Method for controlling engine for driving hydraulic pump to oper

Details Method for controlling engine for driving hydraulic pump to oper Method for controlling engine for driving hydraulic pump to oper

1992-03-10

1994-02-15

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

By controlling internal combustion drive engine

417 42, 417 53, F04B 4900

Patent

active

052861716

ABSTRACT:
In a method for controlling an engine for driving a hydraulic pump to supply a pressurized fluid to at least one hydraulic actuator in a construction machinery, a fuel flow supplied to the engine is decreased so that an output rotational speed of the engine is decreased to decrease an excess output of the engine, and the fuel flow is increased to increase the output rotational speed of the engine when a load of the engine for driving the hydraulic pump is more than a first level after the engine output decreasing step.

REFERENCES:
patent: 3982508 (1976-09-01), Norlin et al.
patent: 4534707 (1985-08-01), Mitchell
patent: 4549400 (1985-10-01), King
patent: 4588357 (1986-05-01), McGraw et al.
patent: 4904161 (1990-02-01), Kamide et al.
patent: 5155996 (1992-10-01), Tatsumi et al.
Patent Abstracts of Japan, vol. 14, No. 540 (Nov. 29, 1990).

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