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    • 9. 发明公开
    • WORK VEHICLE AND METHOD FOR CONTROLLING WORK VEHICLE
    • NUTZFAHRZEUG UND STEUERUNGSVERFAHRENFÜRDAS NUTZFAHRZEUG
    • EP2667058A1
    • 2013-11-27
    • EP12780628.9
    • 2012-05-09
    • Komatsu, Ltd.
    • SHIRAO, Atsushi
    • F16H61/42
    • E02F9/2246B60K28/165B60W10/06B60W10/103B60W30/18172B60W2510/0638B60W2540/10B60W2710/0644B60W2710/105F16H61/421F16H61/472
    • A work vehicle is provided with an engine, a hydraulic pump, a movement hydraulic motor, an acceleration operation member, and a control section. The hydraulic pump is driven by the engine. The movement hydraulic motor is driven by hydraulic fluid which is discharged from the hydraulic pump. The acceleration operation member is operated in order to set a target rotation speed for the engine. The control section is configured to perform traction control where the maximum traction force is reduced by limiting the displacement of the movement hydraulic motor to an upper limit displacement which is smaller than the maximum displacement. The control section increases the upper limit displacement of the movement hydraulic motor according to an increase in the operation amount of the acceleration operation member or the engine rotation speed in the traction control.
    • 工作车辆设置有发动机,液压泵,移动液压马达,加速操作构件和控制部。 液压泵由发动机驱动。 液压马达由液压泵排出的液压油驱动。 操作加速操作构件以设定发动机的目标转速。 控制部构成为通过将移动液压马达的位移限制在小于最大排量的上限位移而进行牵引力控制,在该牵引力控制中最大牵引力减小。 控制部根据加速操作构件的操作量的增加或牵引力控制中的发动机转速来增大移动式液压马达的上限位移。
    • 10. 发明公开
    • CONTROL DEVICE AND CONTROL METHOD FOR WORK VEHICLE
    • STEUERVORRICHTUNG UND STEERERVERFAHRENFÜREIN NUTZFAHRZEUG
    • EP2594828A1
    • 2013-05-22
    • EP12776653.3
    • 2012-04-17
    • Komatsu Ltd.
    • KITAO, ShinichiSHIRAO, Atsushi
    • F16H61/421E02F9/22F16H61/4035F16H61/44
    • E02F9/2221E02F9/2079E02F9/2235E02F9/2253E02F9/2289E02F9/2292E02F9/2296F16H61/4035F16H61/431F16H61/44F16H61/444Y10T477/73
    • To smoothly execute a clutch operation by reducing a shock caused by a pressure variation when a clutch is released and engaged and preventing a damage of a hydraulic circuit and the like while keeping low fuel consumption, in a one-pump/two-motors HST, a control apparatus of a working vehicle, in which a clutch is released or engaged so that power is transmitted to an output shaft of an HST motor 10a via a clutch 13 and the working vehicle travels by powers of the HST motors 10a and 10b, includes an HST controller 31 for determining a working vehicle load of the working vehicle from a throttle output amount and an engine speed of an engine 1, executing control for reducing a pump injection amount of an HST pump 4 under a restriction of an upper limit injection amount of the HST pump 4 predetermined based on the working vehicle load at the time of release shift control of the clutch 13, and executing control for increasing an pump injection amount of the HST pump 4 under a restriction of a lower limit injection amount of the HST pump 4 predetermined based on the working vehicle load at the time of engagement shift control of the clutch 13.
    • 为了顺利地执行离合器操作,通过减少离合器释放和接合时的压力变化引起的冲击,并且在保持低燃料消耗的同时防止液压回路等的损坏,在单泵/双马达HST中, 一种作业车辆的控制装置,其中离合器被释放或接合,使得动力经由离合器13传递到HST电动机10a的输出轴,并且工作车辆通过HST电动机10a和10b的动力行驶,包括 用于根据发动机1的节气门输出量和发动机转速来确定作业车辆的作业车辆负荷的HST控制器31,执行在上限喷射量的限制下减少HST泵4的泵喷射量的控制 的HST泵4基于离合器13的解除变速控制时的作业车辆负荷而预先确定,并且执行用于在限制下增加HST泵4的泵喷射量的控制 基于离合器13的接合变速控制时的作业车辆负荷而预先确定的HST泵4的下限喷射量。