Abstract: A voltage converter of a high voltage driver generates a high voltage applied to an electrorheological damper. The voltage converter and the electrorheological damper are electrically connected together through a connecting portion. The connecting portion comprises an electrode pin that connects the voltage converter and an electrode cylinder of the electrorheological damper; a ground pin that connects an external cylinder of the electrorheological damper and ground, and a ground detection pin disposed separately from the ground pin and connected to the ground through the external cylinder and the ground pin. When the ground detection pin and the ground are disconnected, the voltage converter discontinues the voltage generation with or without a command (control signal) of a sub-controller.

Abstract: The invention relates to a vibration damper for damping spring retraction and/or spring extension forces on motor vehicles, which includes an inner pressure medium cylinder (1), in which a piston (2) with a piston rod (3) is axially slidably arranged, which divides the inner pressure medium cylinder (1) into a retraction chamber (4) and an extension chamber (5), in which an electrorheological fluid as a pressure medium is contained, wherein the retraction chamber (4) and the extension chamber (5) is connected through at least one throttle gap (6) between the inner cylinder tube (1) and an electrode tube (7) arranged coaxially thereto, and that the electrode tube (7) is surrounded coaxially by a spaced-apart further outer tube (8), which together with the electrode tube (7) forms a gas pressure chamber (9), which is connected through a bottom valve (10) with the retraction chamber (4).