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    HYDRAULIC PUMP CONTROL DEVICE AND CONTROL METHOD FOR CONSTRUCTION MACHINERY
    3.
    发明公开
    HYDRAULIC PUMP CONTROL DEVICE AND CONTROL METHOD FOR CONSTRUCTION MACHINERY 审中-公开
    STEUERVORRICHTUNGFÜREINE HYDRAULIKPUMPE UND STEUERVERFAHRENFÜRBAUMASCHINEN

    公开(公告)号：EP2503067A2

    公开(公告)日：2012-09-26

    申请号：EP10831746.2

    申请日：2010-11-01

    申请人： Doosan Infracore Co., Ltd.

    发明人： BANG, Jae Seok ,  JUNG, Woo Yong ,  SOHN, Won Sun

    IPC分类号： E02F9/22 ,  E02F9/12 ,  F04B27/08

    CPC分类号： F04B49/08 ,  E02F9/123 ,  E02F9/2235 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  F04B1/324 ,  F04B23/06 ,  F04B49/002 ,  F04B49/065 ,  F04B2201/12051 ,  F04B2205/05 ,  F15B11/17 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/251 ,  F15B2211/265 ,  F15B2211/6309 ,  F15B2211/6652 ,  F15B2211/6653 ,  F15B2211/7058 ,  F15B2211/7135

    摘要： The present invention relates to a device for controlling a hydraulic pump of construction machinery. The device has a first pump (10) supplying working fluid through a swing control valve (31) to a swing motor (30), and a second pump (20) supplying working fluid through a work tool control valve (41) to a work tool actuator (40), and includes: a first tilting angle control unit (12) for controlling a discharge flow of the first pump (10) by controlling a tilting angle of the first pump (10) according to an input pump control signal; and a controller (60) deducting a discharge pressure (P2) of the second pump (20) from a discharge pressure (P1) of the first pump (10) to calculate a pump difference pressure (P1-P2), comparing the calculated pump difference pressure (P1-P2) to a reference difference pressure and, when the calculated pump difference pressure (P1-P2) is greater than the reference difference pressure, outputting the pump control signal to the first tilting angle control unit (12) to make the discharge pressure (P1) of the first pump (10) equal to or less than a first reference pressure that is less than or equal to a swing relief pressure.

    摘要翻译： 本发明涉及一种用于控制工程机械的液压泵的装置。 该装置具有通过摆动控制阀（31）向回转马达（30）供给工作流体的第一泵（10）和通过工作工具控制阀（41）将工作流体供给工作的第二泵（20） 工具致动器（40），并且包括：第一倾斜角度控制单元（12），用于通过根据输入泵控制信号控制第一泵（10）的倾斜角度来控制第一泵（10）的排出流量; 以及从所述第一泵（10）的排出压力（P1）减去所述第二泵（20）的排出压力（P2）的控制器（60），以计算泵差压（P1-P2），将所计算的泵 将差压（P1-P2）设定为基准差压，并且当所计算的泵差压（P1-P2）大于基准差压时，将泵控制信号输出到第一倾斜角控制单元（12） 第一泵（10）的排出压力（P1）等于或小于第一基准压力小于或等于摆动释放压力。

    SYSTEM FOR REDUCING FUEL CONSUMPTION IN EXCAVATOR
    4.
    发明公开
    SYSTEM FOR REDUCING FUEL CONSUMPTION IN EXCAVATOR 有权
    VORRICHTUNG ZUR REDUZIERUNG DES KRAFTSTOFFVERBRAUCHES EINES BAGGERS

    公开(公告)号：EP2799723A1

    公开(公告)日：2014-11-05

    申请号：EP12863060.5

    申请日：2012-12-18

    申请人： Doosan Infracore Co., Ltd.

    发明人： SOHN, Won Sun ,  YEO, Myeongku ,  KIM, Kyungtae

    IPC分类号： F15B13/02 ,  E02F9/22 ,  F15B21/08

    CPC分类号： E02F9/2232 ,  E02F9/2235 ,  E02F9/2239 ,  E02F9/2242 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/17 ,  F15B13/0401 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/3116 ,  F15B2211/88

    摘要： The present disclosure relates to a system for reducing fuel consumption in an excavator, including: first and second hydraulic pumps which are driven by power of an engine, and discharge first hydraulic oil and second hydraulic oil, respectively; a first bypass line which guides the first hydraulic oil to a drain line via a traveling control unit and a first control unit group; a second bypass line which guides the second hydraulic oil to the drain line via a second control unit group; a switch unit which allows any one of a working mode and a traveling mode to be selected; and a confluence control unit which supplies the second hydraulic oil of the second bypass line to an upstream side of the traveling control unit by selectively connecting the first bypass line and the second bypass line, in which when the traveling mode is selected, the first bypass line and the second bypass line are connected by the confluence control unit, such that the first hydraulic oil and the second hydraulic oil are merged and then supplied to the traveling control unit.

