EP3385456A1 - Procédé de régulation d'un débit d'une machine de construction et système permettant de l'exécuter - Google Patents

Procédé de régulation d'un débit d'une machine de construction et système permettant de l'exécuter Download PDF

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Publication number
EP3385456A1
EP3385456A1 EP18166095.2A EP18166095A EP3385456A1 EP 3385456 A1 EP3385456 A1 EP 3385456A1 EP 18166095 A EP18166095 A EP 18166095A EP 3385456 A1 EP3385456 A1 EP 3385456A1
Authority
EP
European Patent Office
Prior art keywords
flow rate
working device
working
maximum position
supplied
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
EP18166095.2A
Other languages
German (de)
English (en)
Other versions
EP3385456B1 (fr
Inventor
Hee-Jun Jeong
Hong-Cheol YUN
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.)
HD Hyundai Infracore Co Ltd
Original Assignee
Doosan Infracore Co Ltd
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 Doosan Infracore Co Ltd filed Critical Doosan Infracore Co Ltd
Publication of EP3385456A1 publication Critical patent/EP3385456A1/fr
Application granted granted Critical
Publication of EP3385456B1 publication Critical patent/EP3385456B1/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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • 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
    • E02F9/2025—Particular purposes of control systems not otherwise provided for
    • E02F9/2033—Limiting the movement of frames or implements, e.g. to avoid collision between implements and the cabin
    • 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
    • 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
    • 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
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • 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
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E02F9/2214—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing the shock generated at the stroke end
    • 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
    • E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
    • 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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • 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
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member

