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1. 发明申请

WO2012102488A3 HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE HAVING ELECTRONIC HYDRAULIC PUMP 审中-公开
标题翻译：具有电子液压泵的施工机械液压系统
公开(公告)号：WO2012102488A3
公开(公告)日：2012-10-18
申请号：PCT/KR2011010081
申请日：2011-12-26
申请人： DOOSAN INFRACORE CO LTD , LIM HYUN SIK , JUNG WOO YONG
发明人： LIM HYUN SIK , JUNG WOO YONG
IPC分类号： F15B13/042 , E02F9/22 , F15B9/08
CPC分类号： E02F9/2292 , E02F9/2235 , E02F9/2242 , E02F9/226 , E02F9/2282 , E02F9/2296 , E02F9/268 , F15B20/002 , F15B2211/20546 , F15B2211/20576 , F15B2211/3116 , F15B2211/8752
摘要： The present invention pertains to a hydraulic system for a construction machine having an electronic hydraulic pump. More specifically, the hydraulic system temporarily drives the construction machine when the operation of the electronic control section that controls an electronic hydraulic pump is abnormal, particularly, when the electronic control section is uncontrollable because the operative amount of a joystick is not transmitted to the electronic control section. To this end, the electronic control section operates a center bypass valve so as to convert the entire system to an open type, sets neutral mode entry conditions (for example, keeping the maximum flow rate under a predetermined pressure for a predetermined time) and neutral mode departure conditions so as to recognize the neutral state of the joystick, recognizes the neutral state of the joystick using the same, and carries out the predetermined tilting angle control of a swash plate.
摘要翻译：本发明涉及一种用于具有电子液压泵的建筑机械的液压系统。更具体地说，当控制电子液压泵的电子控制部分的操作异常时，特别是当电子控制部分不可控制时，液压系统临时驱动建筑机械，因为操纵杆的操作量没有传送给电子控制部分控制部分。为此，电子控制部分操作中心旁通阀以将整个系统转换成开放型，设置空档模式进入条件（例如，将最大流量保持在预定压力下预定时间）和中性以识别操纵杆的中立状态，并利用它识别操纵杆的中立状态，并执行斜板的预定倾斜角度控制。

2. 发明申请

WO2011078543A3 APPARATUS AND METHOD FOR CONTROLLING A HYDRAULIC PUMP OF A CONSTRUCTION MACHINE 审中-公开
标题翻译：控制建筑机械液压泵的装置和方法
公开(公告)号：WO2011078543A3
公开(公告)日：2011-11-24
申请号：PCT/KR2010009140
申请日：2010-12-21
申请人： DOOSAN INFRACORE CO LTD , JUNG WOO YONG
发明人： JUNG WOO YONG
IPC分类号： E02F9/22 , E02F9/24 , F04B27/04 , F04B27/18
CPC分类号： F04B49/002 , E02F9/2235 , F04B1/324 , F04B17/05 , F04B49/065 , F04B2203/0603 , F04B2203/0605
摘要： The present invention relates to an apparatus and method for controlling a hydraulic pump of a construction machine. The disclosed apparatus of the present invention comprises: a pump control unit which controls a discharge pressure of the hydraulic pump driven by an engine, wherein the pump control unit includes a set pressure value calculation unit which calculates a set pressure value on the basis of an engine output torque estimation value or an engine RPM; and a failure- handling unit which selects either the set pressure value and a pressure instruction value in accordance with whether or not failures of a swash plate angle sensor have occurred, and outputs the selected value. According to the present invention, the set pressure value is calculated on the basis of the engine output torque estimation value, and the pump is controlled in accordance with the calculated set pressure value. Thus, it is possible to prevent a suction torque value of the pump from exceeding the maximum torque value of the engine even upon the occurrence of failures in the swash plate angle sensor, thereby preventing engine stall even upon the occurrence of failures in the swash plate angle sensor in a high-load work condition of the engine.
摘要翻译：用于控制建筑机械的液压泵的设备和方法技术领域本发明涉及用于控制建筑机械的液压泵的设备和方法所公开的本发明的装置包括：泵控制单元，其控制由发动机驱动的液压泵的排出压力，其中泵控制单元包括设定压力值计算单元，该设定压力值计算单元基于发动机输出扭矩估算值或发动机RPM; 以及故障处理单元，其根据斜盘角度传感器的故障是否已经发生来选择设定压力值和压力指令值中的任一个，并输出所选值。根据本发明，基于发动机输出转矩估计值来计算设定压力值，并且根据计算出的设定压力值来控制泵。因此，即使在斜盘角度传感器发生故障时，也可以防止泵的吸入转矩值超过发动机的最大转矩值，从而即使在斜盘发生故障时也能防止发动机失速角度传感器处于发动机的高负载工作状态。

