Engine sensor hydraulic control system

Details Engine sensor hydraulic control system Engine sensor hydraulic control system

1975-02-26

1976-08-24

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

60430, 60431, 60486, 91412, F15B 1800

Patent

active

039759091

ABSTRACT:
The disclosure relates to plural, motor driven hydraulic pump circuits, including circuits having the pumps in at least one circuit operated in pairs with all pumps being driven by a single prime mover. A speed responsive control device unloads one pump in one circuit when engine speed drops below a predetermined value without regard to the source of the condition causing the slowdown. Also included is a crossover means for sensing the pressure in aother circuit for preventing reloading of the unloaded pump when speed rises above the predetermined value unless and until the pressure including the pressure sensed in the other circuit is below a predetermined pressure.

REFERENCES:
patent: 2616264 (1952-11-01), Grant et al.
patent: 2797551 (1957-07-01), Adams et al.
patent: 3535877 (1970-10-01), Becker et al.
patent: 3540218 (1970-11-01), Finn

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