Patent ID: 7418936

Claim:
An internal combustion engine having a plurality of intake and/or exhaust valves associated with each cylinder, the engine including a valvetrain comprising: a plurality of independently pivotable rocker arms each associated with one of the plurality of valves, each rocker arm including an aperture defined by a bottom wall having a pivot ball cup and inboard and outboard side walls extending from the bottom wall to a top wall; a single fulcrum associated with each cylinder and having a plurality of pivot ball cups each associated with one of the rocker arms for accommodating a pivot ball disposed between the fulcrum and an associated rocker arm pivot ball cup, the fulcrum extending through the apertures of the rocker arms and having at least four guide slots for receiving corresponding rocker arms for actuating at least two intake valves and at least two exhaust valves with each slot having generally parallel opposing lateral surfaces for receiving and guiding both sides of an associated rocker arm so the rocker arm pivots about the pivot ball in a plane of the rocker arm.