Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake
Patent
1997-06-09
1999-10-19
Marmor, Charles A.
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid controlled mechanical clutch or brake
477137, 477142, F16H 6126
Patent
active
059679280
ABSTRACT:
The present invention is directed to methods and systems for improving the operation of a transmission for an automotive vehicle, and in particular the transmission as installed by the original automobile manufacturer. The methods and systems of the present invention modify the original hydraulic fluid circuits of the automotive transmission provided by the automobile manufacturer to enable the transmission to select first gear at any time, and to enable the transmission to produce quick applies during upshifts and fast releases during downshifts for high performance operation with only minimum ratio sharing or overlap during gear changes. The modification of the original automotive transmission to achieve these goals includes modification of the hydraulic fluid circuits of the factory installed transmission; by enlarging the size of pre-existing orifices and by plugging other orifices; and by adjusting pre-existing spring and pressure values for adjusting the fluid flow and operation of the original factory installed automotive transmission.
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Hydra-Matic 4L80-E-Technicians Guide, General Motors Corporation, 1990.
Lund Scott
Marmor Charles A.
Stone Mark P.
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