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Electronic stroke sensor for air disc brake

  • US 9,855,940 B2
  • Filed: 05/28/2014
  • Issued: 01/02/2018
  • Est. Priority Date: 06/18/2010
  • Status: Active Grant
First Claim
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1. A method of detecting a fault condition of an air disc brake, comprising the steps of:

  • providing a brake actuator having a pushrod being extensible from said brake actuator for actuating a lever arm of an air disc brake;

    monitoring, with a pushrod sensor, a changing length of extension of said pushrod from said brake actuator;

    monitoring, with a pressure sensor, an air pressure of said brake actuator;

    counting, with a dithering counter, a number of dithers of said pushrod between two positions while monitoring said length of extension of said pushrod from said brake actuator;

    determining, with a processor, a low lining brake clearance condition of said air disc brake based on a combination of said counting said number of dithers of said pushrod between two positions while monitoring said changing length of extension of said pushrod and said air pressure of said brake actuator.

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