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    DEVICE AND METHOD FOR CONTROLLING WORK MACHINE
    1.
    发明申请
    DEVICE AND METHOD FOR CONTROLLING WORK MACHINE 审中-公开

    公开(公告)号：US20180135278A1

    公开(公告)日：2018-05-17

    申请号：US15572733

    申请日：2016-05-03

    Applicant: Caterpillar SARL

    Inventor： Yoshihiko Hata

    IPC: E02F9/22 ,  F15B21/08

    Abstract: The amount of work of a work machine (11) is estimated using fuzzy logic based on the amount of operation of control units (L1) to (L4) which operate a hydraulic swing motor (16m) and cylinders (21c) to (23c). A setting signal, which sets the rotational speed of an engine (19) based on the estimated amount of work, is set using the fuzzy logic. The rotational speed of the engine (19) can be optimized according to the operator's operation intention with the control units (L1) to (L4), and energy loss of a hydraulic system can be suppressed.

    Hydraulic Machinery
    3.
    发明申请
    Hydraulic Machinery 审中-公开
    液压机械

    公开(公告)号：US20140331660A1

    公开(公告)日：2014-11-13

    申请号：US14365555

    申请日：2012-12-14

    Applicant: Caterpillar SARL

    Inventor： Yoshihiko Hata ,  Shogo Tada

    IPC: E02F9/22

    CPC classification number: E02F9/2246 ,  E02F9/2285 ,  E02F9/2296 ,  F02D29/04 ,  F02D41/0205 ,  F02D41/021 ,  F15B1/083 ,  F15B1/24

    Abstract: The invention addresses the problem of avoiding insufficient flow being supplied to the hydraulic actuator and speed becoming insufficient during light loads in hydraulic machinery such as hydraulic shovels when the engine rotation speed is set low during normal work. The solution is to increase the discharge flow of the hydraulic pump (2) by increasing the rotation speed of the engine (1) above the target rotation speed set by the engine rotation speed-setting means (14) when the hydraulic pump (2) discharge pressure is at the light load pump discharge pressure, the hydraulic pump (2) inclination angle is at the maximum inclination angle, and the negative control signal pressure is at the signal pressure when the hydraulic actuator-operating means (7) is at full operation.

    Abstract translation: 本发明解决了当在正常工作期间发动机转速设定为低时，液压铲斗等液压机械的轻负载时，避免供给液压致动器的流量不足的速度不足的问题。 解决的办法是通过在液压泵（2）上将发动机（1）的转速提高到由发动机转速设定装置（14）设定的目标转速以上时，增加液压泵（2）的排出流量， 排出压力处于轻负荷泵排出压力时，液压泵（2）的倾斜角度处于最大倾斜角度，当液压致动器操作装置（7）处于满载状态时，负控制信号压力处于信号压力 操作。

    Hydraulic circuit and working machine
    4.
    发明授权
    Hydraulic circuit and working machine 有权

    公开(公告)号：US10415214B2

    公开(公告)日：2019-09-17

    申请号：US15568076

    申请日：2016-04-20

    Applicant: Caterpillar SARL

    Inventor： Kouji Kishida ,  Mitsuhiro Toyoda ,  Yoshihiko Hata ,  Yuya Kanenawa ,  Shuhei Orimoto ,  Nobuaki Matoba

    IPC: E02F9/22 ,  F15B15/18

    Abstract: Provided are a hydraulic circuit and a work machine capable of improving an initial motion speed of a hydraulic cylinder during a contraction of the hydraulic cylinder and securing a necessary pump flow rate while hydraulic fluid is being accumulated in an accumulator. Hydraulic oil from a head side of a second boom cylinder is regenerated in a first boom cylinder and the second boom cylinder through a second control valve of a regeneration circuit. At the same time, oil from the head side of the first boom cylinder is accumulated to a first accumulator by a pressure accumulating circuit through a first control valve. The hydraulic oil supplied under pressure from a main pump is fed to a rod side of the first boom cylinder by a boom control valve. A bleed-off valve of a bleed-off circuit communicates the first control valve to a tank at the time of initial operation of the first control valve, thereby releasing hydraulic oil from the head end of the first boom cylinder to improve an initial motion speed.

    Control device and working machine
    5.
    发明授权
    Control device and working machine 有权

    公开(公告)号：US10407874B2

    公开(公告)日：2019-09-10

    申请号：US15301824

    申请日：2015-04-17

    Applicant: Caterpillar SARL

    Inventor： Shigeo Kajita ,  Kouji Kishida ,  Yoshihiko Hata ,  Nobuaki Matoba

    IPC: E02F9/20 ,  F15B1/027 ,  E02F9/22 ,  E02F3/96 ,  F15B11/10 ,  F15B13/04

    Abstract: A control device for suppressing engine load fluctuation according to main pump circuit conditions, wherein an assist torque calculation task includes a target engine torque calculation task separating smooth torque components from main pump load torque and setting a minimum value of either smooth torque component or engine setting torque as target engine torque, and a subtractor calculating target assist torque based on a difference between the main pump load torque and the target engine torque, the assist torque calculation task controlling a capacity of an assist pump based on the target assist torque and controlling switching between an assist mode and a charge mode.

