Method and apparatus for starter motor diagnosis and prognosis using parameter estimation algorithm
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United States of America Patent
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-
Jul 31, 2012
Grant Date -
Dec 17, 2009
app pub date -
Apr 29, 2009
filing date -
Jun 16, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system and method for determining the state of health of a starter motor to notify a vehicle driver of a potential starter motor failure before the failure actually occurs. The starter motor includes an armature and motor brushes each providing a resistance, and an armature coil providing an armature inductance. Further, the starter motor has a back EMF because of the starter motor being coupled to a flywheel and the vehicle engine. The system and method monitor the combined resistance of the armature and the motor brushes, the inductance of the armature and a back EMF constant of the motor, and provide a signal indicating a potential starter motor failure if any of these three values significantly deviates from nominal values. In one embodiment, the analysis of the motor resistance, armature inductance and back EMF constant is provided by a regression model to determine estimated motor parameters.
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