EP2199622A2 - Système hydraulique - Google Patents

Système hydraulique Download PDF

Info

Publication number
EP2199622A2
EP2199622A2 EP09177880A EP09177880A EP2199622A2 EP 2199622 A2 EP2199622 A2 EP 2199622A2 EP 09177880 A EP09177880 A EP 09177880A EP 09177880 A EP09177880 A EP 09177880A EP 2199622 A2 EP2199622 A2 EP 2199622A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic system
control
pressure difference
control unit
hydraulic
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
EP09177880A
Other languages
German (de)
English (en)
Other versions
EP2199622A3 (fr
EP2199622B1 (fr
Inventor
Marcus Bitter
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 EP2199622A2 publication Critical patent/EP2199622A2/fr
Publication of EP2199622A3 publication Critical patent/EP2199622A3/fr
Application granted granted Critical
Publication of EP2199622B1 publication Critical patent/EP2199622B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F15B2211/25—Pressure control functions
    • F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load pressure
    • 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
    • F15B2211/665—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
    • F15B2211/6653—Pressure control

Definitions

  • the invention relates to a hydraulic system with a drive motor, a driven by the drive motor hydraulic variable displacement pump driven by the variable displacement hydraulic consumer and an electronic control unit, wherein the variable displacement pump is equipped with a flow regulator, with which adjusting between consumer and variable pressure difference on a preset control pressure difference value is adjustable.
  • Agricultural machines are known, for example tractors, or other types of working machines, such as construction machines or telescopic loaders, which have a hydraulic system with which one or more hydraulic consumers are operated, eg hydraulic cylinders, hydraulic motors or other hydraulically operated components.
  • hydraulic systems include hydraulic pumps which translate directly or via a rigid transmission gear into fast or slow, with the drive shaft, a drive motor are connected.
  • the maximum deliverable volume flow of the hydraulic pump thus changes with the speed of the drive motor. The faster the drive motor turns, the larger the volume flow that can be delivered by the hydraulic pump.
  • hydraulic variable displacement pumps so-called hydraulic variable displacement pumps, as they are used today as state of the art, the subsidized maximum delivery volume can be adapted to the demand required by the hydraulic consumer.
  • a so-called flow regulator which is a preset control pressure difference between the pressure at the output of the variable and the consumer reported Load sense signal (called LS signal below) regulates or maintains.
  • the delivery flow regulator of an LS-controlled variable displacement pump now works in such a way that it adjusts the delivery volume flow of the variable displacement pump so that the preset control pressure difference, which can be set permanently on the delivery flow regulator via an adjusting spring, is always kept constant.
  • the exact mode of action of such a (pressure) flow regulator can be read in the relevant literature and is as such prior art.
  • the baintellhim may for example comprise a swash plate which is connected to control or reciprocating piston, wherein the rotary motion is converted into a longitudinal movement of the reciprocating piston by rotating the swash plate becomes.
  • the volume flow conveyed by the variable flow pump flows through the lines and valves of the hydraulic system and generates certain pressure losses in the lines and at the respective valves to the consumers.
  • the pressure, which then sets behind the valves or at the consumer, is reported as load pressure (LS signal) back to the variable displacement pump (via a load pressure line (LS line), which is connected to the flow regulator) and causes the variable displacement pump to do so
  • LS signal load pressure
  • LS line load pressure line
  • valves which are farther away from the variable displacement pump than other valves will allow less volumetric flow to reach a consumer, although there are valves of the same type.
  • valves that report an increased load signal to the pump such as in the EP 176 0 325 A2 is disclosed.
  • the object underlying the invention is seen to provide a hydraulic system of the type mentioned, by which the aforementioned problems are overcome.
  • a hydraulic system is to be created with simple, safe and cost-effective means, which provides a large delivery volume at low input speeds, but limits this at higher input speeds to a certain maximum value.
  • a hydraulic system of the type mentioned above is formed such that the flow regulator by the control unit comprises controllable actuating means, through which the control pressure differential value on the delivery flow controller via the electronic control unit is variable, wherein the electronic control unit detects a drive speed-dependent signal, as a function of which a control signal for the controllable actuating means can be generated by the control unit, which change the control pressure difference value on the flow controller.
  • variable displacement pump has the option of delivering delivery volumetric flows of Vmax l / min at a maximum input speed, which would lead to high losses in the lines and valves.
  • this pump now conveys eg a maximum volumetric flow rate of Vleer l / min (Vleer ⁇ V1 ⁇ Vmax) and with increasing input speed (U +) the volumetric flow rate (V) increases.
