Transmission control with governor discontinuance control valve

Details Transmission control with governor discontinuance control valve Transmission control with governor discontinuance control valve

1976-11-12

1977-09-27

Geoghegan, Edgar W.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

F16H 5710

Patent

active

040503305

ABSTRACT:
A transmission control for a multi-speed transmission having governor pressure controlled shift valves for controlling interchange of speed ratios. A downshift control valve is disposed in the transmission control between one shift valve and the automatic low speed ratio drive establishing device to prevent automatic downshifting to the low speed ratio from a higher speed ratio, separated therefrom by at least one step, upon sudden discontinuance of or reduction in governor pressure.

REFERENCES:
patent: 3509784 (1970-05-01), Mahoney
patent: 3525275 (1970-08-01), Lemieux
patent: 3730022 (1973-05-01), O'Malley

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