DE69306738D1 - Hydraulisches antriebsystem - Google Patents

Hydraulisches antriebsystem

Info

Publication number
DE69306738D1
DE69306738D1 DE69306738T DE69306738T DE69306738D1 DE 69306738 D1 DE69306738 D1 DE 69306738D1 DE 69306738 T DE69306738 T DE 69306738T DE 69306738 T DE69306738 T DE 69306738T DE 69306738 D1 DE69306738 D1 DE 69306738D1
Authority
DE
Germany
Prior art keywords
drive system
hydraulic drive
hydraulic
drive
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
DE69306738T
Other languages
English (en)
Other versions
DE69306738T2 (de
Inventor
Toichi Hirata
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co 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
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Application granted granted Critical
Publication of DE69306738D1 publication Critical patent/DE69306738D1/de
Publication of DE69306738T2 publication Critical patent/DE69306738T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • E02F9/2232—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
    • 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
    • F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
    • 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
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low 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
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control 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
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single 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
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid 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
    • F15B2211/30—Directional control
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/351—Flow control by regulating means in feed line, i.e. meter-in 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41563—Flow control characterised by the connections of the flow 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid 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
    • F15B2211/40—Flow control
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow 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
    • F15B2211/505—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
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
    • F15B2211/60—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
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means

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)
  • Operation Control Of Excavators (AREA)
DE69306738T 1992-03-09 1993-03-09 Hydraulisches antriebsystem Expired - Lifetime DE69306738T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5076592 1992-03-09
PCT/JP1993/000287 WO1993018308A1 (en) 1992-03-09 1993-03-09 Hydraulically driving system

Publications (2)

Publication Number Publication Date
DE69306738D1 true DE69306738D1 (de) 1997-01-30
DE69306738T2 DE69306738T2 (de) 1997-04-03

Family

ID=12867937

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69306738T Expired - Lifetime DE69306738T2 (de) 1992-03-09 1993-03-09 Hydraulisches antriebsystem

Country Status (6)

Country Link
US (1) US5394697A (de)
EP (1) EP0597109B1 (de)
JP (1) JP3204977B2 (de)
KR (1) KR970000243B1 (de)
DE (1) DE69306738T2 (de)
WO (1) WO1993018308A1 (de)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1071854C (zh) * 1995-07-10 2001-09-26 日立建机株式会社 液压驱动***
US5540049A (en) * 1995-08-01 1996-07-30 Caterpillar Inc. Control system and method for a hydraulic actuator with velocity and force modulation control
JP3545111B2 (ja) * 1995-09-27 2004-07-21 日立建機株式会社 定圧力制御液圧駆動装置
CN1166192A (zh) * 1995-10-09 1997-11-26 新卡特彼勒三菱株式会社 用于建筑机械的控制装置
US5937645A (en) * 1996-01-08 1999-08-17 Nachi-Fujikoshi Corp. Hydraulic device
JP3609182B2 (ja) * 1996-01-08 2005-01-12 日立建機株式会社 建設機械の油圧駆動装置
US5680760A (en) * 1996-03-28 1997-10-28 Caterpillar Inc. Hydraulic drive system
KR0174397B1 (ko) * 1996-05-30 1999-04-15 토니헬샴 로우더의 엔진/펌프 제어장치
US5743089A (en) * 1996-07-25 1998-04-28 Kabushiki Kaisha Kobe Seiko Sho Hydraulic control system
EP0877168B1 (de) * 1996-11-21 2004-02-11 Hitachi Construction Machinery Co., Ltd. Hydraulisches antriebssystem
US5880957A (en) * 1996-12-03 1999-03-09 Caterpillar Inc. Method for programming hydraulic implement control system
KR100240086B1 (ko) * 1997-03-22 2000-01-15 토니헬 유압식 주행장치의 자동 승압장치 및 방법
US6209321B1 (en) * 1997-08-29 2001-04-03 Komatsu Ltd. Hydraulic controller for a working machine
US6173572B1 (en) * 1999-09-23 2001-01-16 Caterpillar Inc. Method and apparatus for controlling a bypass valve of a fluid circuit
US7155909B2 (en) 2003-05-15 2007-01-02 Kobelco Construction Machinery Co., Ltd. Hydraulic controller for working machine
KR100578976B1 (ko) 2004-10-15 2006-05-12 삼성에스디아이 주식회사 접착력이 우수한 다층 박막 및 이의 제조방법
JP2007205464A (ja) * 2006-02-01 2007-08-16 Bosch Rexroth Corp 可変容量ポンプの制御方法
US7857070B2 (en) * 2006-04-18 2010-12-28 Deere & Company Control system using a single proportional valve
RU2453658C2 (ru) * 2007-11-21 2012-06-20 Вольво Констракшн Эквипмент Аб Чувствительная к нагрузке система, содержащая её рабочая машина и способ управления гидроприводом
EP2215310B1 (de) 2007-11-21 2017-09-27 Volvo Construction Equipment AB Lasterfassungssystem, arbeitsmaschine mit dem system und verfahren zur steuerung einer hydraulischen funktion
JP2010276162A (ja) * 2009-05-29 2010-12-09 Komatsu Ltd 作業機械
US8607559B2 (en) * 2009-12-29 2013-12-17 Eaton Corporation Fluid bypass system
US8844280B2 (en) 2011-02-28 2014-09-30 Caterpillar Inc. Hydraulic control system having cylinder flow correction
WO2012121427A1 (ko) * 2011-03-07 2012-09-13 볼보 컨스트럭션 이큅먼트 에이비 파이프 레이어용 유압회로
JP5631830B2 (ja) * 2011-09-21 2014-11-26 住友重機械工業株式会社 油圧制御装置及び油圧制御方法
WO2013080825A1 (ja) * 2011-11-29 2013-06-06 日立建機株式会社 建設機械
US9272787B2 (en) * 2012-11-05 2016-03-01 Hamilton Sundstrand Corporation Flow reduction for bleed air systems
CN103398034B (zh) * 2013-08-15 2015-08-26 中机美诺科技股份有限公司 一种用于马铃薯播种机的液压控制***
CN104709834B (zh) * 2013-12-11 2017-08-04 北汽福田汽车股份有限公司 回转调速控制***和起重机
JP6189762B2 (ja) * 2014-01-31 2017-08-30 株式会社Kcm 油圧制御装置
CN103982476B (zh) * 2014-05-27 2016-02-10 湖南联智桥隧技术有限公司 一种液压控制回路
AU2016424594A1 (en) * 2016-09-27 2019-03-28 Boatland Investments Pty Ltd Apparatus and method for actuating a hydraulic cylinder
CN110392789B (zh) * 2017-03-10 2022-01-14 住友建机株式会社 挖土机
JP6912947B2 (ja) * 2017-06-14 2021-08-04 川崎重工業株式会社 油圧システム
JP6853740B2 (ja) * 2017-06-16 2021-03-31 川崎重工業株式会社 油圧システム
JP7169046B2 (ja) * 2019-02-18 2022-11-10 キャタピラー エス エー アール エル 作業機械の油圧制御回路
EP3546955B1 (de) * 2019-05-24 2021-12-08 Sensirion AG Leitungssensor mit leitungssonde zur entnahme einer flüssigkeit aus einer leitung und verfahren zum betrieb
CN115992841B (zh) * 2022-12-08 2023-07-04 重庆大学 一种流量自补偿负载敏感泵阀协调电液***及控制方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426194A (en) * 1981-03-06 1984-01-17 Sundstrand Corporation Viscosity compensating circuits
JPS57154501A (en) * 1981-03-19 1982-09-24 Daikin Ind Ltd Mode-changeable flow control circuit
AU552866B2 (en) * 1981-05-18 1986-06-26 Deere & Company Power-on-demand hydraulic system
DE3321483A1 (de) * 1983-06-14 1984-12-20 Linde Ag, 6200 Wiesbaden Hydraulische einrichtung mit einer pumpe und mindestens zwei von dieser beaufschlagten verbrauchern hydraulischer energie
US4694647A (en) * 1986-03-28 1987-09-22 Kabushiki Kaisha Komatsu Seisakusho Hydraulic circuit system for use in hydraulically operated vehicles
DE3716200C2 (de) * 1987-05-14 1997-08-28 Linde Ag Steuer- und Regeleinrichtung für ein hydrostatisches Antriebsaggregat und Verfahren zum Betreiben eines solchen
JP2612452B2 (ja) * 1987-07-20 1997-05-21 株式会社神戸製鋼所 高延性高強度冷延鋼板の製造方法
JPH01110883A (ja) * 1987-10-23 1989-04-27 Kawasaki Heavy Ind Ltd 可変容量形ポンプの吐出圧力制御装置
JP2622401B2 (ja) * 1988-06-10 1997-06-18 東芝機械株式会社 油圧流量制御装置
WO1990010795A1 (en) * 1989-03-13 1990-09-20 Hitachi Construction Machinery Co., Ltd. Hydraulic driving unit for working machine
JPH07103883B2 (ja) * 1989-04-17 1995-11-08 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
JPH0374607A (ja) * 1989-08-16 1991-03-29 Komatsu Ltd 油圧回路
JPH0758081B2 (ja) * 1989-10-09 1995-06-21 日立建機株式会社 油圧駆動システム
US4977928A (en) * 1990-05-07 1990-12-18 Caterpillar Inc. Load sensing hydraulic system

