Variable valve timing control apparatus
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United States of America Patent
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Aug 23, 2016
Grant Date -
Feb 5, 2015
app pub date -
Jul 16, 2014
filing date -
Jul 31, 2013
priority date (Note) -
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Abstract
A variable valve timing control apparatus includes a driving-side rotation member rotating in synchronization with a crankshaft of an internal combustion engine, a driven-side rotation member integrally rotating with a camshaft of the internal combustion engine, an intermediate lock mechanism being selectively switchable between a locked state and an unlocked state, a plurality of hydraulic chambers, at least one of the plurality of hydraulic chambers being positioned at a lower side than an axis of the camshaft, a plurality of partition portions, each of the plurality of partition portions dividing each of the hydraulic chambers into an advanced angle chamber and a retarded angle chamber, an electromagnetic valve including a supply and discharge port that is positioned at an upper side than the axis of the camshaft and switching supply and discharge of fluid relative to the hydraulic chambers, and a pump supplying fluid to the electromagnetic valve.
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