System and method for controlling an independent metering valve

Details System and method for controlling an independent metering valve System and method for controlling an independent metering valve

1998-07-02

1999-09-07

Michalsky, Gerald A.

Fluid handling

Processes

91433, 91454, 91459, 13759617, F15B 1302

Patent

active

059471409

ABSTRACT:
A system and method for controlling an independent metering valve operating in a hydraulic circuit determines a displacement command for one or more metering valves to provide desired flows through the metering valves and desired pressure drops across the metering valves. The system determines the displacement command based on a mode of operation of the hydraulic circuit and a velocity for a hydraulic device controlled by the hydraulic circuit. The system determines the displacement command further based on an amount of flow available to the hydraulic circuit. The system allows the hydraulic circuit to be electronically controlled thereby providing flexibility not found in conventional hydraulic control systems.

REFERENCES:
patent: 4970941 (1990-11-01), Reinhardt
patent: 5261234 (1993-11-01), Holloway et al.
patent: 5678470 (1997-10-01), Koehler et al.
patent: 5701793 (1997-12-01), Gardner et al.

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