DE69602923D1 - Elektrohydraulische proportionale steuerventilvorrichtung - Google Patents

Elektrohydraulische proportionale steuerventilvorrichtung

Info

Publication number
DE69602923D1
DE69602923D1 DE69602923T DE69602923T DE69602923D1 DE 69602923 D1 DE69602923 D1 DE 69602923D1 DE 69602923 T DE69602923 T DE 69602923T DE 69602923 T DE69602923 T DE 69602923T DE 69602923 D1 DE69602923 D1 DE 69602923D1
Authority
DE
Germany
Prior art keywords
control valve
valve device
proportional control
electrohydraulic proportional
electrohydraulic
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 - Lifetime
Application number
DE69602923T
Other languages
English (en)
Other versions
DE69602923T2 (de
DE69602923T3 (de
Inventor
Stephen Turner
David Lakin
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.)
Ultronics Ltd
Original Assignee
Ultronics Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10770283&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69602923(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ultronics Ltd filed Critical Ultronics Ltd
Application granted granted Critical
Publication of DE69602923D1 publication Critical patent/DE69602923D1/de
Publication of DE69602923T2 publication Critical patent/DE69602923T2/de
Publication of DE69602923T3 publication Critical patent/DE69602923T3/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/167—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load using pilot pressure to sense the demand
    • 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
    • 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
    • E02F9/2025—Particular purposes of control systems not otherwise provided for
    • 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
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/163—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3057—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having two valves, one for each port of a double-acting output member
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/575—Pilot pressure 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
    • 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
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
    • 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
    • F15B2211/634—Electronic controllers using input signals representing a state of a valve
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Servomotors (AREA)
  • Fluid-Pressure Circuits (AREA)
DE69602923T 1995-02-25 1996-02-22 Elektrohydraulische proportionale steuerventilvorrichtung Expired - Lifetime DE69602923T3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9503854.3A GB9503854D0 (en) 1995-02-25 1995-02-25 Electrohydraulic proportional control valve assemblies
GB9503854 1995-02-25
PCT/GB1996/000393 WO1996027051A1 (en) 1995-02-25 1996-02-22 Electrohydraulic proportional control valve assemblies

Publications (3)

Publication Number Publication Date
DE69602923D1 true DE69602923D1 (de) 1999-07-22
DE69602923T2 DE69602923T2 (de) 1999-12-09
DE69602923T3 DE69602923T3 (de) 2008-05-21

Family

ID=10770283

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69602923T Expired - Lifetime DE69602923T3 (de) 1995-02-25 1996-02-22 Elektrohydraulische proportionale steuerventilvorrichtung

Country Status (8)

Country Link
EP (1) EP0809737B2 (de)
JP (2) JPH11501106A (de)
KR (1) KR100432381B1 (de)
CN (1) CN1070974C (de)
DE (1) DE69602923T3 (de)
DK (1) DK0809737T4 (de)
GB (2) GB9503854D0 (de)
WO (1) WO1996027051A1 (de)