  • control pressure difference value When a presettable input speed value is exceeded, the control pressure difference value can be changed in proportion to the input speed, wherein the control unit reduces the control pressure difference value with increasing input speed and increases with decreasing input speed.
  • control signal generated by the control unit is preferably continuously adapted to a drive speed change, so that an operator of the Systems does not notice the change in the volume of delivery directly.
  • control pressure difference value via the adjusting means is variable, such that the control pressure difference value can be reduced or increased independently of the drive speed.
  • an operator can quasi “override” the control of the control means taken control of the flow control valve and disable by appropriate inputs to the setting means, for example on an input module or on an input button with thumbwheel or a potentiometer the drive speed-dependent control function of the control unit and by directly specifying a via the setting means predeterminable input signal modify the control signal, so that despite the original drive speed-dependent generation of a control signal, the signal input by the setting means is prioritized.
  • the hydraulic system may further include a temperature sensor that detects the temperature in the hydraulic system and provides a corresponding signal to the control unit.
  • the viscosity of a hydraulic fluid depends on the temperature, so that it may be advantageous, at low temperatures, or at a high viscosity of the hydraulic fluid to adjust the control pressure difference value on the flow regulator further depending on the viscosity or temperature, for example, to increase .
  • control pressure difference value on the delivery flow regulator may be advisable to adapt to the lower flow losses at higher temperatures, that is to say to reduce it, for example.
  • both depending on the input speed alone, as well as in combination depending on the temperature in the hydraulic system can enter state conditions for which an adjustment of the control pressure differential value at the flow controller is advantageous.
  • Corresponding control functions or control algorithms can be implemented in the electronic control and stored as corresponding state diagrams be. Based on these control functions or control algorithms corresponding control signals, both in dependence on the drive speed, as well as in dependence on the temperature, for driving the actuating means or for adjusting the control pressure difference value can be generated at the flow controller.
  • the adjusting means on the delivery flow regulator preferably comprise an electric motor, which can be controlled by the control unit and can adjust the adjusting spring in the delivery flow regulator. Furthermore, it is also conceivable to use an electromagnet which adjusts the adjusting spring in the flow regulator.
  • the adjustment of the flow control valve or the adjusting spring should be made directly to the bias of the adjusting spring of the flow control valve. This adjustment can be effected electrically or electromagnetically as mentioned above, but also hydraulically, pneumatically or purely mechanically, with an electrical or electromagnetic adjustment being preferred, since this adjustment is easier to handle than other types of adjustment. This adjustment can now increase or decrease the spring preload, whereby the control pressure difference is automatically adjusted.
  • the adjustment can take place, for example, via a proportional magnet which is effective in both directions.
  • a proportional magnet which is effective in both directions.
  • the stepper motor has the advantage that it has a certain self-locking and can be moved very precisely in a certain position (angle of rotation), which he does not leave, unless he gets a new control signal or a very strong force pulls at him.
  • Such a stepper motor can be easily connected to the adjusting screw for adjusting the control pressure difference of the flow control valve and can then very accurately and very quickly turn this adjusting screw depending on the control signal, so that the control pressure difference can be adjusted very sensitively. Should a failure of the electronics occur, the stepper motor would simply remain in its last position, thus ensuring that at least a certain minimum operation of the hydraulic system remains ensured.
  • An inventive hydraulic system is used in work vehicles used in agriculture, ie in agricultural vehicles, such as tractors with or without front loader and telescopic loaders. Furthermore, such a hydraulic system is also suitable for use in construction machines, for example in excavators or wheel loaders.
  • the hydraulic system according to the invention enables optimum operation of a hydraulic system in all drive-dependent operating states of the vehicle and serves, in particular, to reduce power losses and to provide large volume flows at low drive speeds. Furthermore, existing smaller line cross-sections and valves can be used in spite of a variable displacement pump. If required, very large flow rates are possible despite small pipe cross-sections and valves. A retention of existing valves and lines, regardless of the use of a larger variable displacement pump, this is possible. Furthermore, it can be ensured in spite of electronic control of the flow control valve in case of failure of the electrical system that the existing hydraulic system is still available.
  • FIG. 1 shows a hydraulic system 10 for operating a hydraulic consumer 12, for example a hydraulic cylinder for raising and lowering a front loader 14.
