Method and apparatus for controlling hydraulic vehicle transmiss

Details Method and apparatus for controlling hydraulic vehicle transmiss Method and apparatus for controlling hydraulic vehicle transmiss

1986-02-27

1987-08-04

Krizmanich, George H.

192 clutches and power-stop control

Clutches

Operators

192 357, 192109F, F16D 2511

Patent

active

046840044

ABSTRACT:
The transmission control for a vehicle hydraulic transmission includes a sequence control valve that includes a shuttle valve and an interconnected sequence valve which are connected with speed and direction clutches of the transmission. The shuttle valve senses the drop in pressure in the direction clutches when they are shifted to actuate the sequence control valve to initially dump the speed clutch and then to keep that clutch disengaged until the direction clutch has fully re-engaged.

REFERENCES:
patent: 3198027 (1965-08-01), Ramsel et al.
patent: 3762518 (1973-10-01), Hilpert
patent: 3799308 (1974-03-01), Erisman
patent: 4046160 (1977-09-01), Horsch

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