VIBRATION DAMPER HAVING EXTERNAL CONTROL VALVES

The invention relates to a vibration damper (1) comprising a container pipe (2), an inner pipe (3), a piston (4), a piston valve device (5), a base valve device (6), an overflow pipe (11), an electrically activatable first control valve (9) and an electrically activatable second control valve (10). The inner pipe (3) is situated in the container pipe (2). The piston (4) is axially movable in the inner pipe (3) and divides an internal space of the inner pipe (3) into two working chambers (AK1, AK2). The piston valve device (5) is situated on the piston (4) and is designed to allow an overflow of damping medium between the working chambers (AK1, AK2) in a rebound stage and in a compression stage of the vibration damper (1). An equalisation chamber (AGK) is provided between the inner periphery of the container pipe (2) and the outer periphery of the inner pipe (3). The base valve device (6) connects one of the working chambers (AK2) to the equalisation chamber (AGK) in order to allow an overflow of damping medium between said working chamber (AK2) and the equalisation chamber (AGK) in the rebound stage and in the compression stage of the vibration damper (1). The overflow pipe (11) is situated between the inner pipe (3) and the container pipe (2) and provides a first additional flow path (Ü1) from one of the working chambers (AK1) to the equalisation chamber (AGK). (...)