EP2199623A3 - Hydraulic system - Google Patents

Hydraulic system Download PDF

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Publication number
EP2199623A3
EP2199623A3 EP09177885A EP09177885A EP2199623A3 EP 2199623 A3 EP2199623 A3 EP 2199623A3 EP 09177885 A EP09177885 A EP 09177885A EP 09177885 A EP09177885 A EP 09177885A EP 2199623 A3 EP2199623 A3 EP 2199623A3
Authority
EP
European Patent Office
Prior art keywords
displacement pump
variable displacement
control unit
delivery volume
adjusting
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.)
Withdrawn
Application number
EP09177885A
Other languages
German (de)
French (fr)
Other versions
EP2199623A2 (en
Inventor
Wolfgang Bauer
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 EP2199623A2 publication Critical patent/EP2199623A2/en
Publication of EP2199623A3 publication Critical patent/EP2199623A3/en
Withdrawn legal-status Critical Current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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0423—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling pump output or bypass, other than to maintain constant speed
    • 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
    • E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • 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
    • 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
    • F04B49/06—Control using electricity
    • 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
    • F04B49/10—Other safety measures
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/255—Flow control functions
    • 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
    • F15B2211/615—Filtering 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/633—Electronic controllers using input signals representing a state of the prime mover, e.g. torque or rotational speed
    • 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
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6343—Electronic controllers using input signals representing a temperature
    • 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
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
    • 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6652—Control of the pressure source, e.g. control of the swash plate angle
    • 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6654—Flow rate control

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

Es wird ein Hydrauliksystem (10) mit einem Antriebsmotor (25), einer durch den Antriebsmotor (25) antreibbaren hydraulischen Verstellpumpe (18), einem durch die Verstellpumpe (18) antreibbaren hydraulischen Verbraucher (12) und einer elektronischen Steuereinheit (32) vorgeschlagen, wobei die Verstellpumpe (18) mit einer Fördervolumenverstelleinheit (24) ausgestattet ist, an welcher über einen mit einem Verstellkolben (23) in Eingriff bringbaren Anschlag (23') ein maximales Fördervolumen der Verstellpumpe (18) einstellbar ist. Um die Leistungsabgabe der Verstellpumpe an die Betriebsbedingungen eines Fahrzeugs (44) anzupassen, wird vorgeschlagen, dass der Anschlag (23') der Fördervolumenverstelleinheit (24) durch die Steuereinheit (32) ansteuerbare Stellmittel (38) umfasst, durch welche das maximale Fördervolumen der Verstellpumpe (18) über die elektronische Steuereinheit (32) veränderbar ist, wobei die elektronische Steuereinheit (32) ein antriebsdrehzahlabhängiges Signal erfasst, in Abhängigkeit dessen durch die Steuereinheit (32) ein Steuersignal für das ansteuerbare Stellmittel (38) generierbar ist, welches das maximale Fördervolumen der Verstellpumpe (18) an der Fördervolumenverstelleinheit (24) durch Verstellen des Anschlags (23') verändert.

Figure imgaf001
A hydraulic system (10) with a drive motor (25), a hydraulic variable displacement pump (18) drivable by the drive motor (25), a hydraulic consumer (12) drivable by the variable displacement pump (18) and an electronic control unit (32) are proposed. wherein the variable displacement pump (18) is equipped with a delivery volume adjusting unit (24) on which a maximum delivery volume of the variable displacement pump (18) can be adjusted via a stop (23 ') which can be brought into engagement with an adjusting piston (23). In order to adapt the power output of the variable displacement pump to the operating conditions of a vehicle (44), it is proposed that the stop (23 ') of the delivery volume adjusting unit (24) comprises controllable adjusting means (38) by the control unit (32), through which the maximum delivery volume of the variable displacement pump (18) via the electronic control unit (32) is variable, wherein the electronic control unit (32) detects a drive speed-dependent signal, as a function of which a control signal for the controllable actuating means (38) can be generated by the control unit (32), which determines the maximum delivery volume the variable displacement pump (18) on the Fördervolumenverstelleinheit (24) by adjusting the stopper (23 ') changed.
Figure imgaf001
EP09177885A 2008-12-18 2009-12-03 Hydraulic system Withdrawn EP2199623A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810054876 DE102008054876A1 (en) 2008-12-18 2008-12-18 hydraulic system

Publications (2)

Publication Number Publication Date
EP2199623A2 EP2199623A2 (en) 2010-06-23
EP2199623A3 true EP2199623A3 (en) 2013-03-06

Family

ID=42065426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09177885A Withdrawn EP2199623A3 (en) 2008-12-18 2009-12-03 Hydraulic system

Country Status (2)

Country Link
EP (1) EP2199623A3 (en)
DE (1) DE102008054876A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013005774B4 (en) * 2013-04-05 2021-01-21 Robert Bosch Gmbh USE OF A VARIABLE SPEED HYDRAULIC PUMP DRIVEN BY A MOTOR AS A HYDROSTATIC TRANSMISSION
CN107489664B (en) * 2017-09-27 2019-03-15 徐州工业职业技术学院 A kind of load-sensitive and volumetric void fraction formula variable pump and electrohydraulic control system
CN107489663B (en) * 2017-09-27 2019-03-15 徐州工业职业技术学院 A kind of variable pump and the hydraulic control system with variable pump
CN107542729B (en) * 2017-09-27 2019-01-25 徐州工业职业技术学院 A kind of complex controll formula hydraulic pump and composite hydraulic control system
DE102023202498A1 (en) 2023-03-21 2024-09-26 Zf Friedrichshafen Ag Method for controlling a wheel loader, control, drive arrangement and wheel loader

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072442A (en) * 1975-07-04 1978-02-07 Takeshi Horiuchi Variable delivery hydraulic pump
US4726186A (en) * 1985-12-28 1988-02-23 Hitachi, Construction Machinery Co. Control system of hydraulic construction machinery
US5267441A (en) * 1992-01-13 1993-12-07 Caterpillar Inc. Method and apparatus for limiting the power output of a hydraulic system
GB2307009A (en) * 1995-11-13 1997-05-14 Nisshin Spinning A hydraulic drive unit and piston pump for use therein

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920010875B1 (en) 1988-06-29 1992-12-19 히다찌 겐끼 가부시기가이샤 Hydraulic drive system
JPH0374605A (en) 1989-08-16 1991-03-29 Komatsu Ltd Pressure oil feeder for working machine cylinder
GB0517698D0 (en) 2005-08-30 2005-10-05 Agco Gmbh Hydraulic system for utility vehicles, in particular agricultural tractors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072442A (en) * 1975-07-04 1978-02-07 Takeshi Horiuchi Variable delivery hydraulic pump
US4726186A (en) * 1985-12-28 1988-02-23 Hitachi, Construction Machinery Co. Control system of hydraulic construction machinery
US5267441A (en) * 1992-01-13 1993-12-07 Caterpillar Inc. Method and apparatus for limiting the power output of a hydraulic system
GB2307009A (en) * 1995-11-13 1997-05-14 Nisshin Spinning A hydraulic drive unit and piston pump for use therein

Also Published As

Publication number Publication date
EP2199623A2 (en) 2010-06-23
DE102008054876A1 (en) 2010-07-01

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