Zf Friedrichshafen Ag

Jörg Rösseler

Aleksandar Knezevic

Guido Holtmann

Steffen Heyn

Heinz Sydekum

Anton Krawczyk

Achim Eich

Wilhelm-Heinrich Broocks

Volker-Oliver Hupperich

Benjamin Thiessen

Uwe Herrmann

Rudolf Schulte

Jürgen Henrichs

Ingo Gelhausen

Aleksander Knezevic

A damping valve device for a vibration damper is disclosed, the damping valve device comprising a valve body of variable diameter, which is guided by a valve support and, starting from a passage position, adopts a restricting position as a function of a speed of flow of a damping medium within the restriction by a radial closing movement in the direction of a flow guiding surface. The closing movement of the valve body is controlled by at least one damping device.

Restriction for a vibration damper

A damping valve device for a vibration damper having a piston rod includes a first damping valve which, in a first operating range, moves into an operating position allowing throughflow as the flow velocity of a damping medium increases. A second operating range having a progressive damping force characteristic is influenced by a throttle point in conjunction with a valve body. The valve body is configured as a ring element which has a variable diameter and carries out a radial closing movement in the direction of a flow guiding surface at which a defined minimum throughflow cross-section is maintained, a pressure control valve being hydraulically parallel-connected to the throttle point.

Damping valve device having a progressive damping force characteristic curve

A throttle point for a vibration damper, comprising a damper valve carrier with a circumferential annular groove, in which an annular valve body with a variable diameter is arranged. The annular valve body forms, with a guiding face for flowing damping medium, a throttle point, a throttle cross section of which decreases in the case of an increasing flow velocity of the damping medium within the throttle point. The circumferential annular groove forming a pressure chamber which is filled with damping medium. A radially outwardly directed actuating force acts on the valve body, wherein the pressure chamber is a constituent part of a hydraulic system which has a connector to at least one working space of the vibration damper and the hydraulic connection of which to the pressure chamber can be set.

Throttle point with a valve body with a changing diameter

A restriction for a vibration damper, comprising an annular element with variable diameter which is supported by a support and which occupies a restriction position depending on a flow velocity of a damping medium within the restriction proceeding from an open position through a radial closing movement in direction of a flow guiding surface. The annular element has at least two legs supported so as to be movable around a pivot bearing.

A damping valve device having a support with a circumferential groove in which a radially expandable annular element together with a flow surface forms a restriction, which restriction transitions from an open position to a restriction position depending on the flow velocity of a damping medium, and the maximum expansion position of the annular element is determined/limited by a stop. The annular element moves in direction of the open position with a delay when the flow velocity decreases by means of a dead time element.

Damping valve device for a vibration damper

A damping valve includes a damping valve body with an annular groove which has a base and which is limited by an inner valve seat surface and an outer valve seat surface for at least one valve disk. The base of the annular groove has a maximum distance from the valve seat surface along a circumferential area and has a minimum axial distance from the valve seat surface in another circumferential area.

Damping valve for a vibration damper

A damping valve for a vibration damper includes a damping valve body with a through-channel whose outlet opening is at least partially closed by at least one elastically deformable valve disk. A further valve element is associated with the valve disk. This further valve element predetermines a defined lift behavior for the valve disk proceeding from a valve seat surface. The further valve element is formed by an elastic coating of the valve disk that exerts a varying supporting force with respect to the valve disk via the configuration of the top surface of the valve disk.

A damping valve for a vibration damper includes a damping valve body with at least one through-channel, the outlet side of which is at least partially covered by at least one valve disk. The at least one valve disk lifts from a valve seat surface when there is an incident flow via the through-channel, and a supporting disk, as stop, limits the lift movement. An elastomer intermediate layer is arranged between the supporting disk and the valve disk. The elastomer intermediate layer is formed by an elastomer ring which has at least one raised deformation area in direction of the valve disk and/or supporting disk.

A damping valve device for a vibration damper includes a first damping valve that moves into a through-flow operating position in a first operating range with increasing flow velocity of a damping medium. A second operating range with a progressive damping force characteristic is influenced by a throttle point in connection with a valve body that can be transferred into a throttle position. The valve body moves in closing direction with increasing flow velocity of the damping medium and is arranged in series with the damping valve. The valve body is constructed as a ring element with variable diameter that executes a radial closing movement in direction of a flow guide surface in which a defined minimum passage cross section is maintained.

Damping valve device having a progressive damping-force characteristic curve

A damping valve includes a damping valve body having at least one throughflow orifice which is at least partially covered by at least one valve disk by the action of a closing force. At least one spring body exerts an opening force on the valve disk that is less than the closing force. The at least one spring body is constructed as an elastomeric body separately from the control edge.

Damping valve, in particular for a vibration damper

A damping valve () for a vibration damper, includes a damping valve body () with at least one through-channel () whose outlet side is at least partially covered by at least one valve disk (), wherein the at least one valve disk () lifts from a valve seat surface () during impingement via the through-channel (), and a supporting disk (), as stop, limits the lifting movement, wherein the supporting disk () is outfitted in direction of the valve disk () with an elastomeric support () which is formed by a plurality of individual supporting elements ().

A damping valve for a vibration damper includes a damping valve body with separate passage channels. The outlet orifices of the passage channels for a flow direction are connected to one another via a groove, which is covered by at least one valve disk and is bounded radially by at least one annular web on the radially inner side with respect to the center axis (A) of the damping valve and at least one annular web on the radially outer side with respect to the center axis (A) of the damping valve. The radially outer web has at least one first portion in which the support is configured as area support for the valve disk, and the radially outer web has at least one second portion in which the support is configured as line support for the valve disk.

Damping valve having a damping valve body with at least one passage channel between two cover sides. An outlet opening of the passage channel leads into a cover-side annular channel which is limited by an outer annular valve support surface and by an inner annular valve support surface, the at least one annular valve support surface for at least one valve disk has a substantially constant width along the circumference, and the annular channel has a varying width along the circumference, and at least one valve support surface has a varying radius of curvature along the circumference.

A vibration damper includes a cylinder in which a piston fastened to a piston rod executes a translational and a rotational movement relative to the cylinder. The piston is fixed to the piston rod by an axial fastener, and a device for preventing rotation by positive engagement is formed between the piston and the piston rod.

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Ruppichteroth, Germany

Jörg Rösseler