    Device and method for controlling work machine
    7.
    发明授权
    Device and method for controlling work machine 有权

    公开(公告)号：US10767345B2

    公开(公告)日：2020-09-08

    申请号：US15572733

    申请日：2016-05-03

    Applicant: Caterpillar SARL

    Inventor： Yoshihiko Hata

    IPC: E02F9/22 ,  F15B21/08 ,  E02F3/32 ,  F15B11/16

    Abstract: The amount of work of a work machine (11) is estimated using fuzzy logic based on the amount of operation of control units (L1) to (L4) which operate a hydraulic swing motor (16m) and cylinders (21c) to (23c). A setting signal, which sets the rotational speed of an engine (19) based on the estimated amount of work, is set using the fuzzy logic. The rotational speed of the engine (19) can be optimized according to the operator's operation intention with the control units (L1) to (L4), and energy loss of a hydraulic system can be suppressed.

    Hydraulic pump control system of hydraulic working machine
    8.
    发明授权
    Hydraulic pump control system of hydraulic working machine 有权

    公开(公告)号：US10563377B2

    公开(公告)日：2020-02-18

    申请号：US15754676

    申请日：2016-09-16

    Applicant: Caterpillar SARL

    Inventor： Kouji Kishida ,  Yoshihiko Hata ,  Nobuaki Matoba

    IPC: E02F9/22 ,  F15B11/16

    Abstract: A hydraulic working machine is provided that uses a variable displacement pump and open center type flow rate control valve for a controlling a hydraulic actuator, and has a negative control throttle disposed in a center bypass oil passage to generate a negative control pressure. A hydraulic pump control system performs virtual bleed-off control for reducing the bleed-off flow rate of the center bypass oil passage, and can operate the hydraulic actuator with the same performance as an open center control. The control system includes a bypass cut valve disposed upstream from the negative control throttle to reduce flow through the center bypass oil passages, and a negative control pressure output valve that outputs a virtual negative control pressure. The control system is configured to reduce the bleed-off flow rate by operating the bypass cut valve when virtual bleed-off control is performed, and to reduce the pump flow rate by the bleed-off reduction flow rate.

    Control System Of Blowing Means For Construction Machines
    9.
    发明申请
    Control System Of Blowing Means For Construction Machines 审中-公开

    公开(公告)号：US20190241060A1

    公开(公告)日：2019-08-08

    申请号：US16317212

    申请日：2017-07-10

    Applicant: Caterpillar SARL

    Inventor： Keigo Hara ,  Yoshihiko Hata

    IPC: B60K11/06 ,  F01P7/04 ,  E02F9/08 ,  E02F9/20 ,  B60K11/04

    CPC classification number: B60K11/06 ,  B60K11/04 ,  B60K2025/005 ,  E02F9/0866 ,  E02F9/2095 ,  F01P7/048 ,  F01P2025/30

    Abstract: To provide a control system of blowing means for construction machines that enables to prevent the loss of battery charging amount even if an engine rotation speed is low and an alternator generates less electricity. A control system 2 of blowing means for construction machines comprises a heat exchanging means, a blowing means for blowing air to the heat exchanging means, an electric driving means for driving the blowing means, a temperature detecting means for detecting temperature of fluids running through the heat exchanging means, an alternator 4 generating electricity by being driven by an engine 34, and a control means for determining an upper limit rotation speed of the electric driving means based on current generated by the alternator 4 and controlling a rotation speed of the electric driving means based on temperature detected by the temperature detecting means while the rotation speed is below the upper limit rotation speed.

    HYDRAULIC PUMP CONTROL SYSTEM OF HYDRAULIC WORKING MACHINE
    10.
    发明申请
    HYDRAULIC PUMP CONTROL SYSTEM OF HYDRAULIC WORKING MACHINE 审中-公开

    公开(公告)号：US20180238027A1

    公开(公告)日：2018-08-23

    申请号：US15754676

    申请日：2016-09-16

    Applicant: Caterpillar SARL

    Inventor： Kouji Kishida ,  Yoshihiko Hata ,  Nobuaki Matoba

    IPC: E02F9/22 ,  F15B11/16

    Abstract: A hydraulic working machine is provided that uses a variable displacement pump and open center type flow rate control valve for a controlling a hydraulic actuator, and has a negative control throttle disposed in a center bypass oil passage to generate a negative control pressure. A hydraulic pump control system performs virtual bleed-off control for reducing the bleed-off flow rate of the center bypass oil passage, and can operate the hydraulic actuator with the same performance as an open center control. The control system includes a bypass cut valve disposed upstream from the negative control throttle to reduce flow through the center bypass oil passages, and a negative control pressure output valve that outputs a virtual negative control pressure. The control system is configured to reduce the bleed-off flow rate by operating the bypass cut valve when virtual bleed-off control is performed, and to reduce the pump flow rate by the bleed-off reduction flow rate.

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