Transmission control system with improved modulation rate regula

Details Transmission control system with improved modulation rate regula Transmission control system with improved modulation rate regula

1981-05-08

1983-12-27

Dorner, Kenneth

192 clutches and power-stop control

Transmission control and clutch control

Common control

192 363, 192109F, 74752C, 74335, B60K 4100

Patent

active

044225369

ABSTRACT:
A power shift transmission control system includes a modulation control valve connected for regulating the pressure engagement of forward and reverse direction-friction devices and including a pressure-regulating spring which is adjusted by means of a pressure boost piston. A feedback conduit conveys fluid pressure from the forward or reverse direction-friction device to the chamber, and the rate at which this pressure is conveyed to the chamber is controlled by an orifice-selector valve which is operative to selectively place various sized orifices in the feedback conduit in response to the speed-selector valve being placed in the various speed positions.

REFERENCES:
patent: 3468194 (1969-09-01), Horsch
patent: 3487851 (1970-01-01), Golan
patent: 3709065 (1973-01-01), Starling
patent: 3789698 (1974-02-01), Williams
patent: 3799308 (1974-03-01), Erisman
patent: 3882980 (1975-05-01), Blake
patent: 3944035 (1976-03-01), McRay
patent: 4046160 (1977-09-01), Horsch
patent: 4138004 (1979-02-01), Horsch

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