Interrelated power delivery controls – including engine control – Plural engines – Electric engine
Reexamination Certificate
2006-03-10
2008-12-16
Wright, Dirk (Department: 3681)
Interrelated power delivery controls, including engine control
Plural engines
Electric engine
Reexamination Certificate
active
07465250
ABSTRACT:
A method and article of manufacture is provided to control an automatic transmission which includes a hydraulic fluid circuit having an electrically-driven auxiliary hydraulic pressure pump. It includes determining the internal combustion engine is shut off during vehicle operation, and monitoring fluidic pressure at a plurality of locations in the hydraulic circuit. Operation of the electrically-driven auxiliary hydraulic pressure pump is commanded to an elevated voltage level when the engine is shut off and the fluidic pressures fail to register substantially proper pressure levels. It includes discontinuing operation of the electrically-driven auxiliary hydraulic pressure pump when the engine is subsequently commanded on, or when an elapsed measure of time has passed, or when the monitored fluidic pressures register substantially proper pressure levels.
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Tamai, Goro, et al; Saturn Engine Stop-Start System with Automatic Transmission, 2001, pp. 1-11, 2001-01-0326, Society of Automotive Engineers, Warrendale, PA, USA.
Aldrich, III William L.
Tamai Goro
Zerbini Mark A.
GM Global Technology Operations Inc.
Wright Dirk
LandOfFree
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