Variable valve timing control device
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United States of America Patent
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Oct 22, 2019
Grant Date -
Sep 27, 2018
app pub date -
Mar 9, 2018
filing date -
Mar 23, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A variable valve timing control device includes a valve unit including a spool having a plurality of land portions at an outer circumference of the spool, and being formed with a drain flow path inside the spool. The valve unit allows a second pump port and a lock port to communicate with each other in a case where the spool is set at an unlock position where a lock state of a lock mechanism is released, and the valve unit closes the second pump port with the land portion of the spool and allows the lock port to communicate with the drain flow path in a case where the spool is set at a lock position where the lock mechanism is allowed to be shifted in the lock state.
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