JPH01220706A - 油圧式掘削機の油圧制御装置 - Google Patents

油圧式掘削機の油圧制御装置

Info

Publication number
JPH01220706A
JPH01220706A JP63042904A JP4290488A JPH01220706A JP H01220706 A JPH01220706 A JP H01220706A JP 63042904 A JP63042904 A JP 63042904A JP 4290488 A JP4290488 A JP 4290488A JP H01220706 A JPH01220706 A JP H01220706A
Authority
JP
Japan
Prior art keywords
hydraulic
pressure
valve
pilot
relief
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.)
Pending
Application number
JP63042904A
Other languages
English (en)
Japanese (ja)
Inventor
Nobuhisa Kamikawa
神川　信久
Kimio Nishida
西田　喜三夫
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP63042904A priority Critical patent/JPH01220706A/ja
Priority to KR1019890701117A priority patent/KR0141982B1/ko
Priority to PCT/JP1989/000140 priority patent/WO1989008190A1/ja
Priority to US07/425,207 priority patent/US5077974A/en
Priority to EP89902300A priority patent/EP0372081B1/en
Priority to DE68923934T priority patent/DE68923934T2/de
Publication of JPH01220706A publication Critical patent/JPH01220706A/ja
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • 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
    • 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
    • F04B49/002—Hydraulic systems to change the pump delivery

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
JP63042904A 1988-02-25 1988-02-25 油圧式掘削機の油圧制御装置 Pending JPH01220706A (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP63042904A JPH01220706A (ja) 1988-02-25 1988-02-25 油圧式掘削機の油圧制御装置
KR1019890701117A KR0141982B1 (ko) 1988-02-25 1989-02-13 유압식 굴삭기의 유압제어장치
PCT/JP1989/000140 WO1989008190A1 (fr) 1988-02-25 1989-02-13 Unite de commande hydraulique pour excavateurs hydrauliques
US07/425,207 US5077974A (en) 1988-02-25 1989-02-13 Constant power displacement control cutoff system with adjustable relief valve
EP89902300A EP0372081B1 (en) 1988-02-25 1989-02-13 Hydraulic control unit of hydraulic excavators
DE68923934T DE68923934T2 (de) 1988-02-25 1989-02-13 Hydraulische steuereinheit für hydraulikbagger.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63042904A JPH01220706A (ja) 1988-02-25 1988-02-25 油圧式掘削機の油圧制御装置

Publications (1)

Publication Number Publication Date
JPH01220706A true JPH01220706A (ja) 1989-09-04

Family

ID=12649020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63042904A Pending JPH01220706A (ja) 1988-02-25 1988-02-25 油圧式掘削機の油圧制御装置

Country Status (6)

Country Link
US (1) US5077974A (enExample)
EP (1) EP0372081B1 (enExample)
JP (1) JPH01220706A (enExample)
KR (1) KR0141982B1 (enExample)
DE (1) DE68923934T2 (enExample)
WO (1) WO1989008190A1 (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04121503U (ja) * 1991-04-16 1992-10-30 住友建機株式会社 油圧式建設車両の自動昇圧回路
US6820356B2 (en) * 2002-06-05 2004-11-23 Komatsu Ltd. Hybrid powered construction equipment
KR100588285B1 (ko) * 1999-01-22 2006-06-09 가부시키가이샤 고마쓰 세이사쿠쇼 건설기계의 유압회로

