Patent ID: 8316807

Claim:
An engine valve system comprising: a first cam; a second cam mounted coaxially with the first cam; a summation rocker adjacent to the first cam and the second cam; a first cam follower coupled to the summation rocker and in mechanical communication with the first cam; a second cam follower coupled to the summation rocker and in mechanical communication with the second cam; a valve-actuating rocker pivotably coupled to the summation rocker and operable to open an engine valve in dependence upon a movement of the summation rocker; and an eccentric coupling the summation rocker to at least one of the first cam follower, the second cam follower, and the valve-actuating rocker, wherein the summation rocker moves in proportion to an instantaneous sum of a lift of the first cam and the second cam and the eccentric is adjustably rotatably operable to adjust a clearance between at least two components within the engine valve system.