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US 6,913,554 B2Granted
Methods and systems for improving the operation of transmissions for motor vehicles
OwnerGilbert W. Youngerinventor
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OwnerGilbert W. Youngerinventor
Estimating the term…
The present invention is directed to methods and systems for improving the operation of transmissions for automotive vehicles, and in particular the “factory installed” automotive transmissions installed by the original automobile manufacturer. The methods and systems in accordance with the present invention modify both the structural components and the hydraulic circuitry of the original automotive transmissions to enhance the operation of the modified transmissions. The improvements to the operation of the “factory installed” transmissions, and in particular the Allison transmission, include modification of the flow control valve to increase line pressure during lockup; modifications to the rotating clutch module to increase the torque held by the clutch and prevent clutch slippage, and modifications to the trim valves to adjust the pressure applied to the clutches for more efficient operation of the transmission.
A method of modifying the hydraulic circuitry of a factory installed Allison automotive transmission including a trim solenoid for applying fluid pressure to a trim valve, said trim valve coupled to a source of clutch fluid pressure for opposing the fluid pressure applied by said trim solenoid for moving said trim valve into a position in which it blocks said source of clutch fluid pressure for establishing a predetermined maximum clutch pressure for said factory installed transmission;
Dependencies are inferred from the claim text.