EP4335981A1 - Machine de construction pourvu de système hydraulique - Google Patents

Machine de construction pourvu de système hydraulique Download PDF

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Publication number
EP4335981A1
EP4335981A1 EP22194607.2A EP22194607A EP4335981A1 EP 4335981 A1 EP4335981 A1 EP 4335981A1 EP 22194607 A EP22194607 A EP 22194607A EP 4335981 A1 EP4335981 A1 EP 4335981A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
construction machine
control
main control
machine according
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
EP22194607.2A
Other languages
German (de)
English (en)
Other versions
EP4335981B1 (fr
Inventor
Martin Inderelst
Stefan Pollmeier
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.)
XCMG European Research Center GmbH
Original Assignee
XCMG European Research Center GmbH
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 XCMG European Research Center GmbH filed Critical XCMG European Research Center GmbH
Priority to EP22194607.2A priority Critical patent/EP4335981B1/fr
Priority to US18/242,108 priority patent/US12221770B2/en
Publication of EP4335981A1 publication Critical patent/EP4335981A1/fr
Application granted granted Critical
Publication of EP4335981B1 publication Critical patent/EP4335981B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E02F9/2285—Pilot-operated systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • E02F3/434—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like providing automatic sequences of movements, e.g. automatic dumping or loading, automatic return-to-dig
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
    • E02F3/437—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant
    • 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
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves 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
    • E02F9/2221—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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • E02F9/2242—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance 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
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low capacity
    • 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20592—Combinations of pumps for supplying high and low pressure

