VALVE OPENING/CLOSING TIMING CONTROL DEVICE
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United States of America Patent
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Issued Date -
May 23, 2019
app pub date -
Jun 13, 2016
filing date -
Jun 13, 2016
priority date (Note) -
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Abstract
A valve opening/closing timing control device is configured to implement controlling of a relative rotation phase and controlling of a lock mechanism by means of a small control valve. The valve opening/closing timing control device includes a first valve whose position is switched electromagnetically and a second valve whose position is switched by a fluid pressure controlled by the first valve. The second valve is constituted of at least one of a phase control valve that controls the relative rotation phase by providing an advance chamber or a retard chamber with an operating fluid from a fluid pressure pump and a lock control valve that controls a lock state of the lock mechanism by controlling the operating fluid from the fluid pressure pump.
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