System and method for determining whether a locomotive in a consist is in leading mode or trailing mode
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United States of America Patent
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Sep 17, 2013
Grant Date -
Apr 18, 2013
app pub date -
Dec 4, 2012
filing date -
Mar 16, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
By taking a pressure reading at a particular port on a multiple-unit braking valve, e.g. the MU-2-A valve, and comparing such a reading to a main reservoir pressure, one can identify whether the locomotive in which the valve is situated is in trailing mode or leading mode. In particular, it was found that the pressure on port 63 of the MU-2-A valve is indicative of which mode the locomotive is in since port 63 is exhausted to atmosphere in lead mode whereas it is at or near the pressure in the main reservoir which is readily distinguishable from atmosphere.
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