Definitions

  • the invention relates to a construction machine with a hydraulic system with at least one hydraulic control, which includes at least one joystick, at least one hydraulic pressure source and two hydraulic drives, wherein the pressure level of each hydraulic drive can be different depending on the selected operating point of the drive, each hydraulic drive with Each pressure source is connected by means of a hydraulic connection, in which a main control valve is provided, which can be controlled by the one joystick or at least one of the joysticks, the construction machine comprising a plurality of components that can be moved at least relative to one another, each of which has a hydraulic drive for moving it component is assigned.
  • the object of the invention is to avoid the aforementioned disadvantages and to provide an improved construction machine with which an improved possibility for the execution of work processes, especially recurring work processes.
  • At least one hydraulic control comprises at least one electrically actuable priority valve designed as a proportional valve, which is assigned to a drive and is provided in its hydraulic connection, each priority valve being electrically connected to the electronic control unit and used to effect a additional hydraulic resistance can be controlled, the hydraulic control further comprising sensors provided on the movable components for the indirect or direct detection of their respective position, which are each connected to the control unit in order to pass on the detected sensor values to the control unit, with at least one trajectory in the control unit on the one hand can be stored and, on the other hand, a control mode can be activated, in which each priority valve can be controlled by the control unit using the values currently recorded by the sensors when the at least one joystick is actuated in such a way that the stored trajectory is driven by appropriate control of the drives.
  • At least one priority valve is actuated depending on the requirement to achieve the stored trajectory, so that either the hydraulic drive with the higher load is prioritized over the hydraulic drive with the lower load or, conversely, the hydraulic drive with the lower load is prioritized over the hydraulic drive with the higher load.
  • the drive with the lower load is subjected to more resistance, so that it is actually operated less than is actually specified by the operator of the construction machine by operating the joystick.
  • At least two hydraulic pressure sources can be provided, each hydraulic drive being connected to each pressure source by means of a hydraulic connection, and at least two hydraulic pressure sources having different pressure levels.
  • the priority valve in at least one hydraulic control, can be arranged in the corresponding hydraulic connection or the priority valves can be arranged in the corresponding hydraulic connections between the corresponding hydraulic pressure source and the main control valve connected to it, so that the respective priority valve is in front of the when viewed from the pressure source corresponding main control valve is provided.
  • the main control valves are each provided in the connection of a single pressure source with a single hydraulic drive.
  • a branch can initially be provided for each pressure source, from which two separate connections, each with a main control valve, lead to the two hydraulic drives.
  • the priority valve is or are preferably provided between the branch and the corresponding main control valve.
  • one of the two separate connections from each pressure source can be provided with a priority valve after the branching and lead to one drive, whereas the other of the two separate connections is not provided with a priority valve and leads to the other drive leads.
  • the two separate connections of the two pressure sources, each of which is provided with a priority valve can either lead to the same drive or each lead to different drives.
  • At least one main control valve can be designed as a hydraulically controlled main control valve, preferably each main control valve, can be designed as a hydraulically controlled main control valve, and on the other hand, the corresponding joystick provided for the hydraulic control can be designed as an at least partially hydraulic joystick, preferably as a fully hydraulic joystick can be designed, with which at least one of the existing hydraulically controlled main control valves, preferably each hydraulically controlled main control valve, can be controlled.
  • the main control valves can still be controlled compared to a hydraulic circuit with an electric joystick and electrically operated main control valves, even if the electrical components fail.
  • At least one electric motion sensor can be assigned to each hydraulic drive for detecting movements of the relevant hydraulic drive, so that in real time there is a corresponding control and also regulation of the priority valves in accordance with the respective movement of the relevant hydraulic drive, which is also dependent on external circumstances such as B. load, resistances etc. can be, is possible.
  • At least one electrical motion sensor can be assigned to each hydraulic drive for detecting movements of the relevant component that can be moved by the respective hydraulic drive.
  • At least one sensor for detecting the position of a movable component of the construction machine can be designed for the indirect or direct detection of the absolute position in space.
  • At least one sensor for detecting the position of a movable component of the construction machine for Detection of the relative position of this component in relation to the construction machine and / or another component of the construction machine can be designed.
  • At least one hydraulic drive preferably each hydraulic drive, can be assigned a pressure sensor connected to the control unit, which detects the hydraulic pressure acting on this hydraulic drive and passes it on to the control unit.
  • At least one main control valve in at least one hydraulic control, can be designed as an electrically controlled main control valve, preferably each main control valve can be designed as an electrically controlled main control valve, with at least one joystick as an at least partially electric, preferably as a fully electric joystick for control is formed by at least one, preferably every, existing electrically controlled main control valve.
  • this can be formed by two partial connections in the partial area after the main control valve in order to be able to effect different directions of movement of the drive.
  • the construction machine can be designed as a hydraulic excavator and comprise an undercarriage, a superstructure rotatably arranged thereon and a boom arm which is pivotably arranged on the superstructure.
  • the boom arm can be designed as an articulated arm with a first arm segment pivotably arranged on the superstructure and with a second arm segment pivotably arranged on the first arm segment, wherein a spoon can be pivotably arranged on the second arm segment.
  • the construction machine can be designed in such a way that with at least one hydraulic control, the two drives can cause different maximum forces and the hydraulic drive with the higher maximum force is assigned to the first arm segment for its pivoting, the hydraulic drive with the lower maximum force being assigned to the second arm segment the pivoting of which is assigned to the first arm segment.
  • At least one hydraulic drive can be designed as at least one hydraulic cylinder, preferably as a plurality of hydraulic cylinders provided in parallel, preferably each hydraulic drive can each be designed as at least one hydraulic cylinder, preferably as a plurality of hydraulic cylinders provided in parallel.
  • control mode can be activated at least manually.
  • sensor values can be stored in the control unit, for example in the form of a sensor value combination and / or a sensor value sequence, in which the control mode is to be activated, and an algorithm for evaluating the sensor values currently recorded by the sensors and, if there is a corresponding match with the sensor values and/or sensor value combination(s) and/or sensor value sequence(s) stored in the control unit, automatic activation of the control mode can be integrated.
