Method and system for identifying performance degradation of a cooling subsystem in a locomotive
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United States of America Patent
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Sep 3, 2002
Grant Date -
N/A
app pub date -
Oct 28, 1999
filing date -
Oct 28, 1999
priority date (Note) -
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Abstract
A method and system for identifying or determining degradation in performance of an engine cooling subsystem having an electric motor for powering a fan in a locomotive is provided. The method allows for monitoring a signal indicative of an electrical imbalance in one or more phases in the fan motor of the cooling subsystem, and for adjusting the value of the monitored signal for deviations from an estimated nominal phase signal value due to predetermined external variables so as to generate an adjusted phase signal value. The method further allows for comparing the value of the adjusted phase signal value against the nominal phase signal value to determine the performance of the cooling subsystem.
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