| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve open/close timing control device capable of securing engagement of a lock pin even when pressure fluctuation of operating oil in an oil chamber occurs due to fluctuating torque applied by a camshaft. Ž<P>SOLUTION: Passages (18a, 18b, 19, 21d, 21e, 21h, 21j, 43) for supplying/discharging fluid to/from relative rotational control mechanisms B1, B2 of a hydraulic circuit C are formed independently from a passage for supplying/discharging fluid to/from an advance angle oil chamber R1 and/or a retard angle oil chamber R2. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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