Patent ID: 9004030
Filing Date: 2015-04-14
Classification: F02D,Y02T

Abstract:
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; a first lock recessed portion formed on a sliding surface of the drive rotary member on which an axial end surface of the second rotary member is slid; a first lock member which is arranged to be moved in a direction of a rotation axis of the second rotary member, and which is arranged to be moved into and engaged with the first lock recessed portion, and thereby to lock the relative rotation between the drive rotary member and the second rotary member, and which is arranged to be moved out of the first lock recessed portion, and thereby to release the lock between the drive rotary member and the second rotary member; a second lock recessed portion formed in a side of the second rotary member; a second lock member provided to the first rotary member to be moved in an axial direction, and arranged to be moved into and engaged with the second lock recessed portion to lock the relative rotation between the first rotary member and the second rotary member, and to be moved out of the second recessed portion to release the lock between the first rotary member and the second rotary member; a first lock passage arranged to supply the hydraulic fluid, and thereby to move the first lock member out of the first lock recessed portion; and a second lock passage arranged to supply the hydraulic fluid, and thereby to move the second lock member out of the second lock recessed portion, wherein at least a part of the first lock recessed portion and at least a part of the second lock recessed portion are disposed at a position to be projected in an axial direction when the first lock member and the second lock member are in the lock state.