Definitions

  • Example embodiments relate to a method of controlling a flow rate of a construction machine and a system for performing the same. More particularly, example embodiments relate to a method of controlling a flow rate supplied to working devices of an excavator, and a system for performing the method.
  • an excavator may include working devices such as a boom, an arm, an attachment, etc.
  • the boom may be operated by a boom cylinder.
  • the arm may be pivotally connected with the boom.
  • the arm may be operated by an arm cylinder.
  • the attachment may be pivotally connected with an end of the arm.
  • the attachment may be operated by an attachment cylinder.
  • the cylinders may be operated by a hydraulic pressure.
  • the boom, the arm and the attachment may have maximum rotation angles.
  • the boom, the arm and the attachment may have maximum positions, respectively.
  • the attachment may not be rotated any more although a flow rate may be continuously supplied to the attachment. Therefore, an unnecessary flow rate may be continuously supplied to the attachment located at the maximum position so that the flow rate may be wasted.
  • Example embodiments provide a method of controlling a flow rate of a construction machine that may be capable of preventing a flow rate from being wasted.
  • Example embodiments also provide a system for performing the above-mentioned method.
  • a method of controlling a flow rate of a construction machine In the method of controlling the flow rate of a construction machine, a rotation position of at least one of working devices in the construction machine including a boom, an arm and an attachment may be detected. Whether the rotation position of the working device may reach to a maximum position or not may be determined. When the rotation position of the working device may reach to the maximum position, a flow rate supplied to the working devices may be cut off.
  • detecting the rotation position of the working device may include detecting an angle of the working device or detecting a displacement of a cylinder configured to drive the working device.
  • cutting off the flow rate supplied to the working device may include controlling a spool of an electronic proportional pressure reducing (EPPR) valve regardless of an output voltage of an electric joystick configured to control operations of the working device.
  • EPPR electronic proportional pressure reducing
  • the method may further include gradually reducing the flow rate supplied to the working device before the working device may reach to the maximum position.
  • the method may further include reducing a discharge amount of a pump corresponding to a cut-off flow rate.
  • the method may further include supplying the cut-off flow rate to at least one of other working devices that may not reach to the maximum position.
  • the construction machine may include an excavator.
  • a system for controlling a flow rate of a construction machine may include a detection unit, an operation unit, a main control valve (MCV) controller and a main controller.
  • the detection unit may be configured to detect a rotation position of at least one of working devices in the construction machine including a boom, an arm and an attachment.
  • the operation unit may be configured to generate operational signals for operation the working devices.
  • the MCV controller may move a spool of a MCV in accordance with the operational signals of the operation unit to control a hydraulic pressure of a cylinder configured to drive the working device. When the rotation position of the working device may reach to the maximum position, the main controller may cut off a flow rate supplied to the working device.
  • the detection unit may include an angle sensor configured to detect rotation angles of the working devices or a displacement sensor configured to detect a displacement of the cylinder.
  • the main controller may transmit a control signal to the MCV controller configured to control the spool of an electronic proportional pressure reducing (EPPR) valve regardless of an output voltage of an electric joystick configured to control operations of the working device.
  • EPPR electronic proportional pressure reducing
  • the main controller may gradually reduce the flow rate supplied to the working device before the working device may reach to the maximum position.
  • the main controller may reduce a discharge amount of a pump corresponding to a cut-off flow rate.
  • the main controller may supply the cut-off flow rate to at least one of other working devices that may not reach to the maximum position.
  • the construction machine may include an excavator.
  • the flow rate may not be supplied to the working device located at the maximum position so that the flow rate may not be wasted. Further, the discharge amount of the pump corresponding to the cut-off flow rate may be decreased so that loads applied to an engine of the construction machine may be reduced. Furthermore, the cut-off flow rate may be supplied to the other working devices to increase a working speed of the other working devices so that the construction machine may have improved operational capacity.
  • FIGS. 1 to 6 represent non-limiting, example embodiments as described herein.
  • FIG. 1 is a block diagram illustrating a system for controlling a flow rate of a construction machine in accordance with example embodiments
  • FIG. 2 is a perspective view illustrating working devices of an excavator located at maximum positions to which the system in FIG. 1 is applied.
  • a system for controlling a flow rate of a construction machine in accordance with example embodiments may include a detection unit, an operation unit, a main control valve (MCV) controller 150 and a main controller 110.
  • MCV main control valve
  • the construction machine may include an excavator.
  • the excavator may include rotary parts and working devices operated by hydraulic pressures.
  • the working devices may include a boom B, an arm A and an attachment T.