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07103593B2 (ja) * 1990-06-06 1995-11-08 株式会社小松製作所 積み込み作業車両の制御装置及び方法
US5456077A (en) * 1994-04-22 1995-10-10 Mcneilus Truck And Manufacturing, Inc. Remote unloader hydraulic valve system
US5540049A (en) * 1995-08-01 1996-07-30 Caterpillar Inc. Control system and method for a hydraulic actuator with velocity and force modulation control
US6408676B1 (en) 1999-03-31 2002-06-25 Caterpillar Inc. Method and apparatus for determining the status of a relief valve
KR100797315B1 (ko) * 2001-07-16 2008-01-23 두산인프라코어 주식회사 굴삭기의 주행 및 프론트작업의 복합작업용 유압제어장치
KR100594851B1 (ko) * 2002-04-30 2006-07-03 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 유압식 브레이크장치
KR100988429B1 (ko) * 2003-12-26 2010-10-18 두산인프라코어 주식회사 굴삭기의 주행복합작업용 유압제어장치
KR100988443B1 (ko) * 2003-12-26 2010-10-18 두산인프라코어 주식회사 굴삭기의 주행 및 프론트작업의 복합동작용 유압제어장치
EP1676963A3 (en) * 2004-12-30 2008-12-31 Doosan Infracore Co., Ltd. Fluid pump control system for excavators
US9086143B2 (en) 2010-11-23 2015-07-21 Caterpillar Inc. Hydraulic fan circuit having energy recovery
CN102140807B (zh) * 2011-01-11 2012-05-23 徐州徐工挖掘机械有限公司 一种提高挖掘机挖掘操纵特性和平整作业特性的方法
CN103352886B (zh) * 2013-06-28 2015-12-23 山河智能装备股份有限公司 能量回收利用液压控制阀

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4729838U (enExample) * 1971-04-26 1972-12-05
JPS54126146U (enExample) * 1978-02-22 1979-09-03

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757640A (fr) * 1969-10-16 1971-04-16 Borg Warner Systemes hydrauliques, notamment pour la regulation d'une pompea debit variable
DE3024399A1 (de) * 1980-06-28 1982-01-21 Linde Ag, 6200 Wiesbaden Regeleinrichtung fuer ein aggregat aus mehreren, von einer gemeinsamen primaerenergiequelle angetriebenen pumpe
US4571941A (en) * 1980-12-27 1986-02-25 Hitachi Construction Machinery Co, Ltd. Hydraulic power system
JPS57184749A (en) * 1981-05-01 1982-11-13 Hitachi Constr Mach Co Ltd Control device for hydraulic system
JPS5876853U (ja) * 1981-11-19 1983-05-24 株式会社小松製作所 油圧駆動装置
US4481770A (en) * 1982-03-22 1984-11-13 Caterpillar Tractor Co. Fluid system with flow compensated torque control
JPH0633772B2 (ja) * 1983-12-29 1994-05-02 カヤバ工業株式会社 可変容量ポンプの制御装置
JPS60250132A (ja) * 1984-05-25 1985-12-10 Kayaba Ind Co Ltd 建設車両の油圧制御回路
JPS6193552A (ja) * 1984-10-15 1986-05-12 Matsushita Electric Works Ltd 充電式電気機器
JPS6193552U (enExample) * 1984-11-27 1986-06-17
JPS6256801A (ja) * 1985-09-06 1987-03-12 Toshiba Corp 曲り導体のピツチ間距離測定器
JPS6256801U (enExample) * 1985-09-30 1987-04-08
JPS62167880A (ja) * 1986-01-20 1987-07-24 Nippon Kokan Kk <Nkk> 管内外面のコ−テイング装置
JPH0740702Y2 (ja) * 1986-04-11 1995-09-20 株式会社小松製作所 移動式建設機械の油圧駆動装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4729838U (enExample) * 1971-04-26 1972-12-05
JPS54126146U (enExample) * 1978-02-22 1979-09-03

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04121503U (ja) * 1991-04-16 1992-10-30 住友建機株式会社 油圧式建設車両の自動昇圧回路
KR100588285B1 (ko) * 1999-01-22 2006-06-09 가부시키가이샤 고마쓰 세이사쿠쇼 건설기계의 유압회로
US6820356B2 (en) * 2002-06-05 2004-11-23 Komatsu Ltd. Hybrid powered construction equipment

Also Published As

Publication number Publication date
KR0141982B1 (ko) 1999-02-18
EP0372081B1 (en) 1995-08-23
DE68923934D1 (de) 1995-09-28
EP0372081A1 (en) 1990-06-13
KR900700699A (ko) 1990-08-16
EP0372081A4 (enExample) 1994-03-16
WO1989008190A1 (fr) 1989-09-08
DE68923934T2 (de) 1996-04-11
US5077974A (en) 1992-01-07

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