ELECTROMAGNETIC ACTUATING DEVICE PARTICULARLY FOR OPENING AND CLOSING A VALVE DEVICE, VALVE DEVICE HAVING AN ACTUATING DEVICE OF THIS KIND, CONTROLLABLE VIBRATION DAMPER COMPRISING AN ACTUATING DEVICE OF THIS KIND AND MOTOR VEHICLE HAVING A VIBRATION DAMPER OF THIS KIND

摘要

The present invention relates to an electromagnetic actuating device, particularly for opening and closing a valve device (560), comprising a coil unit (562) which can be supplied with current and by means of which, when current is supplied thereto, an armature (564) mounted to be movable along a longitudinal axis (L) of the actuating device (12) can be moved between a retracted position and an extended position, a ram (566) which interacts with the armature (564) and is mounted to be movable along the longitudinal axis (L). Said ram has a first end (598), with which the ram (566) interacts with a closure element (574) for opening and closing the valve device (560), and a second end (600), wherein the ram (566) is arranged such that same projects with the first end (598) thereof into a first chamber (586), in which a pressure medium is held under a first pressure (p1), and said ram projects with the second end (600) thereof into a second chamber (588), in which the pressure medium is held under a second pressure (p2). The invention further relates to a valve device (560) having an actuating device (12) of this kind. The invention further relates to a controllable vibration damper (10) which comprises an actuating device (12) of this kind, and to a motor vehicle (610) having a controllable vibration damper (10) of this kind.