Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1994-08-16
1996-07-16
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477150, 74606R, F16H 6104, F16H 6108
Patent
active
055362214
ABSTRACT:
A valve is provided in one of the accumulator oil passageways provided between the servo and the 2-3 shift valve of an automatic transmission to partially restrict or control the flow of oil to and from the servo and clutch, thus adjusting the timing of shifts from second to third gear. The added valve or metering device would allow for a size increase of an orifice from the manual valve while maintaining proper timing of the apply/release of the 3-4 clutch and 2-4 band. The invention allows larger oil volume for both apply/release of the 3-4 clutch and 2-4 band, decreasing clutch failures and increasing transmission life expectancy. The invention is particularly advantageous with THM 700-R4 and 4L60-E automatic transmissions for 4-, 6- or 8-cylinder vehicles.
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"Principles of Operation of THM 700-R4 Hydra-matic Transmissions," Chevrolet Division of General Motors Corp., First Edition 1981, pp. 58, 60-63, 78-79, 84-85.
Deltrans Inc.
Ta Khoi Q.
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