  • the hydraulic system 10 comprises a hydraulic tank 16, a hydraulic variable displacement pump 18 with a delivery flow regulator 20 for setting a control pressure difference value between the variable displacement pump 18 and the consumer 12, a pressure limiter 22 for limiting the operating pressure for the variable displacement pump 18, and an adjusting piston 23 for adjusting and limiting the delivery volume of the variable displacement pump 18 which can be adjusted by means of a delivery volume adjusting unit 18. Further, a stop 23 designed as an adjusting spindle is provided provided for the adjusting piston 23 which is engageable with the adjusting piston 23 into engagement and with which a maximum delivery volume of the variable displacement pump 18 is adjustable.
  • the variable displacement pump 18 is driven by a drive motor 25. Between the consumer 12 and variable displacement pump 18, a hydraulic control valve 26 is connected, via which the hydraulic consumer 12 is controlled.
  • a load pressure line 28 is connected, which is connected to the flow regulator 20, wherein the load pressure line 28 has a connected to the tank 16 pressure relief diaphragm 29 and a closing in the direction of the consumer 12 check valve 30, wherein the check valve 30 between the Pressure relief diaphragm 29 and the consumer 12 is arranged.
  • the hydraulic system 10 has an electronic control unit 32 which is connected to a speed sensor 34 and an adjusting device 36.
  • the delivery flow regulator 20 has adjusting means 38, which are designed as electric motors, preferably as stepping motors, and can be controlled by the electronic control unit 32.
  • the drive motor 25 is connected directly to the variable displacement pump 18, which is shown here only by way of example. Of course, here also sub or transmission gear can be interposed.
  • the electronic control unit 32 may receive input signals from the adjustment device 36, which then takes into account in the generation of a control signal for the actuating means 38. In the generation of a control signal, only a speed signal supplied by the rotational speed sensor 34 is considered in the first place, as a function of which the electronic control unit 32 generates the control signal for the actuating means 38.
  • the delivery flow regulator 20 which is preset with a fixed control pressure difference value via a biasing spring 40, can now be adjusted by adjusting the bias of the biasing spring 40 via the adjusting means 38, so that the control pressure differential value can be both raised and lowered.
  • a pressure difference which is the flow controller 20 via the load-sensing pressure line 28 and a connected to the output of the variable displacement pump 18 control pressure line 42.
  • the adjusting piston 23 connected to the delivery flow regulator 20 via the pressure limiter 22 is brought into a corresponding control position.
  • the delivery volume adjusting unit 24 of the variable displacement pump 18 is adjusted.
  • the delivery volume of the variable displacement pump 18 is controlled or regulated via the regulating pressure differential value set on the delivery flow regulator 20.
  • the regulating pressure difference value on the delivery flow regulator 20 can be adjusted by way of the biasing spring 40, so that the regulating pressure difference value can be adjusted via the adjusting means 38 connected to the pretensioning spring 40 and can thus be controlled or adjusted or regulated via the electronic control unit.
  • a control of the actuating means 38 on the delivery flow regulator 20 and thus of the delivery volume of the variable displacement pump 18 can be made.
  • stored or stored threshold values are preferably implemented in the electronic control unit 32, by means of which a corresponding control program can be started so that, for example, after reaching a predefinable speed value on the drive motor 25, the control pressure differential value is reduced further as a function of the further increasing speed To reduce delivery volume accordingly and to limit the flow rate.
  • an operator can now "lever out” or “override” the preset threshold values, so that independently of the rotational speed, a control of the actuating means 38 which can be predetermined via the adjusting means 36 can take place.
  • the control pressure difference value can be set to a constant value via the setting means 36, wherein the control unit 32 then controls the setting means 38 independently of the rotational speed of the drive motor 25.
  • the adjusting means 36 may comprise a plurality of occupied switches or an input display or an adjustable potentiometer, etc., with which corresponding setting variables can be specified.
  • activation or deactivation of the speed-dependent control of the delivery flow regulator 20 can also take place via the adjustment means 36.
  • the temperature sensor 37 detects, as already mentioned, the temperature of the hydraulic fluid and supplies a corresponding temperature signal to the control unit 32.
  • the control unit 32 both in dependence on the drive speed alone and in combination depending on the temperature, the control pressure difference value on the flow controller by adjusting the Adjusting means 38 change or control or regulate.
  • the control pressure difference value on the delivery flow regulator can additionally be reduced or increased as a function of the temperature of a hydraulic fluid of the hydraulic system 10.
  • Corresponding control signals are generated by control functions or control algorithms implemented in the control unit 32 as a function of the drive speed and / or of the temperature.
  • an electric proportional solenoid 38 ' is used as shown in FIG. 2 .
  • the proportional magnet 38 ' is preferably also effective in both directions, wherein generally an adjustment of the flow controller 20 in only one direction is quite conceivable, so that, for example, only a reduction of the control pressure difference value is made possible.

