Patent ID: 8225764

Claim:
A cam carrier assembly comprising: at least a cam carrier mounted on a cylinder head and including a support; an actuator shaft, a portion of which is mounted in the support and rotatable to control a valve life; and a cap mounted on the cylinder head and coupled to the at least a cam carrier to rotatably support the portion of the actuator shaft and surrounding and rotatably supporting the other portion of the actuator shaft, which is not surrounded by the support; wherein the at least a cam carrier further includes a seating portion and a seating surface, the seating portion and the seating surface extending from the support along a longitudinal direction of the actuator shaft to an adjacent cam carrier, and wherein the seating surface is formed on one side of the seating portion and has an arc-shaped cross section to receive the other portion of the actuator shaft therein; wherein the cap includes a fixing portion fixedly contacting the support of the at least a cam carrier to rotatably support the portion of the actuator shaft and an extension fixedly contacting the seating portion to rotatably support the other portion of the actuator shaft; wherein the extension includes a seating surface having a substantially arc-shaped cross section such that the seating surface of the seating portion and the seating surface of the extension form a substantially semi-circular cross-section, while the at least a cam carrier and the cap are assembled, to rotatably support the other portion of the actuator shaft; wherein the fixing portion of the cap includes a second recess having a substantially semicircular cross section to rotatably receive the portion of the actuator shaft therein; and wherein the first and second recesses define a mounting hole into which the portion of the actuator shaft is rotatably fitted, and wherein the mounting hole communicates with a lubrication passage that allows lubricating oil to pass through.