Variable valve actuating apparatus for internal combustion engine

摘要

A variable valve actuating apparatus includes: a first rotary member which includes a rotor fixed to one of the inner cam shaft and the outer cam shaft, and a receiving chamber formed within the first rotary member, and which is arranged to be rotated in an advance angle direction or in a retard angle direction relative to the drive rotary member by a hydraulic pressure selectively supplied to or drained from the advance angle operation chamber and the retard angle operation chamber; and a second rotary member fixed to the other of the inner cam shaft and the outer cam shaft, rotatably received within the receiving chamber of the first rotary member, and arranged to be rotated relative to the first rotary member and the drive rotary member within a predetermined angle range.

主权项

1. A variable valve actuating apparatus for an internal combustion engine, the variable valve actuating apparatus comprising:
an inner cam shaft including an inner cam formed on an outer circumference thereof; an outer cam shaft which is provided on the outer circumference of the inner cam shaft, which includes an outer cam provided radially outside the outer cam shaft, the outer cam shaft and the inner cam shaft being arranged to be relatively rotated so as to vary a relative rotational phase of the outer cam with respect to the inner cam; a drive rotary member to which a rotational force is transmitted from a crank shaft, and which includes an operation chamber formed within the drive rotary member; a first rotary member which includes a rotor fixed to one of the inner cam shaft and the outer cam shaft, vanes separating the operation chamber into an advance angle operation chamber and a retard angle operation chamber, and a receiving chamber formed within the first rotary member, and which is arranged to be rotated in an advance angle direction or in a retard angle direction relative to the drive rotary member by a hydraulic pressure selectively supplied to or drained from the advance angle operation chamber and the retard angle operation chamber; and a second rotary member fixed to the other of the inner cam shaft and the outer cam shaft, rotatably received within the receiving chamber of the first rotary member, and arranged to be rotated relative to the first rotary member and the drive rotary member within a predetermined angle range.