  • the boom B may have a first end pivotally combined with the rotary part with respect to a first rotation axis.
  • the boom B may be operated by a boom cylinder.
  • the arm A may have a first end pivotally combined with a second end of the boom B opposite to the first end with respect to a second rotation axis.
  • the arm A may be operated by an arm cylinder.
  • the attachment T may have a first end pivotally combined with a second end of the arm A opposite to the first end with respect to a third rotation axis to perform an excavation.
  • the first, second and third rotation axes may be oriented toward substantially the same direction.
  • two rotation axes among the first to third rotation axes may be oriented toward substantially the same direction and a remaining rotation axis may be oriented toward a direction different from that of the two rotation axes.
  • the first to third rotation axes may be oriented toward different directions.
  • the attachment T may be operated by an attachment cylinder.
  • the attachment T may include a bucket.
  • the construction machine may include a wheel loader, pork lift, etc.
  • the detection unit may be configured to detect a rotation position of at least one among the working devices including the boom B, the arm A and the attachment T.
  • the detection unit may include a first sensor 130, a second sensor 132 and a third sensor 134.
  • the first sensor 130 may detect a rotation position of the boom B.
  • the boom B may be rotated from a maximum descent position B1 to a maximum ascent position B2.
  • the boom B may not be rotated downwardly.
  • the boom B may reach to the maximum ascent position B2
  • the boom B may not be rotated upwardly.
  • the maximum descent position B1 and the maximum ascent position B2 may correspond to a maximum position of the boom B.
  • the first sensor 130 may include an angle sensor configured to detect the rotation angle of the boom B.
  • the first sensor 130 may include a displacement sensor configured to detect a displacement of the boom cylinder configured to drive the boom B.
  • the second sensor 132 may detect a rotation position of the arm A.
  • the arm A may be rotated from a maximum descent position A1 to a maximum ascent position A2.
  • the arm A may not be rotated downwardly.
  • the arm A may reach to the maximum ascent position A2
  • the arm A may not be rotated upwardly.
  • the maximum descent position A1 and the maximum ascent position A2 may correspond to a maximum position of the arm A.
  • the second sensor 132 may include an angle sensor configured to detect the rotation angle of the arm A.
  • the second sensor 132 may include a displacement sensor configured to detect a displacement of the arm cylinder configured to drive the arm A.
  • the third sensor 134 may detect a rotation position of the attachment T.
  • the attachment T may be rotated from a maximum descent position T1 to a maximum ascent position T2.
  • the attachment T may not be rotated downwardly.
  • the attachment T may reach to the maximum ascent position T2
  • the attachment T may not be rotated upwardly.
  • the maximum descent position T1 and the maximum ascent position T2 may correspond to a maximum position of the attachment T.
  • the third sensor 134 may include an angle sensor configured to detect the rotation angle of the attachment T.
  • the third sensor 134 may include a displacement sensor configured to detect a displacement of the attachment cylinder configured to drive the attachment T.
  • the rotation position of the boom B detected by the first sensor 130, the rotation position of the arm A detected by the second sensor 132, and the rotation position of the attachment T detected by the third sensor 134 may be transmitted to the main controller 110.
  • the operation unit may be configured to generate operational signals for driving the working devices including the boom B, the arm A and the attachment T.
  • the operation unit may include a first electric joystick 140 and a second electric joystick 142.
  • the main controller 110 may receive output voltages in accordance with strokes of the first electric joystick 140 and/or the second electric joystick 142.
  • the main controller 110 may transmit control signals in accordance with the output voltages to the MCV controller 150.
  • the MCV controller 150 may move a spool 170 of an EPPR valve 160 to control the flow rate supplied to the working devices.
  • a worker may control the operations of the main controller 110 using a gauge panel.
  • the main controller 110 may determine any one of the boom B, the arm A and the attachment T located at the maximum position based on the information transmitted from the first to third sensors 130, 132 and 134.
  • the main controller 110 may cut off the flow rate supplied to the working device located at the maximum position. That is, the main controller 110 may set the flow rate, which may be supplied to the working device located at the maximum position, as zero. Thus, the flow rate may not be supplied to the working device located at the maximum position to prevent the flow rate from being wasted.
  • FIG. 3 is a graph showing relations between an output voltage and strokes of an electric joystick in the construction machine
  • FIG. 4 is a graph showing relations between a flow rate and an output voltage of the electric joystick
  • FIG. 5 is a graph showing relations between a flow rate and an angle of a working device controlled by the system in FIG. 1 .
  • the output voltages of the first and second electric joysticks 140 and 142 may be increased in proportion to the strokes of the first and second electric joysticks 140 and 142.
  • the main controller 110 may receive the output voltages of the first and second electric joysticks 140 and 142.
  • the main controller 110 may increase the supplies of the flow rate to the working devices.
  • the main controller 110 may cut off the flow rate to the working device located at the maximum position.
