中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

14 records (took 0.014 seconds)

    PRESSURE OVERSHOOTING PREVENTION SYSTEM FOR ELECTRONIC HYDRAULIC PUMP IN HYDRAULIC SYSTEM
    3.
    发明申请
    PRESSURE OVERSHOOTING PREVENTION SYSTEM FOR ELECTRONIC HYDRAULIC PUMP IN HYDRAULIC SYSTEM 审中-公开
    液压系统电子液压泵压力防护系统

    公开(公告)号：US20150017029A1

    公开(公告)日：2015-01-15

    申请号：US14368430

    申请日：2012-12-24

    Applicant: DOOSAN INFRACORE CO., LTD.

    Inventor： Woo Yong Jung

    IPC: F04B49/03

    CPC classification number: F04B49/03 ,  F04B49/08 ,  F04B49/10 ,  F15B11/0423 ,  F15B2211/20546 ,  F15B2211/20553 ,  F15B2211/6333 ,  F15B2211/6652 ,  F15B2211/6654

    Abstract: The present disclosure relates to a pressure overshooting prevention system for an electronic hydraulic pump in a hydraulic system, in which a flow rate command is added (+), a discharge flow rate is subtracted (−), a displacement flow rate (Delta Q) is calculated, a first pressure command corresponding to the displacement flow rate (Delta Q) is generated, a working fluid pressure value corresponding to the discharge flow rate is generated, a limit pressure command is generated to limit an increasing gradient of the working fluid pressure value, a stall is determined based on a first rate of change of the flow rate command, and a second rate of change of the discharge flow rate, and the limit pressure command is set to a second pressure command when the stall is determined, and a small value of the first pressure command and the second pressure command is selected as a final pressure command so as to control an electronic proportional control valve, thereby reducing overshooting of the electronic hydraulic pump.

    Abstract translation: 本公开涉及一种液压系统中的电子液压泵的压力过冲预防系统，其中添加流量指令（+），减去排出流量（ - ），排量流量（ΔQ） ，产生与排量流量（ΔQ）对应的第一压力指令，产生与排出流量对应的工作流体压力值，产生极限压力指令，以限制工作流体压力的增加梯度 值，基于流量指令的第一变化率和排出流量的第二变化率来确定失速，并且当确定停止时将极限压力指令设定为第二压力指令;以及 选择第一压力指令和第二压力指令的小值作为最终压力指令，以便控制电子比例控制阀，从而减少t的过冲 他电子液压泵。

    Construction machinery and method of controlling construction machinery
    6.
    发明授权
    Construction machinery and method of controlling construction machinery 有权

    公开(公告)号：US10907321B2

    公开(公告)日：2021-02-02

    申请号：US15745335

    申请日：2016-07-15

    Applicant: DOOSAN INFRACORE CO., LTD

    Inventor： Young Shik Cho ,  Woo Yong Jung

    IPC: E02F9/22 ,  E02F9/20 ,  F15B11/17

    Abstract: Disclosed are a construction machine and a method of controlling a construction machine. The construction machine includes: a first pump and a second pump; an engine which provides available torque to the first pump and the second pump; a first joystick and a second joystick which control actuators operated by a working fluid discharged from the first pump and the second pump; a joystick operation amount acquiring unit which acquires operation amounts of the first joystick and the second joystick; and a control unit which adjusts a torque distribution ratio with respect to the first pump and the second pump in accordance with the operation amounts of the first joystick and the second joystick when a sum of required torque of the first pump and required torque of the second pump is higher than the available torque.

    APPARATUS AND METHOD FOR CONTROLLING OIL HYDRAULIC PUMP FOR EXCAVATOR
    8.
    发明申请
    APPARATUS AND METHOD FOR CONTROLLING OIL HYDRAULIC PUMP FOR EXCAVATOR 有权
    用于控制挖掘机油压泵的设备和方法

    公开(公告)号：US20150376871A1

    公开(公告)日：2015-12-31

    申请号：US14766181

    申请日：2014-02-06

    Applicant: DOOSAN INFRACORE CO., LTD.

    Inventor： Min Ha Ahn ,  Woo Yong Jung ,  Dal Sik Jang ,  Hyeon Sik Ahn ,  Kwang Ho Lim

    IPC: E02F9/22

    CPC classification number: E02F9/2242 ,  E02F9/2228 ,  E02F9/2267 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/17 ,  F15B2211/20576 ,  F15B2211/265 ,  F15B2211/71 ,  F15B2211/78

    Abstract: An exemplary embodiment of the present specification relates to an apparatus for controlling a hydraulic pump for an excavator with respect to a change of an operation mode, the apparatus including: an operating unit configured to generate an operation signal according to an operation of an operator, and including a joystick or a pedal; an oil flow supplying unit configured to supply oil to actuators, in order to drive a plurality of actuators corresponding to the operation signal, and including a plurality of pumps and a plurality of logic valves; and a control unit configured to control the oil flow supplying unit by using a priority algorithm for each operation considering a use frequency and a load of the actuator with respect to a change of a predetermined operation mode according to the operation signal.

    Abstract translation: 本说明书的一个示例性实施例涉及一种用于相对于操作模式的改变来控制用于挖掘机的液压泵的装置，该装置包括：操作单元，被配置为根据操作者的操作生成操作信号， 并包括操纵杆或踏板; 油流供给单元，其构造成向致动器供给油，以驱动对应于所述操作信号的多个致动器，并且包括多个泵和多个逻辑阀; 以及控制单元，其被配置为根据操作信号，考虑到致动器的使用频率和负载相对于预定操作模式的改变而针对每个操作使用优先级算法来控制油流供给单元。

    Hydraulic system of construction machinery and method of controlling hydraulic system
    10.
    发明授权
    Hydraulic system of construction machinery and method of controlling hydraulic system 有权

    公开(公告)号：US10273660B2

    公开(公告)日：2019-04-30

    申请号：US15108312

    申请日：2014-12-24

    Applicant: Doosan Infracore Co., Ltd.

    Inventor： Seung Bum You ,  Woo Yong Jung

    IPC: E02F9/22 ,  F15B11/17 ,  F15B13/06

    Abstract: The present disclosure relates to a hydraulic system of construction machinery and a method of controlling the hydraulic system. The hydraulic system of construction machinery and the method of controlling the hydraulic system according to the present disclosure assign a weighted value for each operation, preliminarily distribute a (available torque that can be used) value that an engine can provide, through torque weighted values for each operation, and calculate surplus torque and deficient torque by comparing a preliminary distributable torque value to required torque. The surplus torque is provided for an operation in which torque is deemed to be deficient. Thus, the hydraulic system of construction machinery and the method of controlling the hydraulic system according to the present disclosure can sufficiently use available torque that can be used so that an operator can achieve a desired level of performance during the operation.

Patent Agency Ranking