Zf Friedrichshafen Ag

Audi Ag

Burkhard Meyer

Hubert Siemer

Stefan Loheide

Josef Burwinkel

A controllable hydraulic bearing for damping vibrations in a defined frequency band is proposed, which includes an elastomeric body (), two chambers which are filled with a magneto-rheological fluid and connected with one another by at least one channel (), with the chambers having at least partially flexible chamber walls, wherein the buckling spring rate of the chamber walls represents a measure for a pressure change due to the volume displacement between the chambers, and at least one electromagnet which generates a magnetic field in the region of the channel (). According to the invention, the magnetic field in the region of the channel () is an inhomogeneous magnetic field.

Controllable hydraulic bearing

A limit stop with an elastomer resilient element, which is to be secured on a door or lid and/or on an opposing stationary vehicle section for damping forces generated when the door or lid strikes stationary chassis parts of a motor vehicle. The limit stop includes an additional damping section disposed adjacent to and cooperating with the elastic resilient element in a spring deflection direction of the resilient element. The damping section comprises at least two chambers filled with a fluid and a nozzle plate arranged between the chambers with at least one channel extending through the nozzle plate and connecting the chambers. The fluid is displaced from one of the chambers into the other chamber during a spring deflection of the elastomer resilient element, thereby producing a pressure force which is caused by the buildup in pressure when the volume of one of the chambers decreases and augments the return force of the resilient element.

Limit stop for a door or lid of a motor vehicle

A hydraulically damping elastomer bearing has at least one housing (), a connection element (), an elastomer body (), which couples the housing () and the connection element () with one another in a vibration-damping manner. Two chambers () filled with a fluid are provided as well as at least one flow channel (), which connects the chambers () to one another. A recess () in the housing () is associated with the flow channel (). A valve () is present in the recess () for opening and closing the flow channel (). An actuator () is provided for actuating the valve () on the outside of the housing (). The valve () includes an elastic diaphragm (), in which an insert () is embedded.

Hydraulically damping elastomer bearing

An elastomer bearing with hydraulic damping is disclosed which includes a housing (), a connecting element (), an elastomer body () which couples the housing () and the connecting element () with one another for damping oscillations, two chambers () filled with a magneto-rheological fluid, at least one flow channel () connecting the chambers () with one another for fluid conduction, as well as an actuator () associated with the flow channel and attached on the outside of the housing () for generating a magnetic field. According to the invention, a field return element () with interacts with the actuator is arranged on or in the flow channel ().

Elastomer bearing with hydraulic damping

A hydraulically damping bush bearing () has an inner part () with a hole () extending along a longitudinal axis (); an outer sleeve () surrounding the inner part (); an elastomeric damping member () arranged between the inner part () and the outer sleeve (); and at least two chamber pairs () with at least two separate chambers () each, which are filled with a hydraulic fluid. The two chambers () of a first chamber pair () are arranged axially along the longitudinal axis () and the two chambers () of a second chamber pair () are arranged radially in relation to the longitudinal axis () and are arranged in the axial direction of the longitudinal axis () between the two chambers () of the first chamber pair (); a channel carrier (), which connects to one another the two chambers () each of one of the chamber pairs () via at least one damping channel () each arranged in or at the channel carrier (); and an outer bush (), which surrounds the elastomeric damping member (), the outer sleeve (), the channel carrier () as well as the at least two chamber pairs (). The chambers () of the first chamber pair () and the chambers () of the second chamber pair () overlap in some areas at least an axial partial section (A, B) in relation to the longitudinal axis ().

Hydraulically damping bush bearing

A hydraulically damping bush bearing is provided with hydraulic area formed from at least two chamber pairs, wherein each chamber pair is formed from at least two separate chambers, which are connected to one another via at least one damping channel. The hydraulically damping bearing with damping in both the axial direction and the radial direction is further improved to the effect that damping or stiffness that can be switched off or on depending on the operating state is also made possible. The hydraulically damping bush bearing () chambers () of the chamber pairs () can be connected via a closable chamber wall opening ().

Growing community of inventors

Dinklage, Germany

Burkhard Meyer