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    WORK VEHICLE AND METHOD FOR CONTROLLING WORK VEHICLE
    1.
    发明公开
    WORK VEHICLE AND METHOD FOR CONTROLLING WORK VEHICLE 审中-公开
    工作车辆和控制工作车辆的方法

    公开(公告)号：EP2975303A1

    公开(公告)日：2016-01-20

    申请号：EP14870740.9

    申请日：2014-11-25

    申请人： Komatsu Ltd.

    发明人： MONDEN, Hiroshi ,  NOHARA, Tatsuro ,  MIYAZAKI, Shogo

    IPC分类号： F16H61/10 ,  F16H3/66 ,  F16H3/72

    CPC分类号： B60W20/20 ,  B60K6/365 ,  B60K6/38 ,  B60K6/387 ,  B60K6/445 ,  B60K6/50 ,  B60K2006/381 ,  B60W10/105 ,  E02F9/2079 ,  E02F9/2292 ,  E02F9/2296 ,  F16H3/66 ,  F16H3/725 ,  F16H3/728 ,  F16H61/10 ,  F16H61/66 ,  F16H2037/104 ,  F16H2200/2007 ,  F16H2200/2035 ,  Y02T10/6239 ,  Y10S903/93

    摘要： A power transmission includes first and second clutches for switching a transmission path for a driving force. A work vehicle includes a clutch controlling unit. As long as a speed ratio parameter transitions within a predetermined first range including a mode switching threshold after the speed ratio parameter reaches the mode switching threshold and then the transmission path is switched from a first mode to a second mode, the clutch controlling unit is configured to output a clutch command signal for disengaging the first clutch and output a clutch command signal for engaging the second clutch so as to keep setting the transmission path in the second mode even when the speed ratio parameter again reaches the mode switching threshold.

    摘要翻译： 动力传递装置包括用于切换驱动力的传递路径的第一和第二离合器。 作业车辆包括离合器控制单元。 只要在速比参数达到模式切换阈值并且然后传输路径从第一模式切换到第二模式之后，速度比参数在包括模式切换阈值的预定第一范围内转变，离合器控制单元被配置 即使在速度比参数再次达到模式切换阈值时，输出用于使第一离合器分离的离合器指令信号，并输出用于使第二离合器接合的离合器指令信号，以保持传动路径处于第二模式。

    WORK VEHICLE AND CONTROL METHOD FOR WORK VEHICLE
    2.
    发明公开
    WORK VEHICLE AND CONTROL METHOD FOR WORK VEHICLE 审中-公开

    公开(公告)号：EP3943781A1

    公开(公告)日：2022-01-26

    申请号：EP20825772.5

    申请日：2020-06-12

    申请人： Komatsu Ltd.

    发明人： MIYAZAKI, Shogo ,  TAKENO, Akira

    IPC分类号： F16H47/04

    摘要： A work vehicle includes: a power transmission device that includes a hydraulic transmission mechanism including a first hydraulic pump motor and a second hydraulic pump motor and transmitting power input to an input shaft to an output shaft via a clutch mechanism; and a control device. The control device includes: a clutch control unit that outputs a clutch command for engaging a specified clutch among a plurality of clutches of the clutch mechanism based on a speed ratio indicating a ratio between a rotation speed of the input shaft and a rotation speed of the output shaft; a storage unit that stores correlation data indicating a relationship between the speed ratio and a capacity of the first hydraulic pump motor and a capacity of the second hydraulic pump motor; and a power control unit that outputs a capacity command for changing at least one of the capacity of the first hydraulic pump motor or the capacity of the second hydraulic pump motor based on the speed ratio and the correlation data. The correlation data is set so that both the capacity of the first hydraulic pump motor and the capacity of the second hydraulic pump motor are changed with a change in the speed ratio in a predetermined speed ratio range between a first speed ratio and a second speed ratio higher than the first speed ratio.

    WORK MACHINE CALIBRATION METHOD, WORK MACHINE CONTROLLER, AND WORK MACHINE
    3.
    发明公开
    WORK MACHINE CALIBRATION METHOD, WORK MACHINE CONTROLLER, AND WORK MACHINE 审中-公开

    公开(公告)号：EP3907333A1

    公开(公告)日：2021-11-10

    申请号：EP20782556.3

    申请日：2020-03-18

    申请人： Komatsu Ltd.

    发明人： YAMAWAKI, Shota ,  MIYAZAKI, Shogo

    IPC分类号： E02F3/43

    摘要： The method for calibrating the wheel loader (1) includes steps (S12, S14), steps (S15), and steps (S16). In steps (S12, S14) detection voltages (V1', V2') for detecting the angle of the bell crank (18) with respect to the boom (14) in the predetermined posture of the boom (14) and bucket posture which are specified are output. In step (S15) the detection voltage (V1', V2') is converted as the bell crank angle (θ1', θ2') of the bell crank (18) with respect to the boom (14) based on the bell crank angle conversion table (T1). In step (S16) the conversion value is calibrated based on the relationship between the bell crank angle (θ1', θ2') and the bell crank angle (θ1, θ2) in the specified bucket posture.

    WORK MACHINE AND WORK MACHINE CONTROL METHOD
    7.
    发明公开
    WORK MACHINE AND WORK MACHINE CONTROL METHOD 审中-公开

    公开(公告)号：EP3907334A1

    公开(公告)日：2021-11-10

    申请号：EP20782694.2

    申请日：2020-03-18

    申请人： Komatsu Ltd.

    发明人： YAMAWAKI, Shota ,  MIYAZAKI, Shogo

    IPC分类号： E02F3/43 ,  E02F9/22

    摘要： The wheel loader (1) includes a boom (14), a bucket (15), a bucket cylinder (17), a bell crank (18), and a control device (27). The bucket (15) is configured to drive with respect to the boom (14). The bell crank (18) is attached to the boom (14) and is configured to transmit driving force of the bucket cylinder (17) to the bucket (15). The control device (27) is configured to control the bucket cylinder (17) based on an angle of the bell crank (18) with respect to the boom (14).

    WORK VEHICLE, AND CONTROL DEVICE AND CONTROL METHOD FOR WORK VEHICLE
    8.
    发明公开
    WORK VEHICLE, AND CONTROL DEVICE AND CONTROL METHOD FOR WORK VEHICLE 审中-公开

    公开(公告)号：EP3858692A1

    公开(公告)日：2021-08-04

    申请号：EP19886242.7

    申请日：2019-11-12

    申请人： Komatsu Ltd.

    发明人： YAMADA, Kenichi ,  MIYAZAKI, Shogo

    IPC分类号： B60W10/30 ,  B60W10/04 ,  B60W10/06 ,  B60W10/103 ,  F02D29/00 ,  F16H59/16 ,  F16H59/18 ,  F16H59/40 ,  F16H59/42 ,  F16H61/66 ,  F16H63/50

    摘要： A required output torque determination unit determines a required output torque of a power transmission device based on an operation amount of an operation device and a traveling speed of a work vehicle. A traveling load estimation unit estimates a traveling load torque related to a traveling load on the work vehicle based on a torque of a drive source, a rotation speed ratio of the power transmission device, and a rotation speed of an output shaft. A required output torque correction unit corrects the required output torque such that the required output torque is included in an allowable output torque range including an estimated traveling load torque. A drive source control unit outputs a control signal for the drive source based on a corrected required output torque.