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Electropneumatic braking device of a rail vehicle comprising a continuous regulating range

  • US 8,038,226 B2
  • Filed: 05/13/2005
  • Issued: 10/18/2011
  • Est. Priority Date: 05/14/2004
  • Status: Expired due to Fees
First Claim
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1. An electropneumatic brake system of a rail vehicle, containing a direct action electropneumatic braking device and an indirect action compressed-air braking device, and further comprising:

  • a) a pressure regulator which produces a pilot control pressure (Cv direct) of the direct brake as a function of an electric brake pressure request signal of the direct brake,b) a pressure limiting valve which limits the pilot control pressure (Cv direct) of the direct brake to a predefinable, maximum pilot control pressure (Cv direct max) of the direct brake,c) a control valve which generates a pilot control pressure (Cv indirect) of the indirect brake as a function of a main air line pressure (pHL) of the indirect brake, andd) a selection device which transmits, from the maximum pilot control pressure of the direct brake (Cv direct max) and the pilot control pressure (CV indirect) of the indirect brake, a force corresponding to the respective larger pilot control pressure (Cv direct max or Cv indirect) to a transmission, which changes the transmission ratio as a function of the respective load state of the rail vehicle by an actuating device and, which activates a relay valve, which controls a brake pressure (C) in accordance with the activation by the transmission,wherein the selection device is formed by a piston arrangement and/or diaphragm arrangement, having a first active surface which is connected axially fixed to a first piston rod, and a second active surface which transmits force only in one direction to the first piston rod, a first pressure chamber which is subjected to the pilot control pressure (Cv indirect) of the indirect brake being formed between the first active surface and the second active surface, and a second pressure chamber which is subjected to the maximum pilot control pressure Cv direct max) of the direct brake being formed between the second active surface and a wall of a housing.

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