Wabco Gmbh

Wabco Europe Bvba

Lars Didwiszus

Hartmut Schappler

Bernd-Joachim Kiel

Andreas Teichmann

Thomas Müller

Ingo Torhoff

Karsten Runge

Dieter Steinfeld

Manuel Nave

An electropneumatic pilot unit for controlling a pneumatic consumer is provided herein. The pilot unit comprises at least two electromagnetic pilot valves. Each of the electromagnetic pilot valves comprises a coil for producing a magnetic flux along a valve axis, an armature which can be moved in the axial direction of the valve axis, a valve seat which can be closed and opened by the armature, and a pneumatic inlet port and a pneumatic outlet port. At least two of the pilot valves lie next to each other with parallel valve axes. Each pilot valve has a port which protrudes towards a common underside for connection to a pilot chamber of the consumer controlled by the pilot valves.

Pilot unit, actuator system and method for producing said system

A valve arrangement for brake control of a vehicle braking system which is operated using pressure medium includes a relay valve arranged in a housing, and a solenoid valve configured for controlling the relay valve. The relay valve has an axially displaceable relay valve piston with a first annular sealing seat configured to be acted on with a control pressure which is directed into a control pressure chamber and which can be adjusted by the solenoid valve, having an axially displaceable plate valve having a radial sealing face, and having an insert secured to the housing which separates an operating chamber from a pressure chamber and which has a second annular sealing seat which is arranged coaxially relative to the first annular sealing seat of the relay valve piston. The first and second annular sealing seats cooperate simultaneously or alternately with the radial sealing face of the plate valve.

Valve arrangement

A piston, e.g., for a control valve in a vehicle compressed air system, is housed in a cylinder in an axially displaceable manner along a longitudinal center axis separating a first cylinder chamber and a second cylinder chamber. The piston has a peripheral annular groove of approximately rectangular cross-sectional in which a sealing ring is inserted, the free end of which is disposed on the inner cover surface of the cylinder. The sealing ring defines, together with at least one groove wall, at least one pressure support chamber. The piston also comprises, in the region of the annular groove, at least one axial opening, which joins the at least one pressure support chamber to the associated first or second cylinder chamber. A pneumatic or hydraulic connection independent of any geometric deformations of the sealing ring is enabled between at least one cylinder chamber and the associated pressure support chamber.

Piston for a compressed air control valve

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Hannover, Germany

Lars Didwiszus