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    • 5. 发明申请
    • A METHOD FOR CONTROLLING LOWERING OF AN IMPLEMENT OF A WORKING MACHINE
    • 一种控制工作机械落地的方法
    • WO2013095208A1
    • 2013-06-27
    • PCT/SE2011/000242
    • 2011-12-22
    • VOLVO CONSTRUCTION EQUIPMENT ABVIGHOLM, BoEKVALL, AndreasHEYBROEK, Kim
    • VIGHOLM, BoEKVALL, AndreasHEYBROEK, Kim
    • E02F9/22F15B11/024F15B21/14
    • F15B21/02E02F3/432E02F9/2095E02F9/2203E02F9/2217E02F9/2296F15B15/10F15B21/14F15B2211/20553F15B2211/3057F15B2211/3058F15B2211/611F15B2211/6306F15B2211/6313F15B2211/6654F15B2211/7053F15B2211/7058F15B2211/88Y10T137/0396
    • The invention relates to a method for controlling lowering of an implement (3) of a working machine. The working machine has a hydraulic system (10) comprising a hydraulic cylinder (11) for moving the implement and a first control valve (12) for controlling the flow of hydraulic fluid from the piston side (13) of the hydraulic cylinder, and a recovery unit (14) connected to the control valve for recovering energy by receiving a return flow from the piston side of the hydraulic cylinder. The piston side (13) of the hydraulic cylinder and the control valve (12) are connected to each other, and the piston rod side (15) of the hydraulic cylinder is connected to the control valve (12) and to the recovery unit (14) in a point (16) between the control valve and the recovery unit. The method comprises the steps of identifying a requested lowering speed of the implement (3), and identifying a desired pressure at the piston side (13) of the hydraulic cylinder (11) and controlling the recovery unit (14) to provide a counter pressure resulting in the desired pressure at the piston side of the hydraulic cylinder, and enabling fluid communication between the piston side (13) of the hydraulic cylinder and the recovery unit (14), and between the piston side (13) of the hydraulic cylinder and the piston rod side (15) of the hydraulic cylinder (11), via the control valve (12), and controlling the control valve (12) in such a way that the flow through the control valve corresponds to the requested lowering speed of the implement (3).
    • 本发明涉及一种用于控制作业机器的工具(3)的降低的方法。 工作机具有液压系统(10),液压系统(10)包括用于移动工具的液压缸(11)和用于控制来自液压缸的活塞侧(13)的液压流体流动的第一控制阀(12) 回收单元(14),其连接到控制阀,用于通过接收来自液压缸的活塞侧的返回流来回收能量。 液压缸的活塞侧(13)和控制阀(12)彼此连接,液压缸的活塞杆侧(15)连接到控制阀(12)和回收单元( 在控制阀和回收单元之间的点(16)中。 该方法包括以下步骤:识别工具(3)的所请求的降低速度,以及识别在液压缸(11)的活塞侧(13)处的期望压力,并控制回收单元(14)提供反压力 导致液压缸的活塞侧所需的压力,并且使液压缸的活塞侧(13)和回收单元(14)之间以及液压缸的活塞侧(13)与液压缸的活塞侧 液压缸(11)的活塞杆侧(15)经由控制阀(12),并以这样的方式控制控制阀(12),使得通过控制阀的流量对应于所要求的下降速度 实施(3)。