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)
  • Operation Control Of Excavators (AREA)
  • Control Of Fluid Gearings (AREA)
EP09177880.3A 2008-12-18 2009-12-03 Système hydraulique Active EP2199622B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008054880A DE102008054880A1 (de) 2008-12-18 2008-12-18 Hydrauliksystem

Publications (3)

Publication Number Publication Date
EP2199622A2 true EP2199622A2 (fr) 2010-06-23
EP2199622A3 EP2199622A3 (fr) 2013-03-06
EP2199622B1 EP2199622B1 (fr) 2017-09-20

Family

ID=42066223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09177880.3A Active EP2199622B1 (fr) 2008-12-18 2009-12-03 Système hydraulique

Country Status (3)

Country Link
US (1) US8495871B2 (fr)
EP (1) EP2199622B1 (fr)
DE (1) DE102008054880A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3263954A1 (fr) * 2016-06-28 2018-01-03 Thomas Magnete GmbH Entrainement hydrostatique comprenant un circuit ferme et procede de fonctionnement de l'entrainement

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101850807B1 (ko) * 2011-09-07 2018-04-20 가부시키가이샤 히다치 겡키 티에라 건설 기계
US9145660B2 (en) * 2012-08-31 2015-09-29 Caterpillar Inc. Hydraulic control system having over-pressure protection
CN103790873A (zh) * 2012-10-31 2014-05-14 博世力士乐（常州）有限公司 液压驱动装置及系统
AU2013201057B2 (en) * 2012-11-06 2014-11-20 SINGH, Kalvin Jit MR Improvements in and Relating to Load Transfer
CN102996537B (zh) * 2012-11-15 2014-12-24 四川宏华石油设备有限公司 一种动力水龙头无级调速液压系统
US9518655B2 (en) 2013-01-29 2016-12-13 Deere & Company Continuously adjustable control management for a hydraulic track system
DE102013008792B4 (de) 2013-05-23 2016-12-22 Thomas Magnete Gmbh Verfahren und Vorrichtung zur Verstellung einer hydraulischen Verstellpumpe
DE102013008793B4 (de) 2013-05-23 2017-10-19 Thomas Magnete Gmbh Verfahren und Vorrichtung zur Verstellung einer Verstellpumpe im offenen Hydraulikkreislauf
US10085320B1 (en) * 2016-10-21 2018-09-25 Peter Sussman Pre-calibrated light box
CN108071620A (zh) * 2016-11-16 2018-05-25 丹佛斯动力系统（浙江）有限公司 电控阀、液压泵、和具备可切换控制功能的液压泵系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226800A (en) * 1989-09-22 1993-07-13 Kabushiki Kaisha Komatsu Seisakusho Displacement controlling circuit system for variable displacement pump
EP0877168A1 (fr) * 1996-11-21 1998-11-11 Hitachi Construction Machinery Co., Ltd. Dispositif d'entrainement hydraulique
US6308516B1 (en) * 1998-05-22 2001-10-30 Komatsu Ltd. Control device for hydraulically-operated equipment
WO2007007460A1 (fr) * 2005-07-13 2007-01-18 Hitachi Construction Machinery Co., Ltd. Dispositif d’entraînement hydraulique

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4886422A (en) * 1987-07-09 1989-12-12 Tokyo Keiki Company Ltd. Control apparatus of variable delivery pump
KR920010875B1 (ko) 1988-06-29 1992-12-19 히다찌 겐끼 가부시기가이샤 유압구동장치
WO1990008263A1 (fr) * 1989-01-18 1990-07-26 Hitachi Construction Machinery Co., Ltd. Unite de commande hydraulique pour engin de construction
JPH0374605A (ja) 1989-08-16 1991-03-29 Komatsu Ltd 作業機シリンダの圧油供給装置
DE4127342C2 (de) * 1991-08-19 1995-02-16 Danfoss As Hydraulisches System mit einer Pumpe
KR950019129A (ko) * 1993-12-30 1995-07-22 김무 유압식 건설기계의 엔진-펌프 제어장치 및 방법
DE19622267C1 (de) * 1996-06-03 1997-12-18 Sauer Sundstrand Gmbh & Co Steuer- und Regelsystem für verstellbare Hydraulikpumpen mit Maximaldruckbegrenzung
DE19644961A1 (de) * 1996-10-29 1998-04-30 Samsung Heavy Ind Verfahren zum Steuern des Motor-Pumpe-Systems einer hydraulischen Baumaschine
JP3561667B2 (ja) * 1999-11-18 2004-09-02 新キャタピラー三菱株式会社 油圧ポンプの制御装置
JP3775245B2 (ja) * 2001-06-11 2006-05-17 コベルコ建機株式会社 建設機械のポンプ制御装置
DE112005000052B4 (de) * 2004-07-14 2010-01-14 Komatsu Ltd. Steuervorrichtung für eine Arbeitsmaschinen-Hydraulikpumpe eines Arbeitsfahrzeugs
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
US5226800A (en) * 1989-09-22 1993-07-13 Kabushiki Kaisha Komatsu Seisakusho Displacement controlling circuit system for variable displacement pump
EP0877168A1 (fr) * 1996-11-21 1998-11-11 Hitachi Construction Machinery Co., Ltd. Dispositif d'entrainement hydraulique
US6308516B1 (en) * 1998-05-22 2001-10-30 Komatsu Ltd. Control device for hydraulically-operated equipment
WO2007007460A1 (fr) * 2005-07-13 2007-01-18 Hitachi Construction Machinery Co., Ltd. Dispositif d’entraînement hydraulique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3263954A1 (fr) * 2016-06-28 2018-01-03 Thomas Magnete GmbH Entrainement hydrostatique comprenant un circuit ferme et procede de fonctionnement de l'entrainement
WO2018001547A1 (fr) * 2016-06-28 2018-01-04 Thomas Magnete Gmbh Transmission hydrostatique en circuit fermé et procédé pour faire fonctionner ladite transmission
US10683929B2 (en) 2016-06-28 2020-06-16 Thomas Magnete Gmbh Hydrostatic drive having a closed circuit and method for operating the drive

