WO2012162235A3 - Pump system having open-loop torque control - Google Patents

Pump system having open-loop torque control Download PDF

Info

Publication number
WO2012162235A3
WO2012162235A3 PCT/US2012/038826 US2012038826W WO2012162235A3 WO 2012162235 A3 WO2012162235 A3 WO 2012162235A3 US 2012038826 W US2012038826 W US 2012038826W WO 2012162235 A3 WO2012162235 A3 WO 2012162235A3
Authority
WO
WIPO (PCT)
Prior art keywords
pump system
pump
actuator
open
torque control
Prior art date
Application number
PCT/US2012/038826
Other languages
French (fr)
Other versions
WO2012162235A2 (en
Inventor
Bryan E. Nelson
Lawrence J. Tognetti
Jeffrey L. Kuehn
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 WO2012162235A2 publication Critical patent/WO2012162235A2/en
Publication of WO2012162235A3 publication Critical patent/WO2012162235A3/en

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
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers

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)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

A pump system (24) is disclosed. The pump system may have a pump (28) with a displacement that is variable, and an actuator (34) movable to adjust the displacement of the pump. The pump system may also have an electro- hydraulic valve (36) fluidly connected to the actuator and configured to control movement of the actuator, and a variable resistor (67) mechanically connected to at least one of the actuator and the pump. The variable resistor may be adjustable by movement of the at least one of the actuator and the pump to vary a current passing through the electro-hydraulic valve.
PCT/US2012/038826 2011-05-24 2012-05-21 Pump system having open-loop torque control WO2012162235A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/114,670 2011-05-24
US13/114,670 US20120301325A1 (en) 2011-05-24 2011-05-24 Pump system having open-loop torque control

Publications (2)

Publication Number Publication Date
WO2012162235A2 WO2012162235A2 (en) 2012-11-29
WO2012162235A3 true WO2012162235A3 (en) 2013-03-14

Family

ID=47218004

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/038826 WO2012162235A2 (en) 2011-05-24 2012-05-21 Pump system having open-loop torque control

Country Status (2)

Country Link
US (1) US20120301325A1 (en)
WO (1) WO2012162235A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103774707B (en) * 2014-01-23 2016-07-27 长安大学 A kind of hydraulic system of land leveler operating device
CN103953090A (en) * 2014-05-12 2014-07-30 德州德工机械有限公司 Grafting load sensing energy-saving hydraulic system of loader
US9869311B2 (en) 2015-05-19 2018-01-16 Caterpillar Inc. System for estimating a displacement of a pump
CN108331064B (en) * 2018-02-05 2020-09-08 徐州徐工挖掘机械有限公司 Load self-adaptive intelligent control device and control system of hydraulic excavator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510269A (en) * 1991-06-28 1993-01-19 Komatsu Ltd Method for controlling absorption torque of variable displacement type hydraulic pump
US6010309A (en) * 1997-01-31 2000-01-04 Komatsu Ltd. Control device for variable capacity pump
US6672055B1 (en) * 1999-11-18 2004-01-06 Shin Caterpillar Mitsubishi Ltd. Hydraulic pump control device
US20100154403A1 (en) * 2008-12-18 2010-06-24 Caterpillar Inc. System and method for operating a variable displacement hydraulic pump

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2531492C2 (en) * 1975-07-15 1982-09-16 Robert Bosch Gmbh, 7000 Stuttgart Adjustable hydrostatic pump
US4801247A (en) * 1985-09-02 1989-01-31 Yuken Kogyo Kabushiki Kaisha Variable displacement piston pump
US5017094A (en) * 1990-03-12 1991-05-21 Eaton Corporation Solenoid valve control system for hydrostatic transmission
JP3064574B2 (en) * 1991-09-27 2000-07-12 株式会社小松製作所 Working oil amount switching control device for hydraulic excavator
US5588805A (en) * 1995-08-28 1996-12-31 Sauer Inc. Vibration and pressure attenuator for hydraulic units
US6179570B1 (en) * 1999-06-08 2001-01-30 Caterpillar Inc. Variable pump control for hydraulic fan drive
US7536856B2 (en) * 2005-11-30 2009-05-26 Caterpillar Inc. System for controlling a power output

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510269A (en) * 1991-06-28 1993-01-19 Komatsu Ltd Method for controlling absorption torque of variable displacement type hydraulic pump
US6010309A (en) * 1997-01-31 2000-01-04 Komatsu Ltd. Control device for variable capacity pump
US6672055B1 (en) * 1999-11-18 2004-01-06 Shin Caterpillar Mitsubishi Ltd. Hydraulic pump control device
US20100154403A1 (en) * 2008-12-18 2010-06-24 Caterpillar Inc. System and method for operating a variable displacement hydraulic pump

Also Published As

Publication number Publication date
WO2012162235A2 (en) 2012-11-29
US20120301325A1 (en) 2012-11-29

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