Method of selecting a hydraulic metering mode for a function...

Details Method of selecting a hydraulic metering mode for a function... Method of selecting a hydraulic metering mode for a function...

2005-04-19

2005-04-19

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

C060S460000, C091S361000, C091S446000, C091S454000

Reexamination Certificate

active

06880332

ABSTRACT:
The flow of fluid to a hydraulic actuator is controlled by a valve assembly which operates in different metering modes at various points in time. The metering mode to use in selected in response to the hydraulic load that acts on the valve associated with the hydraulic actuator. Specifically the load is determined and then compared to threshold levels associated with the different metering modes to choose the metering mode for use a given point in time.

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Arne Jansson, et al., “Separate Controls of Meter-in and Meter-out Orifices in Mobile Hyraulic Systems,” SAE Technical Papers Series, Sep. 1999, pp. 1-7, SAE International, Warrendale, PA.

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