EP0582099A3 - Hydraulic system with load sensing - Google Patents

Hydraulic system with load sensing Download PDF

Info

Publication number
EP0582099A3
EP0582099A3 EP9393110985A EP93110985A EP0582099A3 EP 0582099 A3 EP0582099 A3 EP 0582099A3 EP 9393110985 A EP9393110985 A EP 9393110985A EP 93110985 A EP93110985 A EP 93110985A EP 0582099 A3 EP0582099 A3 EP 0582099A3
Authority
EP
European Patent Office
Prior art keywords
load sensing
hydraulic
control valve
pump
sensing port
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.)
Granted
Application number
EP9393110985A
Other languages
German (de)
Other versions
EP0582099A2 (en
EP0582099B1 (en
Inventor
Douglas Michael Durant
Larry Marvin Delfs
Derek Malcolm Eagles
Ronald Lee Pratt
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP0582099A2 publication Critical patent/EP0582099A2/en
Publication of EP0582099A3 publication Critical patent/EP0582099A3/en
Application granted granted Critical
Publication of EP0582099B1 publication Critical patent/EP0582099B1/en
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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Vehicle Body Suspensions (AREA)
  • Lift Valve (AREA)
  • Actuator (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

A hydraulic system includes a hydraulic pump which provides pressurized fluid at an output port as a function of pressure in a load sensing port, a hydraulic reservoir, and a load pressure sensing line connected to the load sensing port. A solenoid operated implement control valve controls fluid communication to and from a hydraulic function such as a cylinder. A supply control valve has a first position wherein the reservoir is communicated with the load sensing port and a second position wherein the pump output port is communicated with the load sensing port. A spring urges the valve member to its first position, and a solenoid is energizable to move the valve member to its second position. The solenoid is energized when the implement control valve is activated so that the supply control valve communicates pump pressure to the load sensing port and the pump will operate at full capacity whenever the second hydraulic function is operated.
EP93110985A 1992-08-03 1993-07-09 Hydraulic system with load sensing Expired - Lifetime EP0582099B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US923762 1992-08-03
US07/923,762 US5245827A (en) 1992-08-03 1992-08-03 Supply valve arrangement for closed center hydraulic system

Publications (3)

Publication Number Publication Date
EP0582099A2 EP0582099A2 (en) 1994-02-09
EP0582099A3 true EP0582099A3 (en) 1994-08-24
EP0582099B1 EP0582099B1 (en) 1997-01-02

Family

ID=25449226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93110985A Expired - Lifetime EP0582099B1 (en) 1992-08-03 1993-07-09 Hydraulic system with load sensing

Country Status (10)

Country Link
US (1) US5245827A (en)
EP (1) EP0582099B1 (en)
JP (1) JPH06159305A (en)
AT (1) ATE147139T1 (en)
AU (1) AU659751B2 (en)
BR (1) BR9303240A (en)
CA (1) CA2101235C (en)
DE (1) DE59304948D1 (en)
ES (1) ES2095527T3 (en)
MX (1) MX9304408A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4311191C2 (en) * 1993-04-05 1995-02-02 Deere & Co Hydraulic system for supplying open or closed hydraulic functions
DE10040395A1 (en) 1999-09-14 2001-03-22 Caterpillar Inc Hydraulic control system for improving pump response and dynamic match of pump and valve has control unit for controlling rate of change of cross-section of main flow control valve
US20060196179A1 (en) * 2005-03-01 2006-09-07 Arun Kesavan Load-sensing integrated brake and fan hydraulic system
US8267004B2 (en) * 2009-05-20 2012-09-18 Lifetime Enterprises, Llc Adaptable hydraulic control system
CN102734276B (en) * 2012-06-28 2015-07-01 三一汽车起重机械有限公司 Load sensing electric proportion hydraulic control system and engineering machinery
CN103148038A (en) * 2013-03-20 2013-06-12 镇江华瑞液压机械有限公司 Dual-energy saving combined hydraulic valve
CN103727082B (en) * 2013-12-27 2016-08-31 三一汽车起重机械有限公司 Hydraulic system and engineering machinery
CN105158076A (en) * 2015-08-19 2015-12-16 河南科技大学 Impact type pneumatic bearing device
DE102018212077A1 (en) * 2018-07-19 2020-01-23 Deere & Company Method for operating a hydraulic consumer on an electrically actuated control valve
CN111577689B (en) * 2020-06-03 2021-03-26 江苏科迈液压控制系统有限公司 Flow saturation resisting method for load sensitive proportional multi-way valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010860A1 (en) * 1978-09-28 1980-05-14 Eaton Corporation Load sensing control for hydraulic system
EP0115590A2 (en) * 1982-12-30 1984-08-15 Robert Bosch Gmbh Hydraulic control device
EP0477370A1 (en) * 1990-01-11 1992-04-01 Hitachi Construction Machinery Co., Ltd. Valve device and hydraulic driving device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486334A (en) * 1968-05-16 1969-12-30 Cessna Aircraft Co Hydraulic power transmission control
US4276811A (en) * 1972-11-08 1981-07-07 Control Concepts, Inc. Closed center programmed valve system with load sense
US4401009A (en) * 1972-11-08 1983-08-30 Control Concepts, Inc. Closed center programmed valve system with load sense
US4050596A (en) * 1975-07-24 1977-09-27 Control Concepts, Inc. Electrohydraulic valve assembly for front end loader attachment to farm tractor
US4046399A (en) * 1975-11-05 1977-09-06 Control Concepts, Inc. Electrohydraulic system for towed vehicle
US4023646A (en) * 1975-11-24 1977-05-17 Allis-Chalmers Corporation Load sensitive hydraulic system
US4107924A (en) * 1977-04-28 1978-08-22 Caterpillar Tractor Co. Pump upgrading system
US4589437A (en) * 1983-07-07 1986-05-20 Zeuner Kenneth W Reel speed valve assembly
DE3914904C2 (en) * 1989-05-05 1995-06-29 Rexroth Mannesmann Gmbh Regulation for a variable displacement pump that works depending on the load

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010860A1 (en) * 1978-09-28 1980-05-14 Eaton Corporation Load sensing control for hydraulic system
EP0115590A2 (en) * 1982-12-30 1984-08-15 Robert Bosch Gmbh Hydraulic control device
EP0477370A1 (en) * 1990-01-11 1992-04-01 Hitachi Construction Machinery Co., Ltd. Valve device and hydraulic driving device

Also Published As

Publication number Publication date
CA2101235C (en) 1995-06-27
BR9303240A (en) 1994-03-15
CA2101235A1 (en) 1994-02-04
EP0582099A2 (en) 1994-02-09
DE59304948D1 (en) 1997-02-13
AU659751B2 (en) 1995-05-25
EP0582099B1 (en) 1997-01-02
US5245827A (en) 1993-09-21
ES2095527T3 (en) 1997-02-16
ATE147139T1 (en) 1997-01-15
AU4431093A (en) 1994-02-10
MX9304408A (en) 1994-03-31
JPH06159305A (en) 1994-06-07

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