Electropneumatic control valve comprising a guide arrangement for a control piston

US7059688B2 · kind B2 · utility

Assignee

• KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH · DE

Inventors

• Friedbert Roether · Cleebronn, DE
• Joachim Delfs · Hemmingen, DE
• Siegmund Deja · Freiberg, DE
• Eberhard Schaffert · Leonberg, DE
• Günther Strobel · Ditzingen, DE
• Hans Haecker · Leonberg, DE
• Martin Judith · Bietigheim-Bissingen, DE

Key dates

• Filing date: Apr 26, 2002
• Grant date: Jun 13, 2006
• Expiry date: Apr 26, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86919
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Electropneumatic control valve for a pneumatic brake system of a vehicle having a relay valve housing in which an axially adjustable control piston is arranged for actuating a valve seat arrangement which switches the compressed-air flow between at least one exterior brake line connection, a supply pressure connection and a bleeder connection. The control piston is axially guided by means of a coaxial guiding arrangement. The guiding arrangement comprises a separate guiding sleeve which is stationarily fastened to the pilot valve housing and which is provided with an upper guiding section which, for the axial guidance, corresponds with a passage bore in the control piston, and which, in addition, has a lower tube section of a smaller outside diameter adjoining the upper guiding section in order to guide the outgoing air flowing through an integrated axial bleeder duct directly to the bleeder connection.