Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – In vehicle wiring
Reexamination Certificate
2009-02-25
2011-11-08
Koval, Melissa (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
In vehicle wiring
Reexamination Certificate
active
08054083
ABSTRACT:
A hybrid electric vehicle (HEV) has an algorithm for executing a method for diagnosing a high-voltage (HV) fault condition aboard the HEV. The HEV includes a high-voltage (HV) battery, an auxiliary power module (APM), a power inverter module (PIM), and a three-phase motor/generator unit (MGU). A controller executes the method to thereby measure a DC output current from the HV battery, a DC inlet current into the APM, and a pair of AC phase currents in the MGU. The method further includes calculating a DC inlet current into the PIM using the AC phase currents, diagnosing the HV fault condition using the DC output currents and the DC inlet currents, and executing a control action in response to the diagnosed condition. The method can include shutting off the APM to determine whether the APM is the root cause of the HV fault condition.
REFERENCES:
patent: 2005/0254273 (2005-11-01), Soudier et al.
patent: 2007/0013333 (2007-01-01), Ajima et al.
patent: 2007/0219749 (2007-09-01), Jayabalan et al.
patent: 2008/0150573 (2008-06-01), Fu et al.
Bae Bon Ho
Bauer Harry J.
Cawthorne William R.
Wang Wei D.
GM Global Technology Operations LLC
Grant Robert
Koval Melissa
Quinn Law Group PLLC
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