Driver brake valve

US4869557A · kind A · utility

Assignee

• Knorr-Bremse AG · DE

Inventors

• Eduard Gerum · Rosenheim, DE
• Erik Hefter · Eichenau, DE
• Gerd Kessel · Olching, DE
• Manfred Weissflog · Munich, DE

Key dates

• Filing date: Jan 14, 1988
• Grant date: Sep 26, 1989
• Expiry date: Jan 14, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S303/03
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Driver brake valve for operating compressed air brakes of rail vehicles. An electropneumatic converter is used to generate a servopressure. The servopressure actuates a relay valve for pressurizing a main air line. An electronic regulation circuit receives a plurality of electrical control signals, including a signal proportional to the pneumatic servo-pressure. The regulation circuit generates an ideal value signal for controlling the electro-pneumatic converter and controls the starting behavior of the brake system. Brake demands which exceed a threshold value are applied to the electronic circuit which generates the ideal value signal. Pressure sensors connected to the main air line and a flow sensor connected to a main container line are used to derive the ideal values for controlling the pneumatic servopressure and the operation of the relay valve.