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WO2012033233A1 - Dispositif de commande du débit pour une pompe hydraulique du type à cylindrée variable pour engin de chantier - Google Patents

Dispositif de commande du débit pour une pompe hydraulique du type à cylindrée variable pour engin de chantier Download PDF

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Publication number
WO2012033233A1
WO2012033233A1 PCT/KR2010/005742 KR2010005742W WO2012033233A1 WO 2012033233 A1 WO2012033233 A1 WO 2012033233A1 KR 2010005742 W KR2010005742 W KR 2010005742W WO 2012033233 A1 WO2012033233 A1 WO 2012033233A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow rate
hydraulic pump
control device
actuator
variable displacement
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.)
Ceased
Application number
PCT/KR2010/005742
Other languages
English (en)
Korean (ko)
Inventor
이상희
정해균
신흥주
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.)
Volvo Construction Equipment AB
Original Assignee
Volvo Construction Equipment AB
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 Volvo Construction Equipment AB filed Critical Volvo Construction Equipment AB
Priority to JP2013528094A priority Critical patent/JP5719440B2/ja
Priority to CN201080069025.7A priority patent/CN103097743B/zh
Priority to EP10857020.1A priority patent/EP2615311A1/fr
Priority to PCT/KR2010/005742 priority patent/WO2012033233A1/fr
Priority to KR1020137004529A priority patent/KR20130143552A/ko
Priority to US13/821,452 priority patent/US20130160439A1/en
Publication of WO2012033233A1 publication Critical patent/WO2012033233A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • F15B13/0433—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being pressure control valves
    • 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
    • E02F9/2282—Systems using center bypass type changeover valves
    • 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
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • 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
    • F15B9/02—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 with servomotors of the reciprocatable or oscillatable type
    • F15B9/04—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 with servomotors of the reciprocatable or oscillatable type controlled by varying the output of a pump with variable 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
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable 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
    • F15B2211/255—Flow control functions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Definitions