Also Published As

Publication number Publication date
EP2199622A3 (fr) 2013-03-06
DE102008054880A1 (de) 2010-07-01
EP2199622B1 (fr) 2017-09-20
US20100154404A1 (en) 2010-06-24
US8495871B2 (en) 2013-07-30

Similar Documents

Publication Publication Date Title
EP2199622B1 (fr) Système hydraulique
EP3770419B1 (fr) Dispositif d'alimentation en milieux de pression hydraulique, procédé et machine de travail mobile
EP1642035B1 (fr) Systeme hydraulique
DE112012004874B4 (de) Hydraulisches Antriebssystem
DE3934641C2 (fr)
EP3567167A2 (fr) Dispositif de commande hydraulique pour un ensemble de machines de travail mobiles et ensemble de machines de travail mobiles
DE3048554A1 (de) Motordrehzahl-regeleinrichtung
EP2628862B1 (fr) Machine de travail mobile avec production d'énergie pour l'entraînement du refroidissement du moteur
DE112012003500T5 (de) Hydraulisches Antriebssystem
DE2508620A1 (de) Regelsystem fuer einen traktor
EP3748168B1 (fr) Système d'entraînement hydraulique à deux pompes et à récupération d'énergie
DE19538649A1 (de) Leistungsregelung mit Load-Sensing
DE10010670C2 (de) Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge
EP2199623A2 (fr) Système hydraulique
EP2375086A2 (fr) Installation hydraulique
EP2049800B1 (fr) Pompe de circulation
DE4136396A1 (de) Hydrauliksystem fuer ein fahrzeug
WO2013083234A1 (fr) Système d'entraînement hydrostatique
DE102012208938A1 (de) Closed-Center-Steuereinrichtung mit Konstant- und Verstellpumpe
DE10308289B4 (de) LS-Wegeventilblock
EP3517790B1 (fr) Machine de travail pourvu d'hydraulique destinée à la récupération d'énergie
WO2014001043A1 (fr) Dispositif d'entrainement hydraulique
DE3146513C2 (fr)
DE112009001698B4 (de) Anordnung und Verfahren zur unterbrechungsfreien Versorgung eines Hydrauliksystems mit einem Fluid
EP4118334B1 (fr) Dispositif de régulation d'une pompe hydraulique ou d'un moteur hydraulique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

RIC1 Information provided on ipc code assigned before grant

Ipc: E02F 9/22 20060101ALI20130131BHEP

Ipc: F15B 11/042 20060101AFI20130131BHEP

Ipc: F04B 49/06 20060101ALI20130131BHEP

17P Request for examination filed

Effective date: 20130906

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20170420

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 930392

Country of ref document: AT

Kind code of ref document: T

Effective date: 20171015

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502009014382

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20170920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171220

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180120

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009014382

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20180621

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20171220

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171203

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20171231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171203

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171231

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171220

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20091203

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170920

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231227

Year of fee payment: 15

Ref country code: FI

Payment date: 20231227

Year of fee payment: 15

Ref country code: DE

Payment date: 20231121

Year of fee payment: 15

Ref country code: AT

Payment date: 20231121

Year of fee payment: 15