System and method for detecting alternator condition
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United States of America Patent
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Mar 1, 2005
Grant Date -
Mar 11, 2004
app pub date -
Sep 10, 2002
filing date -
Sep 10, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method for detecting alternator condition is provided. Information is taken from the vehicle powerline and the communication links, and processed by the vehicle ECU, such as the vehicle antilocking brake system ECU, to obtain data. The battery voltage ripple amplitude is then calculated and compared at different engine speeds. If the difference in the ripple amplitude at the different engine speeds is greater than a predetermined threshold value, a signal is sent indicating that the alternator has failed.
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