Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Reexamination Certificate
2005-03-01
2005-03-01
Hoff, Marc S. (Department: 2857)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle diagnosis or maintenance indication
C320S104000
Reexamination Certificate
active
06862504
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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Grolle Kenneth A.
Hamdan Marv M.
Holler Gusztav
Macnamara Joseph M.
Thakkar Kirit A.
Bendix Commercial Vehicle Systems LLC
Calfee Halter & Griswold LLP
Hoff Marc S.
Kim Paul
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