Holding a hybrid electric vehicle on an inclined surface

Details Holding a hybrid electric vehicle on an inclined surface Holding a hybrid electric vehicle on an inclined surface

2007-10-09

2010-06-29

Dickson, Paul N (Department: 3618)

Motor vehicles

Power

Electric

C903S930000, C477S005000

Reexamination Certificate

active

07743860

ABSTRACT:
In a powertrain that includes wheels supporting a vehicle, an engine, a first machine able to operate alternately as an electric motor and electric generator, a second machine electric able to operate as an electric motor, and an electric storage battery having a variable state of charge, a method for holding the vehicle stationary on an incline including determining a magnitude of torque at the wheels required to hold the vehicle on the incline, determining whether the state of charge is low or high relative to a reference state of charge, determining whether a temperature of the first machine is low or high relative to a first reference temperature, and whether a temperature of the second machine is low or high relative to a second reference temperature, using the engine and the machines in various combinations to produce the required torque at the wheels.

REFERENCES:
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patent: 6540035 (2003-04-01), Nagano et al.
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patent: 7395837 (2008-07-01), Foster et al.
patent: 7509202 (2009-03-01), Scelers
patent: 7516007 (2009-04-01), Tamai et al.

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