Planetary gear transmission systems or components – With lubricaton
Reexamination Certificate
2011-07-26
2011-07-26
Wright, Dirk (Department: 3655)
Planetary gear transmission systems or components
With lubricaton
C184S006400
Reexamination Certificate
active
07985154
ABSTRACT:
A method for controlling hydraulic line pressure for component lubrication in a transmission includes monitoring a speed of an engine and an electric machine, determining a minimum line pressure required to lubricate the engine based upon the speed of the engine, determining a minimum line pressure required to lubricate the electric machine based upon the speed of the electric machine, controlling a minimum line pressure of a hydraulic control system to at least satisfy a larger value of the minimum line pressures.
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patent:
Day Kristin L
Sah Jy-Jen F.
GM Global Technology Operations LLC
Wright Dirk
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