Control system for a hydrostatic drive

Details Control system for a hydrostatic drive Control system for a hydrostatic drive

1978-06-22

1980-03-25

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Condition responsive control of or by input to input pump...

60445, 60447, 60494, F16D 3100, F16H 3946

Patent

active

041943627

ABSTRACT:
The control system has an adjustable flow-rate pump and a fixed flow-rate pump which is supplied with hydraulic fluid via a supply conduit. A first throttle is interposed in this conduit and produces first signals in form of pressure differentials in dependence upon variations in the rotational speed of an ungoverned combustion engine which powers the hydraulic drive, which signals trigger flow-rate adjustments of the main pump. A second throttle is also interposed in the supply conduit and produces second signals in form of pressure differentials in dependence upon variations in the load upon the hydraulic motor of the hydraulic drive, which signals trigger movements of the throttle flap of the internal combustion engine towards the open or closed position thereof.

REFERENCES:
patent: 3986357 (1976-10-01), Hoffmann
patent: 3986358 (1976-10-01), Hoffmann
patent: 4118931 (1978-10-01), Nonnenmacher et al.

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