  • the present invention relates to a flow rate control device for a variable displacement hydraulic pump for a construction machine including an excavator, and more particularly, a required flow rate required by a plurality of actuators in a complex operation of a construction machine working device by a preset controller.
  • a preset controller By controlling the opening area of the hydraulic pump to be large, it is possible to improve the pressure loss and fuel economy of the hydraulic pump, and in addition, when operating the hydraulic pump, the hydraulic pump discharges a relatively small flow rate compared to the operation amount of each working device.
  • the present invention relates to a flow control device for a variable displacement hydraulic pump for a construction machine, which is improved to be widely formed.
  • Construction machinery including an excavator or hydraulic shovel is provided with a hydraulic circuit so that a work device including a boom or an arm, a bucket and a swing motor is driven by the hydraulic pressure discharged from the hydraulic pump.
  • the hydraulic excavator 1 typically includes a crawler type lower traveling body 2 and an upper swinging structure 3 which is pivotally supported on an upper portion of the lower traveling body 2. And a plurality of working devices mounted on the upper swing body 3, wherein the working device includes a boom 5 and an arm 6 whose proximal ends are supported by one side of the upper swing body 3 so as to be raised and lowered. And a bucket 7 mounted to the distal end of the boom 5, and a swing motor (not shown) that provides power when the upper swing body 3 swings.
  • one variable displacement hydraulic pump is used to supply hydraulic pressure to a plurality of working devices according to the specifications of the equipment.
  • a multiple actuator 14 is controlled by an operating device including an operating lever or a joystick.
  • the sum of the required flow rates for the actuator for the work device during operation is controlled by the discharge flow rate of the hydraulic pump.
  • the discharge flow rate of the variable displacement hydraulic pump during the combined operation is determined by the flow rate required by the actuator of each work device, which is controlled as follows.
  • the first actuator can be interpreted as the boom actuator 14a, the second actuator as the bucket actuator 14c, the third actuator as the swing motor (not shown), and the work device mounted on the hydraulic construction machine is Of course, it can be added.
  • Korean Patent Laid-Open No. 2001-0033699 in the hydraulic excavator flow control device, in order to control the output flow rate of the hydraulic pump to a predetermined distribution flow rate for each hydraulic actuator in consideration of the problem of poor operability in the complex operation Flow control devices have been disclosed.
  • the total absolute value of the required flow rate of the hydraulic actuator is calculated and used as the pump demand flow rate control method. Therefore, it is possible to control the distribution by the distribution flow rate per actuator for the work device while avoiding the sum of the required flow rates of the hydraulic actuators being larger than the maximum discharge flow rate of the hydraulic pump during the complex operation.
  • the hydraulic control method using the absolute sum of the required flow rate of the hydraulic actuator described above can also avoid the disadvantage that the distribution flow rate becomes larger than the required flow rate required by the operation of the control lever or the joystick control device, The problem that pressure loss occurs and the maximum discharge flow rate of the hydraulic pump is quickly reached during the combined operation, and the discharge flow rate control range of the hydraulic pump is reduced by the operating device, and thus, the solution for the problem of inferior operability cannot be solved.
  • the present invention has been made to solve the above-mentioned problems, and the pressure loss is controlled by controlling the discharge flow rate of the hydraulic pump so as to have an effect of widening the opening area according to the matching condition of the required flow rate of the actuator for the work device during the compound operation. It is an object of the present invention to provide a flow control device for a variable displacement hydraulic pump for construction machinery that can reduce and improve fuel efficiency.
  • the flow control apparatus of a variable displacement hydraulic pump for a construction machine according to the present invention includes an engine and an opening.
  • a variable displacement hydraulic pump pumped by the engine to provide hydraulic pressure, and a plurality of work devices including a boom actuator or arm actuator, a bucket actuator and a swing motor, having a swash plate control device for controlling an area.
  • the actuator is installed between the hydraulic pump and the work device actuator, and the spool switching operation to control the hydraulic pressure discharged from the hydraulic pump for the start, stop and swing driving of the work device actuator and the swing motor
  • a device control valve and a sensing amount of an operation device for driving the actuator for the work device A flow rate control unit connected to the quantity detection means, the operation amount detection means and the swash plate control device, and receiving a working device operation signal of the operation device detected by the operation amount detection means to control the discharge flow rate of the hydraulic pump;
  • the required flow rate of each actuator for the work device is determined in advance through the operation device operation signal, and then a square root is calculated by adding the square root to the sum of squares of the required flow rates to determine the discharge flow rate of the hydraulic pump. Control the swash plate control unit.
  • a flow control apparatus for a variable displacement hydraulic pump for a construction machine comprises controlling a plurality of working devices by controlling the opening area of a hydraulic pump based on the square root of the sum of squares of the required flow rates for driving the respective working device actuators.
  • the opening area of the hydraulic pump is relatively larger than the conventional one (meaning that the discharge flow volume of the hydraulic pump is relatively small), which not only reduces the pressure loss of the hydraulic pump but also improves efficiency and fuel economy. There is an advantage to improve.
  • the flow rate control device of the variable displacement hydraulic pump for construction machinery in the operation of the operation device for the combined operation and the discharge flow rate control of the hydraulic pump according to, in the same section, a relatively low flow rate compared to the conventional It is discharged, and there is an advantage that can improve the operability of the equipment by forming a relatively wide operation section of the operation device.
  • FIG. 1 is a perspective view schematically showing a conventional construction machine excavator
  • FIG. 3 is a hydraulic system configuration diagram schematically showing a hydraulic apparatus according to an embodiment of the present invention.
  • FIG. 5 is a flow chart showing the characteristics of the hydraulic pump according to the present invention.
  • the engine 10 is the engine 10,
  • a variable displacement hydraulic pump 12 having a swash plate control device 11 for controlling the opening area and pumped by the engine 10 to provide hydraulic pressure;
  • a plurality of work device actuators 14 including a boom actuator or arm actuator, a bucket actuator and a swing motor,
  • It is connected to the manipulated variable detecting means 17 and the swash plate control device 11, and receives the operating device operating signal of the operating device 16 sensed by the manipulated variable detecting means 17 to discharge the hydraulic pump 12. It comprises a; flow control controller 18 for controlling the flow rate;
  • the flow control controller 18 determines the required flow rate of each work device actuator 15 through the work device operation signal in advance, and then determines the discharge flow rate of the hydraulic pump 12. It is composed of a flow control device of a variable displacement hydraulic pump for construction machinery that controls the swash plate control device 11 by calculating the square root to the sum of the square of each required flow rate.
  • the manipulated variable detecting means 17 is composed of a pilot pressure detection sensor, and the swash plate control device 1 is composed of an electronically controlled proportional valve.
  • the hydraulic excavator (1), the upper revolving body (3) to be pivotally supported on the lower running body (2) of the crawler type and the lower running body (2) and A plurality of work devices are mounted to the upper swing body 3, and typically, the work device includes a boom 5 and an arm 6 whose proximal ends are supported by one side of the upper swing body 3 so as to be raised and lowered.
  • the work device includes a boom 5 and an arm 6 whose proximal ends are supported by one side of the upper swing body 3 so as to be raised and lowered.
  • the boom 5, the arm 6 and the bucket 7 are operated by respective actuators 14 which expand and contract by hydraulic pressure.
  • the flow control device of the variable displacement hydraulic pump for construction machinery according to an embodiment of the present invention, the operator 16, for example, operating lever or the like to drive the actuator 14 for the working device
  • the manipulated amount of the work device operation signal including the pilot pressure or the electrical signal is sensed by the manipulated variable detecting means 17.
  • the flow rate controller 18 connected to the manipulated variable detecting unit 17 and the swash plate control unit 11 receives the operating device operating signal of the manipulated unit 16 detected by the manipulated variable detecting unit 17 to receive the hydraulic pump.
  • the discharge flow rate of (12) is controlled.
  • the flow control controller 18 controls the flow control controller 18,
  • the required flow rate of each work device actuator 15 is determined in advance through the work device operation signal, and then the sum of the squares of the respective required flow rates is determined to determine the discharge flow rate of the hydraulic pump 12.
  • the swash plate control device 11 is controlled by calculating a square root at.
  • the operation device 16 is connected to the pilot pump 13, and the operation amount of the operation device 16 is detected by the pilot pressure detection sensor by the operation amount detection unit 17.
  • the discharge flow rate of the hydraulic pump 12 detects the operation amount of the operating device 16 to calculate the required flow rate for each actuator 14 and the required flow rate calculation
  • the swash plate control by outputting a control signal corresponding to the result determined in step S200 and the square root calculation step S200 to calculate the square root of the value after adding all squares of the required flow rate for each actuator 14 calculated in step S100
  • Controlling apparatus 11 is determined, including the step S300.
  • the flow rate control controller 18 does not simply control the sum of the required flow rates for each of the actuators 14 for the working apparatus during the conventional hydraulic pump discharge flow rate setting, and the manipulation amount detection means 17
  • the square root of the matched value is determined as the discharge flow rate of the hydraulic pump 12 after matching the squares of the required flow rates of the respective actuators 14 for the work device according to the work device operation signal of the operating device 16 detected by It is.
  • the flow rate control controller 18 calculates the discharge flow rate of the hydraulic pump by calculating the square root of the above-described flow rate matching relationship of the actuators for the working device, and controls the output signal of the swash plate control device 11 corresponding to the result. .
  • two working device actuators 14 for example, a boom actuator and a bucket actuator, may be used.
  • the flow rate control method according to the present invention is controlled in a section delayed from the maximum discharge flow rate of the hydraulic pump. Appeared.
  • the flow control device of a variable displacement hydraulic pump for construction machinery is a plurality of When operating the actuator 14 at the same time or when performing a complex operation has a characteristic that the relatively small pump flow rate is discharged to the opening area of the hydraulic pump compared to the prior art.
  • the flow rate control device of the variable displacement hydraulic pump for construction machinery when the operation amount of the operation device 16 during the complex operation is maintained the same, compared to the conventional relatively small flow rate in the hydraulic pump 12 In order to discharge the same flow rate as in the prior art, the control side of the operating device 16 has a characteristic that a relatively large amount of operation amount is required.
  • the flow control device of the variable displacement hydraulic pump for construction machinery provides a wider operating section to the operator than in the prior art By doing so, the operability can be kept soft and stable.
  • the above-described flow rate control apparatus for a variable displacement hydraulic pump for a construction machine according to the present invention has a relatively low flow rate in the same section in the operation of the operation apparatus and the discharge flow rate control of the hydraulic pump according to the operation for the complex operation. It is very useful for the flow control device of the variable displacement hydraulic pump for construction machinery which can discharge and also the operation section of the operating device is relatively wide, thereby improving the operability and reducing the pressure loss of the hydraulic pump.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