    摘要翻译： 本发明涉及一种用于降低挖掘机的燃料消耗的系统，包括：由发动机的动力驱动的第一和第二液压泵，分别排出第一液压油和第二液压油; 第一旁路管线，其经由行驶控制单元和第一控制单元组将第一液压油引导到排水管路; 第二旁通管线，其经由第二控制单元组将第二液压油引导到排出管路; 允许选择工作模式和行驶模式中的任何一个的开关单元; 以及汇流控制单元，其通过选择性地连接第一旁路管线和第二旁通管线，将第二旁通管线的第二液压油供给到行驶控制单元的上游侧，其中当选择行驶模式时，第一旁路 并且所述第二旁路管线由所述汇流控制单元连接，使得所述第一液压油和所述第二液压油被合并然后被供给到所述行驶控制单元。

    POWER CONTROL APPARATUS AND POWER CONTROL METHOD FOR CONSTRUCTION MACHINERY
    5.
    发明公开
    POWER CONTROL APPARATUS AND POWER CONTROL METHOD FOR CONSTRUCTION MACHINERY 审中-公开
    LEISTUNGSREGLER UND LEI​​STUNGSREGELUNGSVERFAHRENFÜREINE BAUMASCHINE

    公开(公告)号：EP2518222A2

    公开(公告)日：2012-10-31

    申请号：EP10839775.3

    申请日：2010-12-22

    申请人： Doosan Infracore Co., Ltd.

    发明人： SOHN, Won Sun ,  PARK, Duck Woo ,  BANG, Jae Seok

    IPC分类号： E02F9/22 ,  F02D29/04 ,  F15B11/028

    CPC分类号： E02F9/2235 ,  E02F9/2066 ,  E02F9/2246 ,  E02F9/2296 ,  F02D29/04 ,  F15B2211/20523 ,  F15B2211/26 ,  F15B2211/6309 ,  F15B2211/633

    摘要： An aspect of the present invention provides a power control apparatus of a construction machine, including: an engine (10) connected to a hydraulic pump (20) to drive the hydraulic pump (20); and a controller (60) for calculating an engine load ratio defined as a ratio of a load torque of the engine for an engine maximum torque calculated from an input engine target RPM, and calculating an engine RPM command value according to the engine load ratio such that the engine is driven at the target RPM to output the calculated engine load ratio and engine RPM command value to the engine.
    Another aspect of the present invention provides a power control apparatus of a construction machine for controlling a hydraulic pump (20) driven by an engine (10), including: a horse power regulating unit (30) for varying a swash plate angle of the hydraulic pump (20) to vary a required horse power of the hydraulic pump (20); a pressure sensor (50) for detecting a load pressure (Pd) of a working fluid discharged from the hydraulic pump (20); and a controller (60) for calculating a target pump requiring horse power from the load pressure (Pd) detected by the pressure sensor (50), and controlling a horse power regulating unit (30) such that a required horse power of the hydraulic pump (20) gradually approaches the target pump requiring horse power for a preset time (Δt).

    摘要翻译： 本发明的一个方面提供一种施工机械的动力控制装置，包括：连接到液压泵（20）以驱动液压泵（20）的发动机（10）; 以及控制器（60），用于计算根据从输入的发动机目标RPM计算的用于发动机最大扭矩的发动机的负载转矩的比率的发动机负载比，并且根据发动机的负载比计算发动机RPM指令值， 发动机在目标RPM下被驱动以将计算出的发动机负载率和发动机RPM命令值输出到发动机。 本发明的另一方面提供一种用于控制由发动机（10）驱动的液压泵（20）的施工机械的动力控制装置，包括：马力调节单元（30），用于改变液压的斜盘角度 泵（20）以改变所述液压泵（20）的所需马力; 用于检测从液压泵（20）排出的工作流体的负载压力（Pd）的压力传感器（50）。 以及控制器（60），用于从由所述压力传感器（50）检测到的负载压力（Pd）计算需要马力的目标泵，并且控制马力调节单元（30），使得所述液压泵 （20）逐渐接近需要马力的目标泵预设时间（t）。

    BOOM CYLINDER CONTROL CIRCUIT FOR CONSTRUCTION MACHINE
    7.
    发明公开
    BOOM CYLINDER CONTROL CIRCUIT FOR CONSTRUCTION MACHINE 审中-公开
    控制系统的工程机械的动臂油缸

    公开(公告)号：EP2799724A1

    公开(公告)日：2014-11-05

    申请号：EP12863793.1

    申请日：2012-12-18

    申请人： Doosan Infracore Co., Ltd.

    发明人： SOHN, Won Sun

    IPC分类号： F15B13/02 ,  E02F9/22 ,  F15B21/08

    CPC分类号： F15B13/0401 ,  E02F9/2203 ,  E02F9/226 ,  E02F9/2285 ,  F15B7/003 ,  F15B13/042

    摘要： The present invention relates to a boom cylinder control circuit for a construction machine, and includes: a boom cylinder which has an ascending-side chamber and a descending-side chamber; a boom control unit which provides a working fluid to the boom cylinder; a boom operation part which is operated to drive the boom cylinder by providing a pilot working fluid to the boom control unit; a first floating valve which allows the descending-side chamber and the ascending-side chamber to selectively communicate with or be shut off from a first drain line; a second floating valve which is additionally provided in a flow path between the descending-side chamber, which is connected with the first drain line via the first floating valve, and the first drain line, allows the descending-side chamber to communicate with the first drain line, or shut off discharge of the working fluid from the descending-side chamber to the first drain line, and allows of a reverse flow; and a floating selection operation part 10 which provides an operation signal so that the first floating valve and the second floating valve are switched in a direction in which the first floating valve and the second floating valve are communicated or shut off.