WORK VEHICLE AND CONTROL METHOD FOR WORK VEHICLE
    8.
    发明申请
    WORK VEHICLE AND CONTROL METHOD FOR WORK VEHICLE 有权
    工作车辆的工作车辆和控制方法

    公开(公告)号:US20100107996A1

    公开(公告)日:2010-05-06

    申请号:US12595285

    申请日:2008-05-19

    IPC分类号: F01P7/02 F04B35/00

    摘要: A work vehicle is provided with an engine, a traveling device driven by driving force from the engine to cause the work vehicle to travel, a first hydraulic pump driven by the driving force from the engine to discharge hydraulic oil, and a cooling device having a cooling fan driven by the hydraulic oil supplied by the first hydraulic pump to cool the engine, and a control unit. The control unit performs a normal cooling control in which an upper limit fan speed is determined based on an engine speed, and a cooling suppression control in which the upper limit fan speed determined based on the engine speed is suppressed to be less than the upper limit fan speed during the normal cooling control when a predetermined operation required to increase the engine speed is performed.

    摘要翻译: 工作车辆设置有发动机,由发动机的驱动力驱动以使作业车辆行驶的行驶装置,由来自发动机的驱动力驱动以排出液压油的第一液压泵,以及具有 由第一液压泵供应的液压油驱动的冷却风扇以冷却发动机,以及控制单元。 控制单元进行基于发动机转速确定上限风扇速度的正常冷却控制,将根据发动机转速确定的上限风扇速度抑制在小于上限的冷却抑制控制 执行提高发动机转速所需的规定动作时的正常冷却控制时的风扇转速。

    Hydraulic control apparatus for work machines
    10.
    发明申请
    Hydraulic control apparatus for work machines 有权
    工作机液压控制装置

    公开(公告)号:US20050205272A1

    公开(公告)日:2005-09-22

    申请号:US11000405

    申请日:2004-12-01

    IPC分类号: E02F3/84 E02F3/85 E02F9/22

    摘要: A hydraulic control apparatus which is used in order to prevent the blade from falling over on the pitch back side during a dual tilting operation, and to operate the left and right tilting cylinders in a uniform manner even in case where there is a large difference in the load pressure between the left and right tilting cylinders. In cases where it is desired to perform a dual tilting operation, the operator moves the operating lever either leftward or rightward while pressing the dual tilting switch of the operating lever. As a result of the switch being pressed, an electrical control signal that places the flow-combining/flow-dividing switching valve or flow-combining/flow-dividing valve in the flow-dividing position is generated by the controller, and the electrical control signal is output to the flow-combining/flow-dividing switching valve so that the flow-combining/flow-dividing switching valve or flow-combining/flow-dividing valve is switched to the flow-dividing position.

    摘要翻译: 一种液压控制装置,其用于在双重倾斜操作期间防止叶片在后倾侧上落下,并且即使在差异较大的情况下也以均匀的方式操作左右倾斜滚筒 左右倾斜缸之间的负载压力。 在需要执行双倾斜操作的情况下,操作者在按压操作杆的双倾斜开关的同时向左或向右移动操作杆。 作为开关被按压的结果,通过控制器产生将流量合流/分流切换阀或流动组合/分流阀放置在分流位置的电气控制信号,并且电气控制 信号被输出到流动组合/分流切换阀,使得流动组合/分流切换阀或流动组合/分流阀切换到分流位置。