Valve timing control apparatus and variable valve actuating apparatus for internal combustion engine

摘要

A valve timing control apparatus for an internal combustion engine includes: a power feeding brush including a tip end portion slidably abutted on the slip ring to feed electric power to the slip ring; and a rotation angle sensing mechanism including; a sensed portion provided to the one end portion of the motor output shaft, and a sensing portion provided to the cover member, and arranged to sense a rotation position of the sensed portion; the cover member including a recessed portion formed in an inner surface of the cover member, and recessed in an axially outward direction relative to the position of the opening end of the brush holding hole; and the sensed portion including a tip end portion inserted and disposed within the recessed portion to confront the sensing portion.

主权项

1. A valve timing control apparatus for an internal combustion engine comprising:
a driving rotation member to which a rotational force is transmitted from a crank shaft; a cam shaft which is arranged to be rotated relative to the driving rotation member, and to open and close an engine valve; an electric motor which is provided to the driving rotation member, and which is arranged to rotate the cam shaft relative to the driving rotation member by a motor output shaft; a speed reducer which is arranged to reduce a rotation speed of the motor output shaft of the electric motor, and to transmit the speed-reduced rotation to the cam shaft; a slip ring which is provided to the electric motor; a cover member which is disposed on an outer end surface of the electric motor on a side of the slip ring, and which confronts the outer end surface of the electric motor on the side of the slip ring in an axial direction; a power feeding brush which is held in a brush holding hole formed in the cover member, and which includes a tip end portion that protrudes from an opening end of the brush holding hole, and that is slidably abutted on the slip ring to feed electric power to the slip ring; a rotation angle sensor which is disposed between one end portion of the motor output shaft and the cover member confronting the one end portion of the motor output shaft, and which is arranged to sense a rotation angle of the motor output shaft, the rotation angle sensor including
a sensed portion provided to the one end portion of the motor output shaft, anda sensing portion which is provided to the cover member, and which is arranged to sense a rotation position of the sensed portion, the cover member including a recessed portion which is formed in an inner surface of the cover member, and which is recessed in an axially outward direction of the cover member relative to the position of the opening end of the brush holding hole; and the sensed portion including a tip end portion inserted and disposed within the recessed portion to confront the sensing portion.