Method and apparatus for controlling hydraulic systems of constr

Details Method and apparatus for controlling hydraulic systems of constr Method and apparatus for controlling hydraulic systems of constr

1994-10-05

1996-07-30

Gluck, Richard E.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 53, 417326, F04B 4900

Patent

active

055405541

ABSTRACT:
A controller regulates a hydraulic pump for hydraulic equipment to allow long-term use of environmentally safe hydraulic fluids. This is accomplished by limiting the hydraulic pump power output to a level established to prevent the operating temperature from exceeding a specified level. A manual mode for switching between power curves permits alternate use of hydraulic fluids having different maximum operating temperatures. An automatic mode detects the type of hydraulic fluid and automatically selects and applies a suitable power mode curve to limit the maximum operating temperature to a value suitable for the detected type of fluid.

REFERENCES:
patent: 4388043 (1983-06-01), Preiss

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