Regulator for an adjustable hydrostatic machine

Details Regulator for an adjustable hydrostatic machine Regulator for an adjustable hydrostatic machine

1987-12-15

1989-03-07

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

60447, F04B 126

Patent

active

048101710

ABSTRACT:
A regulator for an adjustable hydrostatic machine (1) having a hydraulic servo controller (4) for continuous variation of the displacement volume, with a valve device (16, 18) for controlling or regulating the servo controller (4) in dependence on the displacement volume and/or working pressure of the hydrostatic machine (1) and a second regulating valve (15) for regulating the servo controller (4) in dependence on the displacement volume, is arranged so that it can be operated without significant regulating losses in the working stream. This is done by providing a third control valve (48), controlled in dependence on the control movement of the servo controller (4), to control the pressure acting on the second regulating valve (15).

REFERENCES:
patent: 3384019 (1968-05-01), Ifield et al.
patent: 3407738 (1968-10-01), Bosch
patent: 4077744 (1978-03-01), Pensa
patent: 4518321 (1985-05-01), Schniederjan
patent: 4639195 (1987-01-01), Norskau et al.
patent: 4668171 (1987-05-01), Beutler et al.

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