Patent ID: 7140333

Claim:
Apparatus for controlling the operation of a valve of a combustion chamber of an internal combustion engine, comprising: a pivotable rocker arm coupled to said valve, said rocker arm including a first cam follower interacting with a lobe of a rotating cam at a first rotational position of said cam to cause said rocker arm to pivot and thereby open said valve; a second cam follower selectively interacting with said lobe of said rotating cam at a second rotational position of said cam to cause said rocker arm to pivot and thereby open said valve, said second cam follower being adjustably mounted to said rocker arm and movable between two operational positions by selective action of a hydraulic piston, wherein said second cam follower interacts with said lobe at a first operational position thereof with respect to said rocker arm, and has no interaction with said lobe at a second operational position thereof with respect to said rocker arm.