Valve timing control apparatus
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Aug 25, 2015
filing date -
Aug 29, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A valve timing control apparatus includes: a drive-side rotational member synchronously rotating with a drive shaft of an internal combustion engine; a driven-side rotational member disposed inside the drive-side rotational member and integrally rotating with a valve opening/closing camshaft; a hydrostatic pressure chamber formed by partitioning a space between the drive-side rotational and driven-side rotational members; an advance angle chamber and a retardation angle chamber formed by dividing the hydrostatic pressure chamber; an intermediate lock mechanism able to selectively switch between locked and unlocked states; an advance angle flow path allowing the hydraulic fluid to be circulated; a retardation angle flow path allowing the hydraulic fluid to be circulated; a control valve having a spool; and a phase control unit controlling the control valve.
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