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SE9803914D0 - Positive flow control system - Google Patents

Positive flow control system

Info

Publication number
SE9803914D0
SE9803914D0 SE9803914A SE9803914A SE9803914D0 SE 9803914 D0 SE9803914 D0 SE 9803914D0 SE 9803914 A SE9803914 A SE 9803914A SE 9803914 A SE9803914 A SE 9803914A SE 9803914 D0 SE9803914 D0 SE 9803914D0
Authority
SE
Sweden
Prior art keywords
flow
control
centered
wasted
source
Prior art date
Application number
SE9803914A
Other languages
English (en)
Other versions
SE520038C2 (sv
SE9803914L (sv
Inventor
Michael A Cobo
Eric A Reiners
Richard G Ingram
Viele Matthew F Vande
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
Publication of SE9803914D0 publication Critical patent/SE9803914D0/sv
Publication of SE9803914L publication Critical patent/SE9803914L/sv
Publication of SE520038C2 publication Critical patent/SE520038C2/sv

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2282—Systems using center bypass type changeover valves
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6654—Flow rate control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
SE9803914A 1997-11-21 1998-11-17 System med positiv flödesreglering SE520038C2 (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/976,152 US5873244A (en) 1997-11-21 1997-11-21 Positive flow control system

Publications (3)

Publication Number Publication Date
SE9803914D0 true SE9803914D0 (sv) 1998-11-17
SE9803914L SE9803914L (sv) 1999-05-22
SE520038C2 SE520038C2 (sv) 2003-05-13

Family

ID=25523789

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9803914A SE520038C2 (sv) 1997-11-21 1998-11-17 System med positiv flödesreglering

Country Status (4)

Country Link
US (1) US5873244A (sv)
JP (1) JP4629168B2 (sv)
DE (1) DE19853948B4 (sv)
SE (1) SE520038C2 (sv)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6244158B1 (en) * 1998-01-06 2001-06-12 Fps, Inc. Open center hydraulic system with reduced interaction between branches
JP3750841B2 (ja) * 1998-11-12 2006-03-01 新キャタピラー三菱株式会社 作業機械における油圧制御装置
US6282891B1 (en) * 1999-10-19 2001-09-04 Caterpillar Inc. Method and system for controlling fluid flow in an electrohydraulic system having multiple hydraulic circuits
JP4707872B2 (ja) * 2001-05-02 2011-06-22 古河機械金属株式会社 油圧アクチュエータの制御装置
RU2193701C1 (ru) * 2001-12-21 2002-11-27 Копытин Сергей Иванович Секционный гидрораспределитель с пропорциональным электрогидравлическим управлением
RU2235923C2 (ru) * 2002-10-18 2004-09-10 Республиканское унитарное предприятие "Минский тракторный завод" Секционный золотниковый распределитель
US7331175B2 (en) * 2005-08-31 2008-02-19 Caterpillar Inc. Hydraulic system having area controlled bypass
US7320216B2 (en) * 2005-10-31 2008-01-22 Caterpillar Inc. Hydraulic system having pressure compensated bypass
US7614335B2 (en) * 2006-11-30 2009-11-10 Caterpillar Inc. Hydraulic system with variable standby pressure
US8209094B2 (en) * 2008-01-23 2012-06-26 Caterpillar Inc. Hydraulic implement system having boom priority
US7874151B2 (en) * 2008-03-17 2011-01-25 Caterpillar Inc Dual mode hydraulic circuit control and method
US8522543B2 (en) * 2008-12-23 2013-09-03 Caterpillar Inc. Hydraulic control system utilizing feed-forward control
KR20100134332A (ko) * 2009-06-15 2010-12-23 볼보 컨스트럭션 이큅먼트 에이비 건설장비의 조작레버 잠금장치
JP5563096B2 (ja) * 2012-05-18 2014-07-30 憲平 山路 油圧制御システム
US9410560B2 (en) * 2012-06-01 2016-08-09 Clark Equipment Company Control valve assembly
CA2926863A1 (en) 2013-10-29 2015-05-07 Raven Industries, Inc. Hydraulic displacement control system
US9403434B2 (en) 2014-01-20 2016-08-02 Posi-Plus Technologies Inc. Hydraulic system for extreme climates
CN104005446B (zh) * 2014-04-01 2016-03-16 上海海希工业通讯股份有限公司 挖掘机的正流量控制方法和系统及挖掘机
US9470246B1 (en) 2015-06-05 2016-10-18 Cnh Industrial America Llc Hydraulic actuation system for work machine
US10164889B1 (en) 2017-09-13 2018-12-25 Oracle International Corporation High throughput flow control
EP3880891A4 (en) * 2018-11-13 2022-08-03 Husco International, Inc. HYDRAULIC CONTROL SYSTEMS AND METHODS WITH MULTIFUNCTIONAL DYNAMIC CONTROL
CN111576513B (zh) * 2020-05-25 2022-08-12 江苏徐工工程机械研究院有限公司 平地机流量控制系统、方法、控制器和平地机

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Also Published As

Publication number Publication date
DE19853948B4 (de) 2009-09-24
SE520038C2 (sv) 2003-05-13
US5873244A (en) 1999-02-23
JP4629168B2 (ja) 2011-02-09
DE19853948A1 (de) 1999-05-27
JPH11230105A (ja) 1999-08-27
SE9803914L (sv) 1999-05-22

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