Frequency-dependent damping valve arrangement
AssigneeZF Friedrichshafen AG
InventorAndreas Förster
Life of this patent
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Abstract
A damping valve arrangement (1) for a vibration damper includes a damping piston (2) with a check valve, which damping piston (2) divides a cylinder (31) of the vibration damper into a first working chamber (32) and a second working chamber (33), and a control arrangement (3) with a control pot (8) and a control piston (9) which is axially movable therein. A connection channel (41) connects the first working chamber (32) to the second working chamber (33). The connection channel (41) is arranged such that it is at least partially closed by the control piston (9) during an axial displacement of the control piston (9) in direction of the damping piston (2) and opened again during an axial displacement of the control piston (9) in direction of the pot base (30).
Claims12
A damping valve arrangement for a vibration damper, comprising:
- a piston rod;
- a cylinder at least partially filled with damping fluid;
- an axially displaceable damping piston arranged inside said cylinder and axially fixed to said piston rod, said damping piston comprising at least one flow channel formed in the damping piston and covered by at least one valve disk, said damping piston dividing said cylinder into a first working chamber on the piston rod side and a second working chamber remote of the piston rod;
- a control arrangement arranged at said piston rod coaxial to said damping piston and comprising a control pot having a cylindrical pot wall and a disk-shaped pot base arranged at an end of said control pot remote of said damping piston and devoid of any flow passage for the damping medium, said control arrangement further comprising an axially displaceable control piston arranged in said control pot and constructed to axially limit a control space enclosed in said control pot;
- said damping valve arrangement further comprising an inlet connection connecting said first working chamber to said control space, and wherein at least one spring arrangement is arranged between said control piston and said damping piston;
- said spring arrangement configured to load said valve disk axially in the direction of said flow channel and said control piston in the direction of said pot base with a defined spring force;
- and
- said damping valve arrangement further comprising a connection channel connecting said first working chamber to said second working chamber, said connection channel arranged so that the connection channel is at least partially closed by said control piston during an axial displacement of said control piston in the direction of said damping piston and opened during an axial displacement of said control piston in the direction of said pot base.
Dependencies are inferred from the claim text.