Hitachi Automotive Systems Europe Gmbh

Other

Bayer Aktiengesellschaft

Carl Schenck Ag

Dorothea Adams

Horst Rosenfeldt

Horst Scherk

Eckhardt Wendt

Joachim Funke

Hans-Joachim Faulstroh

Frank Schroeter

Eckhard Wendt

Matthias Bruns

Heinz Ulrich Hensgen

Nils Herrmann

Lucien Johnston

Gerald Fees

Daniel Kieser

Klaus Busing

Joachim Dr-Ing Funke

An electrorheological composition has corrosion-inhibiting properties and contains at least one organic ionic compound as an electrolyte. Also disclosed are methods for the production thereof and the use thereof.

Electrorheological compositions

A vibration damper for damping spring retraction and extension forces on vehicles includes an inner pressure medium cylinder, in which a piston with a piston rod is axially slidably arranged to divide the inner cylinder into a retraction chamber and an extension chamber in which an electrorheological fluid is contained as a pressure medium. The two chambers are connected through at least one throttle gap between the inner cylinder and an electrode tube arranged coaxially thereto. The electrode tube is surrounded coaxially by an outer tube which forms a gas pressure chamber connected with the retraction chamber through a bottom valve. Axially linear or helical seals are arranged between the inner cylinder and the electrode tube, and divide the throttle gap into at least two valve partial gaps. A throttled non-return valve opens toward the gas pressure chamber between the extension chamber and the gas pressure chamber.

Vibration damper

A passive force element on the basis of electrorheological liquids includes a piston with a piston rod guided in a cylindrical housing, and a force introduction element connected with the piston rod. The piston forms, in the cylindrical housing, two variable-volume working chambers, which are filled with electrorheological liquids, and which are connected by a fluid connection including a valve arrangement with an electrorheological liquid valve for controlling the throughflow characteristic. A regulated damping characteristic can be adjustedly set and force peaks are avoided, because the force introduction is achieved via the force introduction element, and the piston is coupled onto the force introduction element via an elastic element.

Passive force element on the basis of electrorheologic liquids

In a pressure motor for electro-rheological fluids comprising a housing (1) surrounding two operating chambers (A, B), a piston (3) moveable in the housing (1), an inlet channel (22) for supplying, and an outlet channel (23) for discharging an electro-rheological fluid, and electro-rheological valves (1a, 1b, 2a, 2b) comprising an annular gap (8) which in each case connects an operating chamber (A and B) to the inlet channel (22) or the outlet channel (23) and whose boundary surfaces form electrodes for the generation of an electric field, the electro-rheological valves (1a, 1b, 2a, 2b) are formed by bores (6) which penetrate through the housing wall in the longitudinal direction and by mandrels (7) which are arranged in the bores (6) and are insulated from the housing (1), where the bores (6) and the mandrels (7) co-define annular gaps (8) of a constant gap width and the mandrels (7) can be connected to a high voltage and the housing (1) can be connected to earth potential.

Pressure motor for electro-rheological fluids

Growing community of inventors

Buettelborn, Germany

Dorothea Adams