Apparatus for and method of controlling engine and pumps of hydr

Details Apparatus for and method of controlling engine and pumps of hydr Apparatus for and method of controlling engine and pumps of hydr

1994-11-04

1996-06-18

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417 34, 417 53, 417212, 417213, 417216, 60449, 60452, F04B 4106

Patent

active

055271561

ABSTRACT:
An apparatus for and a method of controlling the engine and pumps of hydraulic construction equipment capable of achieving automation of the hydraulic construction equipment by controlling the oil quantity fed to solenoid controlled proportional valves such that it is proportional to the manipulation amount of a manipulation command unit through a computation performed by a controller on the basis of engine RPM data from an engine RPM detection unit and pump delivery pressure variation data from a pump delivery pressure detection units so that the suction horse power of each of the pumps corresponds to the maximum output horse power of the engine and by controlling the oil quantity fed to the hydraulic cylinders 105a and 105b by oil quantity control valves such that it corresponds to the manipulation amount and manipulation ratio from the manipulation command unit.

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patent: 5197860 (1993-03-01), Nishida et al.
patent: 5226800 (1993-07-01), Morino
patent: 5352095 (1994-10-01), Tanaka et al.

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