| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve opening and closing timing control device preventing a locking mechanism from being unlocked by centrifugal force due to an increase of rotation speed of an engine even before a state that sufficient oil pressure is supplied to the valve opening and closing timing control device immediately after starting of the engine. SOLUTION: The valve opening and closing timing control device is provided with a judgment means for judging supply condition of working fluid to a fluid pressure chamber and a control means for performing control of limiting rotation speed of the crank shaft to a predetermined rotation speed or less after starting of the internal combustion engine until the judgment means judges that the fluid pressure chamber has been supplied with the working fluid. COPYRIGHT: (C)2006,JPO&NCIPI
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