Patent ID: 7921820
Filing Date: 2011-04-12
Classification: F01L

Abstract:
1. A valve timing control apparatus comprising: a driving rotation member rotating around an axis of a camshaft opening or closing a valve of an internal combustion engine in synchronization with a crankshaft of the internal combustion engine; a driven rotation member relatively rotating with the driving rotation member inside the driving rotation member, the driven rotation member integrally rotating with the camshaft; an advance angle chamber provided between the driving rotation member and the driven rotation member and displacing a rotation phase of the driven rotation member relative to the driving rotation member in an advance angle direction when a hydraulic fluid is supplied thereto; a retard angle chamber provided between the driving rotation member and the driven rotation member and displacing the rotation phase of the driven rotation member relative to the driving rotation member in a retard angle direction when the hydraulic fluid is supplied thereto; a groove provided on at least one of an inner surface of the driving rotation member and an outer surface of the driven rotation member for supplying the hydraulic fluid to a sliding contact portion formed by the inner surface of the driving rotation member and the outer surface of the driven rotation member; an advance angle oil passage for supplying the hydraulic fluid to the advance angle chamber; a retard angle oil passage for supplying the hydraulic fluid to the retard angle chamber; and a groove oil passage for supplying the hydraulic fluid to the groove.