  • an automatic mode can be activated in at least one hydraulic control in the control unit, in which the algorithm for automatically activating the control mode is active.
  • Fig. 1 relates to a construction machine, not shown in the drawing, with a hydraulic system with a hydraulic control 1, which includes a joystick, not shown in the drawing, a hydraulic pressure source 2 and two hydraulic drives 3, which are provided for moving components of the construction machine that are at least movable relative to one another and to that extent are each assigned to such a component.
  • a hydraulic control 1 which includes a joystick, not shown in the drawing, a hydraulic pressure source 2 and two hydraulic drives 3, which are provided for moving components of the construction machine that are at least movable relative to one another and to that extent are each assigned to such a component.
  • Each hydraulic drive 3 is connected to the pressure source 2 by means of a hydraulic connection 4.
  • a main control valve 6 is provided in each of these hydraulic connections 4, which can be controlled by the joystick.
  • the hydraulic drives 3 shown are designed either as a single hydraulic cylinder 5 or as two hydraulic cylinders 5 provided in parallel.
  • an electrically actuated priority valve 7 designed as a proportional valve is included.
  • the priority valve 7 is assigned to one of the two drives 3 and is provided in its hydraulic connection 4, namely between the hydraulic pressure source 2 and the main control valve 6 connected to it, so that the priority valve 7 is provided in front of the corresponding main control valve 6 when viewed from the pressure source 2 is.
  • the priority valve 7 is assigned to that drive 3, which is designed as a single hydraulic cylinder 5.
  • the main control valves 6 are each provided in the connection 4 of the pressure source 2 with a single hydraulic drive 3. Unless - as in Fig. 1 shown - in the pressure source 2 a branch 8 is initially provided, from then on two separate connections 4, each with a main control valve 6, lead to one of the two hydraulic drives 3.
  • the priority valve 7 is provided between the branch 8 and the corresponding main control valve 6.
  • all main control valves 6 are each designed as hydraulically controlled main control valves 6, which can be controlled by the joystick designed as an at least partially hydraulic joystick, preferably a fully hydraulic joystick. This means that the main control valves 6 can still be controlled even if the electrical components fail.
  • the priority valve 7 is electrically connected to an electronic control unit, not shown in the drawing, and can be controlled by this control unit to produce additional hydraulic resistance.
  • the hydraulic control 1 also includes sensors, not shown in the drawing, which are provided on the movable components for the indirect or direct detection of their respective position, which are each connected to the control unit in order to pass on the detected sensor values to the control unit.
  • sensors not shown in the drawing, which are provided on the movable components for the indirect or direct detection of their respective position, which are each connected to the control unit in order to pass on the detected sensor values to the control unit.
  • at least one trajectory can be stored in the control unit and, on the other hand, a control mode can be activated in which the priority valve 7 can be controlled by the control unit using the values currently recorded by the sensors when the joystick is actuated in such a way that the stored trajectory is activated by appropriate Control of the drives 3 is driven.
  • the priority valve 7 is actuated depending on the requirement to achieve the stored trajectory, so that either the hydraulic drive 3 with the higher load is prioritized over the hydraulic drive 3 with the lower load or vice versa hydraulic drive 3 with the lower load is prioritized over the hydraulic drive 3 with the higher load. Consequently, the drive 3 with the lower load is loaded with more resistance, so that it is actually operated less than is actually specified by the operator of the construction machine by operating the joystick.
  • Fig. 2 a second embodiment of the invention is shown. There are different from that in Fig. 1 shown object two hydraulic pressure sources 2 are provided with different pressure levels. Each hydraulic drive 3 is connected to both pressure sources 2 by means of a hydraulic connection 4, in each of which a main control valve 6 that can be controlled by the joystick is provided.
  • This exemplary embodiment also includes two electrically actuated priority valves 7 designed as proportional valves, both of which are assigned to one of the two drives 3 and are provided in its two hydraulic connections 4.
  • the two priority valves 7 are each arranged between the corresponding hydraulic pressure source 2 and the main control valve 6 connected thereto, so that the respective priority valve 7, viewed from the pressure source 2, is provided in front of the corresponding main control valve 6, namely between the branch 8 and the corresponding respective one Main control valve 6.
  • a branch 8 is initially provided for each pressure source 2, from which two separate connections 4, each with a main control valve 6, lead to one of the two hydraulic drives 3.
  • the priority valves 7 are each electrically connected to an electronic control unit, not shown in the drawing, and they can be controlled by this control unit to produce additional hydraulic resistance.
  • Fig. 3 shown embodiment also includes two hydraulic pressure sources 2 with different pressure levels as well as two electrically actuated priority valves 7 designed as a proportional valve. Different from that in Fig. 3 However, in the object shown, the two priority valves 7 are assigned to a single one of the two drives 3 and are provided in its two hydraulic connections 4.
  • the two priority valves 7 are assigned to the drive 3, which is designed as a single hydraulic cylinder 5.
  • the main control valves 6 are each provided in the connection 4 of a single pressure source 2 with a single hydraulic drive 3. Unless - as in Fig. 3 shown - a branch 8 is initially provided for each pressure source 2, from then on two separate connections 4, each with a main control valve 6, lead to one of the two hydraulic drives 3.
  • the priority valves 7 are each provided between the branch 8 and the corresponding main control valve 6.
  • all main control valves 6 are each designed as a hydraulically controlled main control valve 6, which can be controlled by the at least partially hydraulic joystick, preferably fully hydraulic joystick. This means that the main control valves can still be controlled even if the electrical components fail.
  • the priority valves 7 are each electrically connected to an electronic control unit, not shown in the drawing, and they can be controlled by this control unit to produce additional hydraulic resistance.
  • the hydraulic control 1 further comprises sensors provided on the movable components for the indirect or direct detection of their respective position, which are each connected to the control unit in order to pass on the detected sensor values.
  • sensors provided on the movable components for the indirect or direct detection of their respective position, which are each connected to the control unit in order to pass on the detected sensor values.
  • at least one trajectory can be stored in the control unit and, on the other hand, a control mode can be activated in which the priority valves 7 can be controlled by the control unit using the values currently recorded by the sensors when the joystick is actuated in such a way that the stored trajectory can be activated by corresponding Control of the drives 3 is driven.
  • the priority valves 7 are actuated depending on the requirement to achieve the stored trajectory, so that either the hydraulic drive 3 with the higher load is prioritized over the hydraulic drive 3 with the lower load or, conversely, the hydraulic drive 3 the lower load is prioritized over the hydraulic drive 3 with the higher load. Consequently, the drive 3 with the lower load is loaded with more resistance, so that it is actually operated less than is actually specified by the operator of the construction machine by operating the joystick.

