Method of undervoltage protection during engine cranking

Details Method of undervoltage protection during engine cranking Method of undervoltage protection during engine cranking

2007-10-02

2007-10-02

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Electric vehicle

C701S113000, C180S065230

Reexamination Certificate

active

10845999

ABSTRACT:
A method for controlling the cranking of an engine of a vehicle powertrain system having a rechargeable energy storage system that is adapted to provide electric power to an electric machine, wherein the system is adapted to exit from the engine crank state as a function of an output voltage of the energy storage system to the electric machine during the crank state, if the output voltage is less than a crank undervoltage threshold for a predetermined crank time. According to the method, the crank undervoltage threshold is a function of the number of failed start attempts, generally decreasing as a function of the number of failed start attempts. The predetermined crank time is a function of a magnitude of a difference between the output voltage and the crank undervoltage threshold.

REFERENCES:
patent: 6633153 (2003-10-01), Blackburn
patent: 2002/0183918 (2002-12-01), Theisen et al.
patent: WO 03/049965 (2003-06-01), None

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