Alfred Teves Gmbh

Itt Corporation

Manfred Rueffer

Lothar Schiel

Wilfried Wagner

Ralf Jakobi

Christoph Jung

Bernd Toepperwien

Peter Boehm

Jurgen Bauer

Harald Luetteke

Hans-Juergen Beilfuss

Michael Vogt

Thomas Schuster

Hubertus Von Gruenberg

Vladimir Dusil

Peter Kraft

Vacuum brake power booster

Automotive vehicle brake unit with anti-locking device

Hydraulic coupling device, as well as brake system with such a coupling

A vacuum brake power booster, in particular for motor vehicles, which includes a poppet valve (12) sealing two valve seats (18, 19) and which is axially deformable within the area of a rolling fold (15) also includes an annular part which is either mounted on the outside of the rolling fold (15) in a form-fit manner or arranged inside the elastic material (24) of the poppet valve (12). This annular part prevents the rolling fold (15) from being blown up outwardly due to the pressure differential prevailing between its two sides so that it will be possible to reduce the return force and thus also the response force.

Vacuum brake power booster, in particular for motor vehicles

A valve arrangement has a housing in which are arranged an electromagnetically actuatable pilot valve controlling a differential pressure and a main valve actuatable by the differential pressure, the closure member of the main valve permitting a connection to be established between an outlet port and, alternatively, a first or a second inlet port. In order to keep the overall length of the valve arrangement as small as possible, the present invention provides a joint axis (29) of the pilot valve (5) and of the electromagnet (6) actuating the pilot valve (5) which is perpendicular to the axis (30) of the main valve (7) in a plane that is radially offset relative to the axis (30). In the inactive position, both compartments (23, 24) are exposed to the higher pneumatic pressure.

Valve arrangement

A metal cup accommodating a reaction disc and the end of a push rod is fixed with respect to a control valve housing of a vacuum brake power booster. The manner of fixation is of simple design, allowing the parts to be manufactured at low cost and offering ease of mounting. According to the invention a metal cup is supported in axial direction at the front side of the control valve housing and is retained by a retaining clip in a positive locking fit with the control valve housing.

Vacuum brake power booster with metal cup supporting reaction disk

In a slip-controlled automotive vehicle brake system, to reduce the number of the valves used, while simplifying the system construction, the wheel brake cylinders are connected to relief chambers (123, 133, 124, 134) of compensating cylinders (120, 130), the connection between the master-brake-cylinder pressure chambers (80, 90) and the relief chambers (123, 124, 133, 134) being closable during slip control.

Automotive vehicle brake system

Growing community of inventors

Sulzbach, Germany

Manfred Rueffer