Patent ID: 7201122

Claim:
A device for controlling the kinematics of at least one valve, the device comprising: at least one opening cam and one closing cam, at least one rocker device cooperating with said valve; an elastic member; and an angular offsetting device, wherein: said elastic member constitutes a detent means which acts in the opening direction of the valve upon an assembly comprised of the rocker device and a valve stem; the opening cam and the closing cam each comprise a cam portion for retaining the valve against its seat; said rocker device and said opening cam cooperate to release the valve from its closed position thereby allowing it to be moved to its open position by the elastic member; said rocker device and said closing cam cooperate to generate the return movement of said valve onto its seat for its closure; and said angular offsetting device is arranged to effect a mutual angular offset of the cams in order to obtain a shorter or longer valve opening duration.