CONTROL METHOD AND DEVICE FOR BY-PASS VALVE OF FLUID CIRCUIT

PROBLEM TO BE SOLVED: To provide a method and a device to control a flow rate of fluid in a fluid circuit 102. SOLUTION: A fluid circuit 102 includes a pump 32 to be driven by an engine 106. The pump 32 supplies fluid to at least one of actuators 44, 45 through valve assembly bodies 120, 122. Additi...

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Bibliographic Details
Main Authors MICHAEL A COBO, KOEHLER DOUGLAS W
Format Patent
LanguageEnglish
Published 17.04.2001
Edition7
Subjects
BLASTING
DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
DREDGING
FIXED CONSTRUCTIONS
FLUID-PRESSURE ACTUATORS
FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS
FOUNDATIONS
HEATING
HYDRAULIC ENGINEERING
HYDRAULICS OR PNEUMATICS IN GENERAL
LIGHTING
MECHANICAL ENGINEERING
SOIL SHIFTING
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To provide a method and a device to control a flow rate of fluid in a fluid circuit 102. SOLUTION: A fluid circuit 102 includes a pump 32 to be driven by an engine 106. The pump 32 supplies fluid to at least one of actuators 44, 45 through valve assembly bodies 120, 122. Additionally, the pump is connected to a by-pass control valve, and the by-pass control valve is connected to a fluid tank. This method includes a step to define a desired flow rate of fluid to be supplied by the pump, a step to find an estimated flow rate of fluid to be supplied by the pump in correspondence with the desired flow rate of fluid and a step to decide a position of the by-pass control valve in correspondence with the estimated flow rate of fluid.
Bibliography:Application Number: JP20000287069