DE3279180D1 - Dual control input flow control valve - Google Patents

Dual control input flow control valve

Info

Publication number
DE3279180D1
DE3279180D1 DE8282901677T DE3279180T DE3279180D1 DE 3279180 D1 DE3279180 D1 DE 3279180D1 DE 8282901677 T DE8282901677 T DE 8282901677T DE 3279180 T DE3279180 T DE 3279180T DE 3279180 D1 DE3279180 D1 DE 3279180D1
Authority
DE
Germany
Prior art keywords
control
pressure
differential
valve
response
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8282901677T
Other languages
German (de)
Inventor
Tadeusz Budzich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Inc
Original Assignee
Caterpillar Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Inc filed Critical Caterpillar Inc
Application granted granted Critical
Publication of DE3279180D1 publication Critical patent/DE3279180D1/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Flow Control (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The valve bypasses fluid supplied from the pump either in response to one control input e.g. variation in the area of metering orifice. This controls a constant pressure differential, at a preselected level between valve inlet pressure and the load pressure, or in a response to another control input, e.g. modification in the pressure of control signal. This varies the level of the control differential between valve inlet pressure and the load pressure, while this control differential is automatically maintained constant at each controlled level by the valve controls receiving low energy control signals to their amplifying stage. In this way a load can be controlled in response to either input providing identical control performance, or the variable pressure differential control can be superimposed on the control action controlling fluid flow by variation in the area of the metering orifice.
DE8282901677T 1982-04-19 1982-04-19 Dual control input flow control valve Expired DE3279180D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1982/000481 WO1983003644A1 (en) 1982-04-19 1982-04-19 Dual control input flow control valve

Publications (1)

Publication Number Publication Date
DE3279180D1 true DE3279180D1 (en) 1988-12-08

Family

ID=22167939

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282901677T Expired DE3279180D1 (en) 1982-04-19 1982-04-19 Dual control input flow control valve

Country Status (4)

Country Link
EP (1) EP0113708B1 (en)
JP (1) JPS59500574A (en)
DE (1) DE3279180D1 (en)
WO (1) WO1983003644A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL169628C (en) * 1971-06-29 1982-08-02 Ind En Handelmaatschappij Kopp CONTROL DEVICE FOR LAST-DEPENDENT CONTROL OF HYDRAULIC DRIVE DEVICES.
JPS4828884A (en) * 1971-08-19 1973-04-17
US4153075A (en) * 1975-11-26 1979-05-08 Tadeusz Budzich Load responsive control valve
US4282898A (en) * 1979-11-29 1981-08-11 Caterpillar Tractor Co. Flow metering valve with operator selectable boosted flow
US4330991A (en) * 1980-01-02 1982-05-25 Tadeusz Budzich Load responsive system controls
US4285195A (en) * 1980-01-02 1981-08-25 Tadeusz Budzich Load responsive control system
US4327627A (en) * 1980-01-07 1982-05-04 Tadeusz Budzich Load responsive fluid control valve
US4327763A (en) * 1980-01-11 1982-05-04 Tadeusz Budzich Dual control input flow control valve
US4325289A (en) * 1980-01-11 1982-04-20 Tadeusz Budzich Load responsive fluid control valve
US4333389A (en) * 1980-01-18 1982-06-08 Tadeusz Budzich Load responsive fluid control valve

Also Published As

Publication number Publication date
WO1983003644A1 (en) 1983-10-27
EP0113708A4 (en) 1986-02-10
JPS59500574A (en) 1984-04-05
EP0113708B1 (en) 1988-11-02
EP0113708A1 (en) 1984-07-25

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee