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Freight brake control using train net braking ratio

  • US 5,833,325 A
  • Filed: 02/06/1996
  • Issued: 11/10/1998
  • Est. Priority Date: 02/06/1996
  • Status: Expired due to Term
First Claim
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1. Railway freight brake apparatus for operation on-board a rail vehicle in a train, such vehicle having a friction brake actuated by a pneumatic brake cylinder and having a reservoir as a storage source of pressurized fluid, such apparatus comprising:

  • (a) at least one valve to control the pressurization of such brake cylinder from such reservoir;

    (b) means for receiving a brake signal indicative of a desired braking level of such train and for receiving a train net braking ratio;

    (c) a processor for calculating a brake cylinder pressure from said brake signal and said train net braking ratio to produce a net shoe force as if such vehicle had a design net braking ratio generally equal to said train net brake ratio;

    (d) said processor controlling said valve to supply such brake cylinder with pneumatic fluid at said calculated brake cylinder pressure over a portion of a range of braking of such vehicle; and

    (e) wherein said range of braking of such vehicle includes a service application of braking and excludes an emergency brake application as determined from said brake signal.

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