3. 发明申请

WO2012087012A3 HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE INCLUDING EMERGENCY CONTROL UNIT FOR ELECTRIC HYDRAULIC PUMP 审中-公开
标题翻译：建筑机械的液压系统，包括用于电动液压泵的紧急控制单元
公开(公告)号：WO2012087012A3
公开(公告)日：2012-09-07
申请号：PCT/KR2011009907
申请日：2011-12-21
申请人： DOOSAN INFRACORE CO LTD , SHIN JUNG MUG , PARK DUCK WOO , JUNG WOO YONG
发明人： SHIN JUNG MUG , PARK DUCK WOO , JUNG WOO YONG
IPC分类号： F15B13/042 , E02F9/22 , F15B20/00
CPC分类号： F15B15/20 , E02F9/2235 , E02F9/2242 , E02F9/226 , E02F9/2282 , E02F9/2292 , E02F9/2296 , F15B20/00 , F15B20/002 , F15B2211/20515 , F15B2211/20523 , F15B2211/20546 , F15B2211/20576 , F15B2211/2656 , F15B2211/30595 , F15B2211/3111 , F15B2211/3116 , F15B2211/3127 , F15B2211/3144 , F15B2211/6316 , F15B2211/6333 , F15B2211/6652 , F15B2211/6658 , F15B2211/7135 , F15B2211/7142 , F15B2211/8752
摘要： The present invention relates to a hydraulic system for a construction machine which uses an electric hydraulic pump, and more particularly, to a hydraulic system including an emergency control unit for temporarily operating the construction machine when an electric unit for controlling the electric hydraulic pump fails to operate. To this end, disclosed is the hydraulic system comprising the electric hydraulic pump, the electric control unit for controlling the electric hydraulic pump, and the emergency control unit, which operates when the electric control unit fails to operate, so as to temporarily control the electric hydraulic pump in accordance with to a pre-set condition, which can effectively respond to a low load work corresponding to a predetermined pressure (P1) and to a high load work corresponding to a higher pressure (P2), by the emergency control unit operating according to different optional conditions, based on the load (low load, high load) of the working machine that is required when the electric control unit fails to operate.
摘要翻译：本发明涉及一种使用电动液压泵的建筑机械的液压系统，更具体地涉及一种液压系统，该液压系统包括应急控制单元，用于当用于控制电动液压泵的电单元未能操作。为此，公开了一种液压系统，其包括电动液压泵，用于控制电动液压泵的电动控制单元以及当电动控制单元不能操作时操作的应急控制单元，以临时控制电动所述应急控制单元根据预设条件来控制液压泵，所述预设条件能够有效地响应于与预定压力（P1）对应的低负荷工作和对应于高压（P2）的高负荷工作根据不同的可选条件，根据电控单元不能工作时所需的工作机械的负载（低负载，高负载）。

4. 发明申请

WO2011062379A3 HYDRAULIC PUMP CONTROL DEVICE AND CONTROL METHOD FOR CONSTRUCTION MACHINERY 审中-公开
标题翻译：液压泵控制装置及施工机械控制方法
公开(公告)号：WO2011062379A3
公开(公告)日：2011-11-03
申请号：PCT/KR2010007579
申请日：2010-11-01
申请人： DOOSAN INFRACORE CO LTD , BANG JAE SEOK , JUNG WOO YONG , SOHN WON SUN
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 hydraulic pump control device for construction machinery according to the present invention comprises: a first swash-plate-angle adjusting unit (12) which is for controlling hydraulic pumps in construction machinery comprising a first pump (10) for supplying operating fluid via a swivel control valve (31) to a swivel motor (30) and a second pump (20) for supplying operating fluid via a working-unit control valve (41) to a working-unit actuator (40), and which adjusts the swash plate angle of the first pump (10) and thereby adjusts the volume of fluid discharged from the first pump (10) in accordance with an input pump control signal; and a controller (60) which subtracts the discharge pressure (P2) of the second pump (20) from the discharge pressure (P1) of the first pump (10) and thereby calculates the pump pressure difference (P1-P2), and which compares the calculated pump pressure difference (P1-P2) with a reference pressure difference and, if the pump pressure difference is larger than the reference pressure difference, outputs a pump control signal to the first swash-plate-angle adjusting unit (12) such that the discharge pressure (P1) of the first pump (10) becomes either smaller than a swivel relief pressure or falls below the said first reference pressure.
摘要翻译：根据本发明的用于工程机械的液压泵控制装置包括：第一斜盘角度调节单元（12），用于控制工程机械中的液压泵，包括：第一泵（10），用于经由旋转件控制阀（31）到旋转马达（30）和第二泵（20），用于经由工作单元控制阀（41）向工作单元致动器（40）供应工作流体，并且调节斜盘角度从而根据输入的泵控制信号调节从第一泵（10）排出的流体的体积; 以及从第一泵（10）的排出压力（P1）减去第二泵（20）的排出压力（P2）的控制器（60），由此计算泵压差（P1-P2），并且将计算出的泵压差（P1-P2）与基准压力差进行比较，如果泵压差大于基准压力差，则向第一斜盘角度调整单元（12）输出泵控制信号，第一泵（10）的排出压力（P1）变得小于旋转溢流压力或者降低到所述第一参考压力以下。

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