  • the main controller 110 may cut off the flow rate supplied to the working device located at the maximum position regardless of the output voltages of the first and second electric joysticks 140 and 142.
  • the main controller 110 may control the flow rate regardless of the output voltages in accordance with the strokes of the first and second electric joysticks 140 and 142.
  • the main controller 110 may gradually reduce the flow rate before the working device may reach to the maximum position.
  • the main controller 110 may completely cut off the flow rate supplied to the working device. That is, the flow rate supplied to the working device located at the maximum position may be about zero.
  • the system may include a capacity improvement mode and a fuel reduction mode.
  • the capacity improvement mode and the fuel reduction mode may be represented on the gauge panel 120.
  • the main controller 110 may supply a flow rate corresponding to the cut-off flow rate, which may not be supplied to the working device located at the maximum position, to any one of other working devices.
  • the flow rate corresponding to the cut-off flow rate may be supplied to any one of other working devices requiring a rapid working speed.
  • the main controller 110 may reduce a discharge amount of a pump corresponding to the cut-off flow rate, which may not be supplied to the working device located at the maximum position. Therefore, because the cut-off flow rate may not be discharged from the pump, the fuel may be reduced.
  • the boom B may reach to the maximum descent position B1 or the maximum ascent position B2, the boom B may not be rotated although the flow rate may be supplied to the boom B.
  • the main controller 110 may cut off the flow rate supplied to the boom B located at the maximum position.
  • the flow rate supplied to the boom B may be about zero.
  • the main controller 110 may supply the flow rate corresponding to the cut-off flow rate, which may not be supplied to the boom B located at the maximum position, to the arm A or the attachment T requiring the rapid working speed.
  • the main controller 110 may reduce the discharge amount of the pump corresponding to the cut-off flow rate, which may not be supplied to the boom B located at the maximum position. Therefore, because the cut-off flow rate may not be discharged from the pump, the fuel may be reduced.
  • the arm A When the arm A may reach to the maximum descent position A1 or the maximum ascent position A2, the arm A may not be rotated although the flow rate may be supplied to the arm A.
  • the main controller 110 may cut off the flow rate supplied to the arm A located at the maximum position. Thus, the flow rate supplied to the arm A may be about zero.
  • the main controller 110 may supply the flow rate corresponding to the cut-off flow rate, which may not be supplied to the arm A located at the maximum position, to the boom B or the attachment T requiring the rapid working speed.
  • the main controller 110 may reduce the discharge amount of the pump corresponding to the cut-off flow rate, which may not be supplied to the arm A located at the maximum position. Therefore, because the cut-off flow rate may not be discharged from the pump, the fuel may be reduced.
  • the attachment T When the attachment T may reach to the maximum descent position T1 or the maximum ascent position T2, the attachment T may not be rotated although the flow rate may be supplied to the attachment T.
  • the main controller 110 may cut off the flow rate supplied to the attachment T located at the maximum position. Thus, the flow rate supplied to the attachment T may be about zero.
  • the main controller 110 may supply the flow rate corresponding to the cut-off flow rate, which may not be supplied to the attachment T located at the maximum position, to the boom B or the arm A requiring the rapid working speed.
  • the main controller 110 may reduce the discharge amount of the pump corresponding to the cut-off flow rate, which may not be supplied to the attachment T located at the maximum position. Therefore, because the cut-off flow rate may not be discharged from the pump, the fuel may be reduced.
  • FIG. 6 is a flow chart illustrating a method of controlling a flow rate of a construction machine using the system in FIG. 1 .
  • the first sensor 130 may detect the rotation position of the boom B.
  • the second sensor 132 may detect the rotation position of the arm A.
  • the third sensor 134 may detect the rotation position of the attachment T.
  • the rotation position of the boom B detected by the first sensor 130, the rotation position of the arm A detected by the second sensor 132 and the rotation position of the attachment T detected by the third sensor 134 may be transmitted to the main controller 110.
  • the main controller 110 may determine any one of the boom B, the arm A and the attachment T located at the maximum position based on the information from the first to third sensors 130, 132 and 134.
  • step S210 the first to third sensors 130, 132 and 134 may again detect the rotation positions of the boom B, the arm A and the attachment T.
  • the main controller 110 may cut off the flow rate supplied to the working device located at the maximum position. That is, the main controller 110 may set the flow rate supplied to the working device, which may be located at the maximum position, as about zero. Thus, the flow rate may not be supplied to the working device located at the maximum position to prevent the flow rate from being wasted.
  • the cut-off flow rate supplied to the working device may include reducing the flow rate to a predetermined ratio or a maximumly zero. That is, the flow rate supplied to the working device may be maximumly reduced to the predetermined ratio based on errors of the sensors or flow rate controls.
  • the main controller 110 may cut off the flow rate supplied to the working device located at the maximum position regardless of the output voltages of the first and second electric joysticks 140 and 142.
  • the main controller 110 may control the flow rate regardless of the output voltages in accordance with the strokes of the first and second electric joysticks 140 and 142.
