ITTO990334A0 - Controllo variabile della pressione di margine - Google Patents

Controllo variabile della pressione di margine

Info

Publication number
ITTO990334A0
ITTO990334A0 IT99TO000334A ITTO990334A ITTO990334A0 IT TO990334 A0 ITTO990334 A0 IT TO990334A0 IT 99TO000334 A IT99TO000334 A IT 99TO000334A IT TO990334 A ITTO990334 A IT TO990334A IT TO990334 A0 ITTO990334 A0 IT TO990334A0
Authority
IT
Italy
Prior art keywords
pressure control
margin pressure
variable margin
variable
control
Prior art date
Application number
IT99TO000334A
Other languages
English (en)
Inventor
Dale B Childress
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 ITTO990334A0 publication Critical patent/ITTO990334A0/it
Publication of ITTO990334A1 publication Critical patent/ITTO990334A1/it
Application granted granted Critical
Publication of IT1308454B1 publication Critical patent/IT1308454B1/it

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
    • 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
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/06—Pressure in a (hydraulic) circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Control Of Transmission Device (AREA)
  • Magnetically Actuated Valves (AREA)
IT1999TO000334A 1998-04-30 1999-04-26 Controllo variabile della pressione di margine IT1308454B1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/070,296 US6030183A (en) 1998-04-30 1998-04-30 Variable margin pressure control

Publications (3)

Publication Number Publication Date
ITTO990334A0 true ITTO990334A0 (it) 1999-04-26
ITTO990334A1 ITTO990334A1 (it) 2000-10-26
IT1308454B1 IT1308454B1 (it) 2001-12-17

Family

ID=22094434

Family Applications (1)

Application Number Title Priority Date Filing Date
IT1999TO000334A IT1308454B1 (it) 1998-04-30 1999-04-26 Controllo variabile della pressione di margine

Country Status (4)

Country Link
US (1) US6030183A (it)
JP (1) JP4510174B2 (it)
DE (1) DE19919160B4 (it)
IT (1) IT1308454B1 (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7905089B2 (en) * 2007-09-13 2011-03-15 Caterpillar Inc. Actuator control system implementing adaptive flow control
EP2767713A1 (en) * 2013-02-19 2014-08-20 Innas B.V. Hydraulic swash block positioning system
CN106593837B (zh) * 2017-02-10 2018-11-02 江苏恒立液压科技有限公司 液压柱塞泵变量控制结构及其控制方法
CN116592009B (zh) * 2023-04-19 2026-02-10 三一汽车起重机械有限公司 一种变量机构及液压系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987622A (en) * 1976-02-02 1976-10-26 Caterpillar Tractor Co. Load controlled fluid system having parallel work elements
US4147034A (en) * 1978-04-19 1979-04-03 Caterpillar Tractor Co. Hydraulic system with priority control
US4196588A (en) * 1978-05-01 1980-04-08 Caterpillar Tractor Co. Margin valve
KR950007624B1 (ko) * 1990-09-28 1995-07-13 히다찌 겐끼 가부시기가이샤 유압펌프의 제어장치
JP3562657B2 (ja) * 1994-09-14 2004-09-08 株式会社小松製作所 可変容量油圧ポンプの容量制御装置
US5562424A (en) * 1995-09-12 1996-10-08 Caterpillar Inc. Pump displacement control for a variable displacement pump
US5567123A (en) * 1995-09-12 1996-10-22 Caterpillar Inc. Pump displacement control for a variable displacement pump
JP3647625B2 (ja) * 1996-11-21 2005-05-18 日立建機株式会社 油圧駆動装置

Also Published As

Publication number Publication date
DE19919160B4 (de) 2015-05-13
JP4510174B2 (ja) 2010-07-21
IT1308454B1 (it) 2001-12-17
DE19919160A1 (de) 1999-11-25
US6030183A (en) 2000-02-29
JPH11336704A (ja) 1999-12-07
ITTO990334A1 (it) 2000-10-26

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ITTO990334A0 (it) Controllo variabile della pressione di margine