Also Published As

Publication number Publication date
US5394697A (en) 1995-03-07
DE69306738T2 (de) 1997-04-03
EP0597109A1 (de) 1994-05-18
WO1993018308A1 (en) 1993-09-16
JP3204977B2 (ja) 2001-09-04
EP0597109B1 (de) 1996-12-18
KR970000243B1 (ko) 1997-01-08
EP0597109A4 (en) 1994-08-24

Similar Documents

Publication Publication Date Title
DE69306738D1 (de) Hydraulisches antriebsystem
DE69311239D1 (de) Hydraulisches antriebsystem
ITMI922446A1 (it) Sistema di azionamento idraulico
DE69510278D1 (de) Hydraulisches allradantriebssystem
DE59403208D1 (de) Hydrauliksteuersystem
DE68904998D1 (de) Hydraulisches antriebssystem.
DK0515608T3 (da) Hydrauliksystem
DE59402917D1 (de) Hydraulikaggregat
DE69120818D1 (de) Hydraulisches system
EP0445703A3 (en) Hydraulic drive system
DE59303219D1 (de) Hydrostatischer Fahrantrieb
FI941710A0 (fi) Hydraulinen moottori
DK165991A (da) Hydraulisk styresystem til koeretoejer
DE69326305D1 (de) Hydraulisches steuerungssystem
DE69410330D1 (de) Hydraulikanlage
DE69610808D1 (de) Hydraulischer Antrieb
FI932210A0 (fi) Hydraulisk drivanordning foer en fartygslastlucka
DE69727552D1 (de) Hydraulisches antriebssystem
DK0515639T3 (da) Hydrauliksystem
FI970595A (fi) Hydraulikäytön ohjausjärjestelmä
DE59301464D1 (de) Antriebsaggregat
KR960702801A (ko) 유압 제어 시스템
DE69113377D1 (de) Hydraulisches Antriebssystem.
IT1272019B (it) Dispositivo di comando idraulico
ATE153417T1 (de) Hydraulischer motor

Legal Events

Date Code Title Description
8364 No opposition during term of opposition