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Railway car braking system including piezoelectric pilot valve and associated methods

  • US 6,302,495 B1
  • Filed: 06/04/1999
  • Issued: 10/16/2001
  • Est. Priority Date: 06/04/1999
  • Status: Expired due to Fees
First Claim
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1. A railway car brake system comprising:

  • at least one pneumatic brake cylinder;

    a relay valve for controlling pressure in the at least one brake cylinder responsive to a pilot pressure;

    at least one pilot valve connected to said relay valve for controlling the pilot pressure, said at least one pilot valve comprising at least one piezoelectric element; and

    a controller connected to said at least one piezoelectric element for controlling the pilot pressure to thereby control braking.

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