Families Citing this family (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1798346B1 (de) * 1996-02-28 2010-12-22 Komatsu Ltd. Steuervorrichtung für eine Hydraulikantriebsmaschine
GB9717713D0 (en) * 1997-08-22 1997-10-29 Ultronics Limited An electrohydraulic proportional control valve assembly
US6202014B1 (en) * 1999-04-23 2001-03-13 Clark Equipment Company Features of main control computer for a power machine
DE50203452D1 (de) 2001-03-21 2005-07-28 Bucher Hydraulics Gmbh Wegeventil
US6763661B2 (en) 2002-05-07 2004-07-20 Husco International, Inc. Apparatus and method for providing vibration to an appendage of a work vehicle
AU2003259422A1 (en) * 2002-08-28 2004-03-19 Bucher Hydraulics Gmbh Hydraulic drive for a control valve
DE10259146A1 (de) * 2002-12-18 2004-07-15 Georg Sebode Aufzug mit einem hydraulischen Antrieb
DE10330869A1 (de) * 2003-07-09 2005-02-17 Hydac System Gmbh Hydraulisches System
DE10340504B4 (de) * 2003-09-03 2006-08-24 Sauer-Danfoss Aps Ventilanordnung zur Steuerung eines Hydraulikantriebs
DE10340506B4 (de) 2003-09-03 2006-05-04 Sauer-Danfoss Aps Ventilanordnung zur Steuerung eines Hydraulikantriebes
DE10340505B4 (de) * 2003-09-03 2005-12-15 Sauer-Danfoss Aps Ventilanordnung zur Steuerung eines Hydraulikantriebs
DE10344480B3 (de) 2003-09-24 2005-06-16 Sauer-Danfoss Aps Hydraulische Ventilanordnung
DE102004050294B3 (de) 2004-10-15 2006-04-27 Sauer-Danfoss Aps Hydraulische Ventilanordnung
KR100641393B1 (ko) 2004-12-07 2006-11-01 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 유압제어회로 및 유압제어방법
DE102005022891A1 (de) 2005-04-05 2006-10-12 Bosch Rexroth Aktiengesellschaft Hydraulische Steueranordnung und Steuerblock
DE102005045035B4 (de) * 2005-09-21 2007-07-12 Wessel-Hydraulik Gmbh Hydraulische Schaltungsanordnung zur Versorgung eines doppelt wirkenden hydraulischen Verbrauchers
CN100370149C (zh) * 2006-01-24 2008-02-20 东北大学 恒定背压及比例控制的熔压设备液压压下系统
JP4703419B2 (ja) * 2006-01-31 2011-06-15 カヤバ工業株式会社 油圧アクチュエータ用制御回路
US7487707B2 (en) 2006-09-27 2009-02-10 Husco International, Inc. Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve
DE102007048697A1 (de) * 2007-10-11 2009-04-16 Deere & Company, Moline Hydraulische Hubeinrichtung
US8695333B2 (en) 2007-12-12 2014-04-15 Volvo Construction Equipment Ab Method for when necessary automatically limiting a pressure in a hydraulic system during operation
DE102008002422A1 (de) * 2008-06-13 2009-12-17 Zf Friedrichshafen Ag Hydraulikversorgungssystem zur Versorgung eines hydraulischen Verbrauchers mit wenigstens einem Verbrauchsbereich
US8359849B2 (en) * 2009-04-07 2013-01-29 Eaton Corporation Control of a fluid circuit using an estimated sensor value
DE102009033645A1 (de) * 2009-07-17 2011-01-20 Robert Bosch Gmbh Hydraulische Steueranordnung
GB2472004A (en) * 2009-07-20 2011-01-26 Ultronics Ltd Control arrangement for controlling movement of a differential piston in a hydraulic circuit
US8291925B2 (en) 2009-10-13 2012-10-23 Eaton Corporation Method for operating a hydraulic actuation power system experiencing pressure sensor faults
US8375989B2 (en) * 2009-10-22 2013-02-19 Eaton Corporation Method of operating a control valve assembly for a hydraulic system
CN103370546B (zh) * 2010-11-08 2018-06-26 罗伯特·博世有限公司 用于对具有调节或分配阀的阀门进行操纵的液压或气动的驱动装置
US8857168B2 (en) 2011-04-18 2014-10-14 Caterpillar Inc. Overrunning pump protection for flow-controlled actuators
DE102011114241B4 (de) * 2011-06-09 2014-09-04 Sms Meer Gmbh Hydraulische Antriebsvorrichtung, Hydraulische Endstufe eines hydraulischen Servo-Regelventils, Servo-Regelventil und Pulverpresse
CN102536194B (zh) * 2011-12-13 2014-05-28 中国石油集团长城钻探工程有限公司 一种液压驱动的恒钻压自动送钻控制系统
CN102535571A (zh) * 2012-02-17 2012-07-04 上海三一重机有限公司 一种基于双阀芯的液压挖掘机再生控制系统及方法
CN102587443A (zh) * 2012-02-23 2012-07-18 上海三一重机有限公司 一种履带式挖掘机多路阀液压控制系统
CN102678663B (zh) * 2012-05-30 2015-05-20 上海三一重机有限公司 一种挖掘机用油缸及带有该油缸的挖掘机
US9145660B2 (en) * 2012-08-31 2015-09-29 Caterpillar Inc. Hydraulic control system having over-pressure protection
CN102888873B (zh) * 2012-09-12 2015-03-11 徐州徐工挖掘机械有限公司 一种提高挖掘机复合动作时直线行走性能的装置
CN103122648B (zh) * 2012-12-28 2015-06-17 上海三一重机有限公司 一种多路阀液压控制系统及直线行走控制阀及挖掘机
CN103256334B (zh) * 2013-04-28 2016-06-22 潍坊威度电子科技有限公司 基于电磁数字阀的双作用液压油缸拖拉机悬挂液压系统
DK2811174T3 (da) 2013-06-04 2020-10-12 Danfoss Power Solutions Aps Styringsarrangement for et hydrauliksystem og en fremgangsmåde til styring af et hydrauliksystem
US8977445B2 (en) * 2013-06-18 2015-03-10 Caterpillar Inc. System and method for dig detection
CN103644172B (zh) 2013-12-20 2015-12-30 徐州重型机械有限公司 一种起重机伸缩油缸检测及保护装置和方法
CN104564863B (zh) * 2014-12-26 2017-02-22 大连理工大学 一种管片拼装机回转运动电液控制系统
JP6324347B2 (ja) * 2015-06-01 2018-05-16 日立建機株式会社 建設機械の油圧制御装置
WO2017061648A1 (ko) * 2015-10-08 2017-04-13 볼보 컨스트럭션 이큅먼트 에이비 스풀 밸브
US9713307B1 (en) 2016-01-21 2017-07-25 Deere & Company Electrohydraulic dynamic spool position control for a proportional valve in a work vehicle
CN105862962B (zh) * 2016-05-31 2018-05-18 青岛雷沃工程机械有限公司 降低回油背压的液压回路
US10330126B2 (en) 2016-12-16 2019-06-25 Caterpillar Inc. Fan control system with electro-hydraulic valve providing three fan motor operational positions
CN107387477B (zh) * 2017-07-20 2018-11-06 徐州工业职业技术学院 一种用于滑阀的先导控制装置、液压缸控制回路
WO2019157429A1 (en) * 2018-02-12 2019-08-15 Parker-Hannifin Corporation Hydraulic control valve configured to use a pilot signal as a substitute load-sense signal
LT4218378T (lt) * 2018-03-08 2024-06-25 Precision Planting Llc Žemės ūkio sodinamosios mašinos sėjos sekcija su skysčio reguliavimo sistema
CN108953306B (zh) * 2018-08-26 2021-01-08 燕山大学 双联泵直驱式容积控制电液伺服控制系统
CN108868793B (zh) * 2018-09-17 2023-09-01 中国铁建重工集团股份有限公司 一种盾构机主驱动高压密封系统和一种泥水平衡盾构机
EP3670931A1 (de) * 2018-12-17 2020-06-24 Hyva Holding BV Hydraulisches steuerungssystem
JP7400552B2 (ja) * 2020-03-06 2023-12-19 コベルコ建機株式会社 作業機械の油圧駆動装置
CN112096670A (zh) * 2020-09-21 2020-12-18 广东海德利森一氢科技有限公司 一种液压系统及液压压力控制方法
JP2022124642A (ja) * 2021-02-16 2022-08-26 株式会社小松製作所 作業機械のブーム制御システム