  • the main controller 110 may gradually reduce the flow rate before the working device may reach to the maximum position. When the working device may reach to the maximum position, the main controller 110 may completely cut off the flow rate supplied to the working device. That is, the flow rate supplied to the working device located at the maximum position may be about zero.
  • the boom B may reach to the maximum descent position B1 or the maximum ascent position B2, the boom B may not be rotated although the flow rate may be supplied to the boom B.
  • the main controller 110 may cut off the flow rate supplied to the boom B located at the maximum position.
  • the flow rate supplied to the boom B may be about zero.
  • the arm A When the arm A may reach to the maximum descent position A1 or the maximum ascent position A2, the arm A may not be rotated although the flow rate may be supplied to the arm A.
  • the main controller 110 may cut off the flow rate supplied to the arm A located at the maximum position. Thus, the flow rate supplied to the arm A may be about zero.
  • the attachment T When the attachment T may reach to the maximum descent position T1 or the maximum ascent position T2, the attachment T may not be rotated although the flow rate may be supplied to the attachment T.
  • the main controller 110 may cut off the flow rate supplied to the attachment T located at the maximum position. Thus, the flow rate supplied to the attachment T may be about zero.
  • step S240 whether the fuel reduction mode may be selected or not may be identified.
  • the main controller 110 may reduce a discharge amount of a pump corresponding to the cut-off flow rate, which may not be supplied to the working device located at the maximum position. Therefore, because the cut-off flow rate may not be discharged from the pump, the fuel may be reduced.
  • the main controller 110 may reduce the discharge amount of the pump corresponding to the cut-off flow rate, which may not be supplied to the boom B located at the maximum position. Therefore, because the cut-off flow rate may not be discharged from the pump, the fuel may be reduced.
  • the main controller 110 may reduce the discharge amount of the pump corresponding to the cut-off flow rate, which may not be supplied to the arm A located at the maximum position. Therefore, because the cut-off flow rate may not be discharged from the pump, the fuel may be reduced.
  • the main controller 110 may reduce the discharge amount of the pump corresponding to the cut-off flow rate, which may not be supplied to the attachment T located at the maximum position. Therefore, because the cut-off flow rate may not be discharged from the pump, the fuel may be reduced.
  • step ST260 whether the capacity improvement mode may be selected or not may be identified.
  • the main controller 110 may supply a flow rate corresponding to the cut-off flow rate, which may not be supplied to the working device located at the maximum position, to any one of other working devices.
  • the flow rate corresponding to the cut-off flow rate may be supplied to any one of other working devices requiring a rapid working speed.
  • the main controller 110 may supply the flow rate corresponding to the cut-off flow rate, which may not be supplied to the boom B located at the maximum position, to the arm A or the attachment T requiring the rapid working speed.
  • the working device requiring the rapid working speed may be identified from the strokes of the joysticks 140 and 142.
  • the main controller 110 may supply the flow rate corresponding to the cut-off flow rate, which may not be supplied to the arm A located at the maximum position, to the boom B or the attachment T requiring the rapid working speed.
  • the working device requiring the rapid working speed may be identified from the strokes of the joysticks 140 and 142.
  • the main controller 110 may supply the flow rate corresponding to the cut-off flow rate, which may not be supplied to the attachment T located at the maximum position, to the boom B or the arm A requiring the rapid working speed.
  • the working device requiring the rapid working speed may be identified from the strokes of the joysticks 140 and 142.
  • the flow rate may not be supplied to the working device located at the maximum position so that the flow rate may not be wasted. Further, the discharge amount of the pump corresponding to the cut-off flow rate may be decreased so that loads applied to an engine of the construction machine may be reduced. Furthermore, the cut-off flow rate may be supplied to the other working devices to increase a working speed of the other working devices so that the construction machine may have improved operational capacity.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
EP18166095.2A 2017-04-06 2018-04-06 Procédé de régulation d'un débit d'une machine de construction et système permettant de l'exécuter Active EP3385456B1 (fr)

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KR1020170044905A KR102054666B1 (ko) 2017-04-06 2017-04-06 건설 기계의 유량 제어 방법 및 이를 수행하기 위한 시스템

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EP3385456A1 true EP3385456A1 (fr) 2018-10-10
EP3385456B1 EP3385456B1 (fr) 2023-01-25

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EP (1) EP3385456B1 (fr)
KR (1) KR102054666B1 (fr)
CN (1) CN108691329B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11655616B2 (en) 2019-06-20 2023-05-23 Joy Global Surface Mining Inc. Industrial machine including automated dump control

Citations (4)

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EP0919670A1 (fr) * 1996-07-19 1999-06-02 Komatsu Ltd. Dispositif de reduction des chocs au point extreme de la course d'un engin de construction du type a fleche articulee
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KR102054666B1 (ko) 2020-01-22
CN108691329A (zh) 2018-10-23
CN108691329B (zh) 2024-03-01
EP3385456B1 (fr) 2023-01-25

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