Vibration damper with speed dependent change of damping force - has two work chambers in piston cylinder connected by openings and additionally using by=pass with valve seat and spring.

摘要

The fluid-filled cylinder has a piston (12) connected to a piston rod (1) and dividing the inner space into two work chambers (9,10) which can be connected together in the piston by openings (7) and damping valves (8). These work chambers can be further connected together by a bypass (6) in the piston rod parallel to the damper valves (8). A valve (2) in the bypass has on each side of a valve body (4) a valve seat interacting with the valve body. The valve body can be held opposite a support face in the bypass by at least one spring (5). The bypass can have a stepped expansion so that a first step acts as a support face for the spring and a further step acts as the valve seat. USE/ADVANTAGE - A high damping force is produced even at low piston speeds.