Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Reexamination Certificate
2008-01-01
2008-01-01
Estremsky, Sherry (Department: 3681)
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
C477S144000, C477S148000
Reexamination Certificate
active
07314428
ABSTRACT:
An automotive automatic transmission control system is provided which is designed to increase the output of an engine in response to a driver's request to downshift a transmission for setting up the engine braking and to load the amount of working fluid to an on-coming clutch quickly during the downshift. The system works to determine whether the loaded amount of working fluid is excessive or lacking using the speeds of an input shaft of the transmission and the engine to correct the amount of working fluid to be used upon a subsequent downshift request. The use of the two speeds enables the fact that the loaded fluid amount is excessive which arises from a rise in the speed of the input shaft caused by the engine output increasing control, not by completion of the loading of the working fluid to the on-coming clutch to be found accurately.
REFERENCES:
patent: 5722913 (1998-03-01), Gierer
patent: 2002/0019292 (2002-02-01), Popp et al.
patent: H05-338469 (1993-12-01), None
patent: H06-235451 (1994-08-01), None
patent: 2002-310277 (2002-10-01), None
Kozaki Tetsuji
Murakawa Takaji
Nakajima Nobuyori
Denso Corporation
Estremsky Sherry
Nixon & Vanderhye P.C.
Young Edwin A
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