Hydraulic circuit with load sensing feature

Details Hydraulic circuit with load sensing feature Hydraulic circuit with load sensing feature

1995-06-28

1997-04-01

Ryznic, John E.

Power plants

Pressure fluid source and motor

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

60486, F16D 3102

Patent

active

056155530

ABSTRACT:
A hydraulic circuit has a first PV pump connected to a valve group for powering a plurality of hydraulic mechanisms connected to the group, and a second PF pump connected in the circuit. In the improvement, a hydraulic line extends between the second pump and the valve group and there is a conductor sensing a mechanism load pressure. A valve network directs flow from the second pump to the valve group when the difference between the pressure in the hydraulic line and the load pressure declines below a predetermined value. Such decline "signals" that the mechanisms require more fluid than is available from the first pump alone. A new method for supplementing the flow of a first pump with that of a second pump is also disclosed.

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