 摘要 |
<p>Provided is a valve open/close timing controller wherein the pulsating pressure of fluid caused by torque variation of a camshaft is prevented from having an impact on the unlocking fluid channel, and the controller is prevented from entering a locked state unintentionally at the time of driving an internal combustion engine. A valve open/close timing controller is provided with a first fluid passage which supplies/discharges fluid to/from a chamber for advance angle, a second fluid passage which supplies/discharges fluid to/from a chamber for delay angle, a third fluid passage which supplies/discharges fluid to/from a lock mechanism capable of locking relative rotation of an inner rotor and an outer rotor, a first selector valve which controls supply/discharge of fluid to/from the first fluid passage and the second fluid passage, a second selector valve which controls supply/discharge of fluid to/from the third fluid passage, a pump which supplies fluid to the first selector valve and the second selector valve, and a check valve which prohibits circulation of fluid from the first selector valve to the second selector valve and allows circulation of fluid from the second selector valve to the first selector valve.</p> |