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US33846A (en) * 1861-12-03 Improved mode of heating molds
EP0038128A1 (de) * 1980-04-04 1981-10-21 General Signal Corporation Elektrohydraulisches Servosteuerungssystem
DE3347000A1 (de) * 1983-12-24 1985-07-04 Robert Bosch Gmbh, 7000 Stuttgart Elektrohydraulische einrichtung zur steuerung eines doppeltwirkenden hydromotors
JP2828490B2 (ja) * 1990-06-19 1998-11-25 日立建機株式会社 ロードセンシング油圧駆動回路の制御装置
US5138838A (en) * 1991-02-15 1992-08-18 Caterpillar Inc. Hydraulic circuit and control system therefor
DE4122164C1 (de) * 1991-07-04 1993-01-14 Danfoss A/S, Nordborg, Dk
JPH05256303A (ja) * 1992-01-15 1993-10-05 Caterpillar Inc 油圧回路制御装置

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EP0809737B1 (de) 1999-06-16
DE69602923T2 (de) 1999-12-09
EP0809737B2 (de) 2007-09-19
GB2298291A (en) 1996-08-28
CN1070974C (zh) 2001-09-12
WO1996027051B1 (en) 2001-04-12
KR100432381B1 (ko) 2004-09-16
GB2298291C (en) 2008-02-26
JPH11501106A (ja) 1999-01-26
DK0809737T3 (da) 1999-11-22
CN1175988A (zh) 1998-03-11
DE69602923T3 (de) 2008-05-21
GB2298291B (en) 1998-06-10
JP2006177561A (ja) 2006-07-06
GB9503854D0 (en) 1995-04-19
KR19980702483A (ko) 1998-07-15
WO1996027051A1 (en) 1996-09-06
EP0809737A1 (de) 1997-12-03
DK0809737T4 (da) 2008-01-07
GB9603811D0 (en) 1996-04-24

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