La présente invention porte sur un dispositif de commande de pression hydraulique d'une pompe hydraulique du type à cylindrée variable pour engin de chantier, dispositif dans lequel des sections manœuvrables de systèmes de manœuvre sont formées d'une façon large pendant que la pompe hydraulique débite un débit relativement petit comparativement à l'amplitude de manœuvre des systèmes de manœuvre respectifs dans le cas de manœuvres complexes, afin d'améliorer la perte de pression et le rapport de carburant de la pompe hydraulique. Le dispositif comprend une unité de commande du débit, qui est, de préférence, reliée à un moyen de détection de l'amplitude de manœuvre et un dispositif de commande du plateau oscillant, et qui reçoit des signaux de manœuvre du système de manœuvre d'un dispositif de commande qui sont détectés par le moyen de détection de l'amplitude de manœuvre de manière à commander le débit de refoulement de la pompe hydraulique. Dans le cas de manœuvres complexes, l'unité de commande du débit prédétermine le débit requis d'un actionneur pour les systèmes de manœuvre respectifs par l'intermédiaire des signaux de manœuvre des systèmes de manœuvre et elle extrait ensuite la racine carrée de la somme des carrés des débits requis respectifs de manière à déterminer le débit de refoulement de la pompe hydraulique, commandant de cette manière le dispositif de commande du plateau oscillant.
PCT/KR2010/005742 2010-09-09 2010-09-09 Dispositif de commande du débit pour une pompe hydraulique du type à cylindrée variable pour engin de chantier Ceased WO2012033233A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2013528094A JP5719440B2 (ja) 2010-09-09 2010-09-09 建設機械用可変容量型油圧ポンプの流量制御装置
CN201080069025.7A CN103097743B (zh) 2010-09-09 2010-09-09 用于施工设备的变量型液压泵的流量控制装置
EP10857020.1A EP2615311A1 (fr) 2010-09-09 2010-09-09 Dispositif de commande du débit pour une pompe hydraulique du type à cylindrée variable pour engin de chantier
PCT/KR2010/005742 WO2012033233A1 (fr) 2010-09-09 2010-09-09 Dispositif de commande du débit pour une pompe hydraulique du type à cylindrée variable pour engin de chantier
KR1020137004529A KR20130143552A (ko) 2010-09-09 2010-09-09 건설기계용 가변용량형 유압펌프의 유량제어장치
US13/821,452 US20130160439A1 (en) 2010-09-09 2010-09-09 Flow rate control device for variable displacement type hydraulic pump for construction equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2010/005742 WO2012033233A1 (fr) 2010-09-09 2010-09-09 Dispositif de commande du débit pour une pompe hydraulique du type à cylindrée variable pour engin de chantier

