Method to detect uncommanded spool valve positioning and stop fluid flow to hydraulic actuators

Method to detect uncommanded spool valve positioning and stop fluid flow to hydraulic actuators

A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is disclosed. The method may comprise receiving a signal fluid pre...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Callaway, Joshua D, Lomax, David J
Format: Patent
Sprache:eng
Schlagworte:
ACTUATING-FLOATS
BLASTING
COCKS
CONTROLLING
DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
FLUID-PRESSURE ACTUATORS
FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
HYDRAULICS OR PNEUMATICS IN GENERAL
LIGHTING
MECHANICAL ENGINEERING
PHYSICS
REGULATING
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
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Beschreibung
Zusammenfassung:A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is disclosed. The method may comprise receiving a signal fluid pressure detected in a signal passageway, identifying whether at least one activation command is currently enabled, and stopping the flow of fluid to the plurality of hydraulic actuators if no activation command is enabled for any of the plurality of valve spools, and the signal fluid pressure when detected (1) upstream of the plurality of valve spools is greater than a first threshold or (2) downstream of the plurality of valve spools is less than a second threshold.