AUTOMATIC TRACTION RELAY VALVE DIAGNOSTIC USING PRESSURE TRANSDUCER FEEDBACK
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United States of America Patent
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Issued Date -
Mar 26, 2015
app pub date -
Sep 26, 2013
filing date -
Sep 26, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system and method of diagnosing and/or mitigating the effects of a malfunctioning brake valve configured to supply pressurized fluid to a brake unit via a pressure delivery line during automated braking operations including detecting a period of no braking activity, venting the pressure delivery line to atmosphere during the period of no braking activity, monitoring pressure in the pressure delivery line to detect a pressure change resulting from the venting, and generating an error signal if a detected pressure change exceeds a threshold value. The pressure modulating valve can be periodically cycled once a fault is detected to reduce the effects thereof.
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