Control device for a variable displacement hydrostatic machine

Details Control device for a variable displacement hydrostatic machine Control device for a variable displacement hydrostatic machine

1990-07-30

1991-09-10

Bertsch, Richard A.

Pumps

Condition responsive control of drive transmission or pump...

Plural pumps with individual or relative control

60452, 417218, F04B 4908

Patent

active

050469266

ABSTRACT:
A control device for a variable displacement hydrostatic machine having a stroke-volume regulator which is responsive to an actuating pressure. The control device includes a booster pump. The delivery pressure of the machine is the actuating pressure unless the delivery pressure of the machine is insufficient in which case the actuating pressure is a feed pressure produced by the booster pump. The control device includes a plurality of delivery-pressure lines and a proportioning pressure regulator having an outlet pressure which is proportionally reduced relative to the intake pressure connected between each delivery-pressure line and the stroke-volume regulator.

REFERENCES:
patent: 3846982 (1974-11-01), Rometsch et al.
patent: 4094144 (1978-06-01), Italy
patent: 4292805 (1981-10-01), Acheson
patent: 4408453 (1983-10-01), Westveer
patent: 4543787 (1985-10-01), Eckhardt
patent: 4559779 (1985-12-01), Krusche
patent: 4810171 (1989-03-01), Krebs

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