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  • 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)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Operation Control Of Excavators (AREA)
EP22194607.2A 2022-09-08 2022-09-08 Machine de construction pourvu de système hydraulique Active EP4335981B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22194607.2A EP4335981B1 (fr) 2022-09-08 2022-09-08 Machine de construction pourvu de système hydraulique
US18/242,108 US12221770B2 (en) 2022-09-08 2023-09-05 Construction machine with a hydraulic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22194607.2A EP4335981B1 (fr) 2022-09-08 2022-09-08 Machine de construction pourvu de système hydraulique

Publications (2)

Publication Number Publication Date
EP4335981A1 true EP4335981A1 (fr) 2024-03-13
EP4335981B1 EP4335981B1 (fr) 2024-10-30

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EP22194607.2A Active EP4335981B1 (fr) 2022-09-08 2022-09-08 Machine de construction pourvu de système hydraulique

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US (1) US12221770B2 (fr)
EP (1) EP4335981B1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419673A1 (fr) * 1989-03-22 1991-04-03 Hitachi Construction Machinery Co., Ltd. Unite de commande hydraulique pour engins de construction et de genie civil
US20210131074A1 (en) * 2017-08-29 2021-05-06 Komatsu Ltd. Control system for work vehicle, method, and work vehicle
US20220010523A1 (en) * 2019-03-28 2022-01-13 Sumitomo Construction Machinery Co., Ltd. Excavator and work system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744497B1 (fr) * 1996-02-07 1998-04-03 Rexroth Sigma Dispositif de distribution hydraulique multiple
GB0614534D0 (en) * 2006-07-21 2006-08-30 Artemis Intelligent Power Ltd Fluid power distribution and control system
EP2660478B1 (fr) * 2010-12-27 2017-03-15 Volvo Construction Equipment AB Système de commande hydraulique d'entraînement combiné flèche/pivot pour machine de construction
DE102011106307A1 (de) * 2011-07-01 2013-01-03 Robert Bosch Gmbh Steueranordnung und Verfahren zum Ansteuern von mehreren hydraulischen Verbrauchern
EP3594414B1 (fr) * 2017-03-10 2023-01-18 Sumitomo (S.H.I.) Construction Machinery Co., Ltd. Pelle
KR102065478B1 (ko) * 2017-04-10 2020-01-13 가부시키가이샤 고마쓰 세이사쿠쇼 건설 기계 및 제어 방법
JP6676827B2 (ja) * 2017-05-09 2020-04-08 日立建機株式会社 作業機械
DE102018117949A1 (de) * 2018-07-25 2020-01-30 Putzmeister Engineering Gmbh Hydrauliksystem und Verfahren zum Steuern eines Hydrauliksystems
CN109654074B (zh) * 2018-12-26 2020-04-07 太原理工大学 一种工程机械液压系统
DE102019216771A1 (de) * 2019-10-30 2021-05-06 Robert Bosch Gmbh Hydraulische Steueranordnung zur Druckmittelversorgung wenigstens zweier hydraulischer Verbraucher

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419673A1 (fr) * 1989-03-22 1991-04-03 Hitachi Construction Machinery Co., Ltd. Unite de commande hydraulique pour engins de construction et de genie civil
US20210131074A1 (en) * 2017-08-29 2021-05-06 Komatsu Ltd. Control system for work vehicle, method, and work vehicle
US20220010523A1 (en) * 2019-03-28 2022-01-13 Sumitomo Construction Machinery Co., Ltd. Excavator and work system

Also Published As

Publication number Publication date
EP4335981B1 (fr) 2024-10-30
US20240084555A1 (en) 2024-03-14
US12221770B2 (en) 2025-02-11

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