Patent ID: 8752515
Filing Date: 2014-06-17
Classification: F01L

Abstract:
1. A variable valve timing control apparatus of an internal combustion engine, comprising: a drive rotary member to which a turning force is transmitted from an engine crankshaft; a driven rotary member which is fixed to a camshaft and, to which the turning force is transmitted from the drive rotary member; an electric motor which relatively rotates a motor drive shaft with respect to the drive rotary member by application of power; a speed reduction mechanism which transmits rotation of the motor drive shaft to the driven rotary member with the rotation of the motor drive shaft reduced by relatively rotating the motor drive shaft with respect to the drive rotary member; a housing which is connected integrally with the drive rotary member and houses therein the electric motor; a cover member which is fixed to the engine so as to cover at least a front end part of the housing; a power feed mechanism which feeds the power to the electric motor, the power feed mechanism having: (a) a slip ring disposed at either one of the housing front end and the cover member; and (b) a power-feed brush disposed at the other of the housing front end and the cover member and touching the slip ring; and a ring-shaped member which is fixed to either one side of the cover member and the motor drive shaft and makes sliding contact with the other side of the cover member and the motor drive shaft.