US 11,739,809 B2
Throttle point with a valve body with a changing diameter
Jörg Rösseler, Ruppichteroth (DE); Aleksandar Knezevic, Eitorf (DE); and Steffen Heyn, Niederwerrn (DE)
Assigned to ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed on Jul. 14, 2021, as Appl. No. 17/375,261.
Claims priority of application No. 102020209101.3 (DE), filed on Jul. 21, 2020.
Prior Publication US 2022/0025955 A1, Jan. 27, 2022
Int. Cl. F16F 9/512 (2006.01); F16F 9/19 (2006.01); F16F 9/18 (2006.01); F16F 9/34 (2006.01); F16F 9/348 (2006.01)
CPC F16F 9/512 (2013.01) [F16F 9/182 (2013.01); F16F 9/19 (2013.01); F16F 9/3482 (2013.01)] 17 Claims
OG exemplary drawing
 
1. 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 flow guiding face for flowing damping medium, the throttle point, a throttle cross section of which decreases with an increase flow velocity of the damping medium within the throttle point, the circumferential annular groove forming a pressure chamber which is filled with damping medium, wherein a radially outwardly directed actuating force acts on the valve body, the pressure chamber being a constituent part of a hydraulic system of the damper valve device, wherein the hydraulic system has a connector to at least one working space of the vibration damper, wherein a hydraulic connection of the connector to the pressure chamber is adjustable, and wherein a connecting channel is positioned between two working spaces of the vibration damper, and wherein a bypass channel is connected hydraulically in parallel with the connecting channel, the connecting channel and the bypass channel being connected to the pressure chamber, and wherein an active cross-section of the bypass channel is adjustable.