Publications (1)

Publication Number Publication Date
WO2012033233A1 true WO2012033233A1 (fr) 2012-03-15

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PCT/KR2010/005742 Ceased WO2012033233A1 (fr) 2010-09-09 2010-09-09 Dispositif de commande du débit pour une pompe hydraulique du type à cylindrée variable pour engin de chantier

Country Status (6)

Country Link
US (1) US20130160439A1 (fr)
EP (1) EP2615311A1 (fr)
JP (1) JP5719440B2 (fr)
KR (1) KR20130143552A (fr)
CN (1) CN103097743B (fr)
WO (1) WO2012033233A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2891709C (fr) 2012-11-23 2017-10-24 Volvo Construction Equipment Ab Appareil et methode de controle de fonction preferentielle d'une machine de construction
CN104919116B (zh) 2013-01-18 2017-12-19 沃尔沃建造设备有限公司 用于工程机械的控流装置和控流方法
CN107208398B (zh) * 2014-12-10 2020-04-14 沃尔沃建筑设备公司 用于补偿建筑机械的液压泵流量的方法
US9869311B2 (en) * 2015-05-19 2018-01-16 Caterpillar Inc. System for estimating a displacement of a pump
CN105240349B (zh) * 2015-09-21 2018-01-26 北京中车重工机械有限公司 一种旋挖钻机及其液压控制系统
JP2018021589A (ja) 2016-08-02 2018-02-08 キャタピラー エス エー アール エル ポンプ制御装置およびポンプ制御方法
KR102561435B1 (ko) * 2016-08-31 2023-07-31 에이치디현대인프라코어 주식회사 건설기계의 제어 시스템 및 건설기계의 제어 방법
JP6803194B2 (ja) * 2016-10-25 2020-12-23 川崎重工業株式会社 建設機械の油圧駆動システム
CN107477039B (zh) * 2017-08-14 2020-01-03 潍柴动力股份有限公司 具有流量补偿功能的液压系统及工程机械
EP3575615B1 (fr) * 2018-03-15 2022-02-16 Hitachi Construction Machinery Co., Ltd. Engin de chantier
JP7221101B2 (ja) 2019-03-20 2023-02-13 日立建機株式会社 油圧ショベル
JP7253478B2 (ja) * 2019-09-25 2023-04-06 日立建機株式会社 作業機械
JP7153627B2 (ja) * 2019-10-31 2022-10-14 日立建機株式会社 作業機械および周囲監視システム

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH06159319A (ja) * 1992-11-25 1994-06-07 Hitachi Constr Mach Co Ltd 油圧作業機のポンプ吐出流量制御装置
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CN103097743B (zh) 2016-03-02
EP2615311A1 (fr) 2013-07-17
US20130160439A1 (en) 2013-06-27

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