Electromagnetic actuator with laminated armature for the actuation of the valves of an internal combustion engine

摘要

An electromagnetic actuator (1) in which two electromagnets (6) are provided in order to move, on command, the oscillating arm (5) in order axially to displace the valve (2), the oscillating arm (5) comprising a central plate (8) positioned in the space between the polar heads of the two electromagnets (6), a cylindrical tubular member (9) rigid with a lateral edge of the central plate (8) and a projection (10) extending in a projecting manner from the central plate (8) on the side opposite the cylindrical tubular member (9), the central plate (8) being formed by a pack of sheets (11) of ferromagnetic material stacked on one another and seam welded on the outer lateral surface of the cylindrical tubular member (9) and by a stiffening rib (12) welded to the pack of sheets (11) on the side opposite the cylindrical tubular member (9). <IMAGE>