MOTOR VEHICLE SHOCK ABSORBER

摘要

The invention relates to a shock absorber for a wheel suspension of a motor vehicle, comprising a) a damper tube (1) at least partially filled with a damping liquid, b) a piston rod (2) arranged so as to reciprocate in the damper tube (1), c) an element guided in the damper tube (1), which element divides the interior of the damper tube (1) into a piston rod-side working chamber (3) and a working chamber (4) remote from the piston rod, d) a housing (5) connected to the piston rod (2), e) a control valve (6) arranged in the housing (5) and movable back and forth between a closed and an open position. The piston rod-side working chamber (3) and the working chamber (4) remote from the piston rod are hydraulically interconnected via the housing (5) and a first damping valve (7) with soft damping characteristics through which the damping fluid can flow in both flow directions is provided in the housing (5). The first damping valve can be switched by means of the control valve (6) into the flow path of the damping liquid from one working chamber into the other working chamber. The shock absorber further comprises g) a second damping valve (8) having hard damping characteristics through which the damping fluid can flow in both flow directions. The invention addresses the problem of providing a shock absorber for a wheel suspension of a motor vehicle having a damping force that can be switched back and forth between two damping force levels, and which even with small diameters of damper tube generates a sufficiently soft damping characteristic at all piston rod speeds, and in which the damping valve arrangement takes up little overall axial length. To solve that problem, it is proposed that the second damping valve (8) is arranged in the interior of the housing (5), and the housing (5) forms the element by which the interior of the damper tube (1) is divided into a piston rod-side working chamber (3) and a working chamber (4) remote from the piston rod.