Hydraulic pump control system

Details Hydraulic pump control system Hydraulic pump control system

1997-12-22

1999-08-31

Freay, Charles G.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

60430, 60449, F04B 126, F16D 3102

Patent

active

059444924

ABSTRACT:
A hydraulic pump control system is shown that can control the absorbing torque of a hydraulic pump with respect to the engine power for driving the hydraulic pump in a well-balanced manner, and reduce a deviation of an actual revolution number from a target revolution number of the engine. A torque of hydraulic pumps during operation is estimated from a pump pressure and first and second line pressures. Based on the estimated torque, an output torque of the hydraulic pumps is controlled so that an error between a target revolution number and an actual revolution number of the engine becomes null.

REFERENCES:
patent: 4809504 (1989-03-01), Izumi et al.
patent: 5266756 (1993-11-01), Hatano
patent: 5527156 (1996-06-01), Song

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