GB2291986B - Fluid pressure control system for hydraulic excavators - Google Patents

Fluid pressure control system for hydraulic excavators

Info

Publication number
GB2291986B
GB2291986B GB9515381A GB9515381A GB2291986B GB 2291986 B GB2291986 B GB 2291986B GB 9515381 A GB9515381 A GB 9515381A GB 9515381 A GB9515381 A GB 9515381A GB 2291986 B GB2291986 B GB 2291986B
Authority
GB
United Kingdom
Prior art keywords
control system
fluid pressure
pressure control
hydraulic excavators
excavators
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 - Fee Related
Application number
GB9515381A
Other versions
GB2291986A (en
GB9515381D0 (en
Inventor
Hee Woo Park
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.)
Hyundai Doosan Infracore Co Ltd
Original Assignee
Daewoo Heavy Industries 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 Daewoo Heavy Industries Ltd filed Critical Daewoo Heavy Industries Ltd
Publication of GB9515381D0 publication Critical patent/GB9515381D0/en
Publication of GB2291986A publication Critical patent/GB2291986A/en
Application granted granted Critical
Publication of GB2291986B publication Critical patent/GB2291986B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • 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
    • E02F9/2292—Systems with two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/02—External pressure

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)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Operation Control Of Excavators (AREA)
GB9515381A 1994-07-29 1995-07-27 Fluid pressure control system for hydraulic excavators Expired - Fee Related GB2291986B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940018778A KR0120281B1 (en) 1994-07-29 1994-07-29 Apparatus for controlling input horse power and discharge of a pump in load sensing system of an excavator

Publications (3)

Publication Number Publication Date
GB9515381D0 GB9515381D0 (en) 1995-09-27
GB2291986A GB2291986A (en) 1996-02-07
GB2291986B true GB2291986B (en) 1997-09-10

Family

ID=19389440

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9515381A Expired - Fee Related GB2291986B (en) 1994-07-29 1995-07-27 Fluid pressure control system for hydraulic excavators

Country Status (3)

Country Link
JP (1) JPH0849264A (en)
KR (1) KR0120281B1 (en)
GB (1) GB2291986B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4447154C2 (en) * 1994-12-29 2002-05-29 Brueninghaus Hydromatik Gmbh Load-sensing circuit
GB2311385B (en) * 1996-03-23 2000-07-19 Trinova Ltd A fluid power control circuit
JP4067596B2 (en) * 1997-03-07 2008-03-26 日立建機株式会社 Hydraulic control equipment for construction machinery
US6623247B2 (en) * 2001-05-16 2003-09-23 Caterpillar Inc Method and apparatus for controlling a variable displacement hydraulic pump
US6848254B2 (en) 2003-06-30 2005-02-01 Caterpillar Inc. Method and apparatus for controlling a hydraulic motor
EP2378134B1 (en) 2008-12-15 2016-04-13 Doosan Infracore Co., Ltd. Fluid flow control apparatus for hydraulic pump of construction machine
JP2012092670A (en) * 2010-10-25 2012-05-17 Kanzaki Kokyukoki Manufacturing Co Ltd Pump unit
JP5945742B2 (en) * 2012-03-08 2016-07-05 株式会社 神崎高級工機製作所 Pump unit swash plate angle control system
CN108533545B (en) * 2018-06-29 2020-03-10 潍柴动力股份有限公司 Mechanical proportional controller of hydraulic variable pump and hydraulic variable pump
CN109882462B (en) * 2019-01-11 2020-08-28 徐州工业职业技术学院 Hydraulic control proportion and load sensitivity fusion variable pump and hydraulic control intelligent flow distribution system
KR102559604B1 (en) * 2021-04-26 2023-07-26 주식회사 모트롤 Hydraulic system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1506619A (en) * 1974-09-05 1978-04-05 Parker Hannifin Corp Variable displacement pump control assembly
US4627238A (en) * 1983-11-08 1986-12-09 Hydromatik Gmbh Output control apparatus for a hydrostatic drive with delivery adjustment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1506619A (en) * 1974-09-05 1978-04-05 Parker Hannifin Corp Variable displacement pump control assembly
US4627238A (en) * 1983-11-08 1986-12-09 Hydromatik Gmbh Output control apparatus for a hydrostatic drive with delivery adjustment

Also Published As

Publication number Publication date
KR0120281B1 (en) 1997-10-22
GB2291986A (en) 1996-02-07
JPH0849264A (en) 1996-02-20
GB9515381D0 (en) 1995-09-27

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20140727