CAMSHAFT ASSEMBLY

摘要

A camshaft assembly includes a base shaft extending along a longitudinal axis. The base shaft is configured to rotate about the longitudinal axis. The camshaft assembly further includes a series of lobe packs mounted on the base shaft. The lobe pack includes a first cam lobe, a second cam lobe, and a third cam lobe. The lobe pack further includes a barrel cam defining a control groove. The camshaft assembly further includes an actuator including an actuator body and at least one pin movably coupled to the actuator body. The lobe pack is configured to move axially relative to the base shaft between a first position, a second position, and a third position. These three lobe pack positions are used to define three discrete valve lift profiles for the intake or exhaust valves in the cylinder. The lift profiles can be different for each engine valve.

主权项

1. A camshaft assembly, comprising:
a base shaft extending along a longitudinal axis, the base shaft being configured to rotate about the longitudinal axis; a lobe pack mounted on the base shaft, wherein the lobe pack defines a control groove and includes a plurality of cam lobes axially spaced from one another; an actuator including an actuator body and at least one pin movably coupled to the actuator body between a retracted position and an extended position; wherein the lobe pack is configured to move axially relative to the base shaft between a first position and a second position when the base shaft rotates about the longitudinal axis and the at least one pin is in the extended position and at least partially disposed in the control groove; and wherein the lobe pack is configured to move axially between the second position and a third position when the base shaft rotates about the longitudinal axis and the at least one pin is in the extended position and at least partially disposed in the control groove.