Patent ID: 6085704
Filing Date: 2000-07-11
Classification: F01L

Abstract:
An electromagnetically operating actuator including an armature having a tappet associated with intake and/or exhaust valves of an engine, valve-opening and valve-closing electromagnets attracting the armature to open and close the intake and/or exhaust valves, and valve-opening and valve-closing spring members biasing the intake and/or exhaust valves in the opening direction and the closing direction to retain the intake and/or exhaust valves in neutral positions, comprising:a transmission mechanism for transmitting force from the tappet to the intake and/or exhaust valves to open and close the intake and/or exhaust valves, said transmission mechanism including a pivotally movable transmission cam interposed between a valve stem of each of the intake and/or exhaust valves, and the tappet, which is associated with the armature and in opposed relation to the valve stem substantially along a direction of movement of the valve stem, the transmission cam having a second cam surface that receives the force from the tappet and a first cam surface that transmits the force to the valve stem.