Transmission control system with improved modulating valve

Details Transmission control system with improved modulating valve Transmission control system with improved modulating valve

1975-02-10

1976-11-09

Wyche, Benjamin W.

192 clutches and power-stop control

Transmission control and clutch control

Common control

192109F, B60K 2100

Patent

active

039905535

ABSTRACT:
A hydraulic transmission control circuit includes a hydraulically responsive modulating valve for modulating a first fluid pressure and a differential valve for establishing a second fluid pressure communicated to a master clutch, the control circuit also including a manually controlled modulating valve for precisely adjusting the second pressure and for selectively adjusting the first fluid pressure during regulation of the second fluid pressure, the manual modulating valve also being adapted for selectively communicating the hydraulically responsive modulating valve with a drain in order to assure a proper rate of modulation for both the first and second fluid pressures.

REFERENCES:
patent: 3137311 (1964-06-01), Rohweder et al.
patent: 3468194 (1969-09-01), Horsch et al.
patent: 3882980 (1975-05-01), Blake

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