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    • 42. 发明申请
    • A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM OF A WORKING MACHINE
    • 一种控制工作机械液压系统的方法
    • WO2011068441A1
    • 2011-06-09
    • PCT/SE2009/000505
    • 2009-12-02
    • VOLVO CONSTRUCTION EQUIPMENT ABVIGHOLM, BoEKVALL, AndreasHEYBROEK, Kim
    • VIGHOLM, BoEKVALL, AndreasHEYBROEK, Kim
    • F15B11/17B62D5/07E02F9/22F15B21/08F15B11/16
    • B62D5/075E02F9/2235E02F9/2242E02F9/225E02F9/2292E02F9/2296F15B11/162F15B2211/20523F15B2211/20546F15B2211/20576F15B2211/2654F15B2211/2656F15B2211/4053
    • The invention relates to a method for controlling a hydraulic system (20) of a working machine, which hydraulic system comprises a first hydraulic machine (21) for providing hydraulic fluid to a first actuator (22) of the working machine, and a second hydraulic machine (23) for providing hydraulic fluid to a second actuator (24) of the working machine and for providing hydraulic fluid to the first actuator (22). The method comprises the step of using a first control mode, and in the first control mode allowing a flow of hydraulic fluid from the second hydraulic machine (23) to the second actuator (24), wherein the pump pressure of the second hydraulic machine (23) is selected based on the load pressure of the second actuator (24) independently of the load pressure of the first actuator (22). The method further comprises the step of using a second control mode provided that the requested flow to the first actuator (22) exceeds a predetermined threshold value, and in the second control mode allowing a flow of hydraulic fluid from the second hydraulic machine (23) to the first actuator (22), wherein the pump pressure of the second hydraulic machine (23) is selected based on the highest value of the load pressure of the second actuator (24) and the load pressure of the first actuator (22).
    • 本发明涉及一种用于控制作业机械的液压系统(20)的方法,该液压系统包括用于向作业机械的第一致动器(22)提供液压流体的第一液压机(21)和第二液压 机器(23),用于向工作机器的第二致动器(24)提供液压流体,并用于向第一致动器(22)提供液压流体。 该方法包括使用第一控制模式的步骤,并且在第一控制模式中允许从第二液压机(23)到第二致动器(24)的液压流体流动,其中第二液压机器 23)基于第二致动器(24)的负载压力而独立于第一致动器(22)的负载压力来选择。 该方法还包括使第二控制模式的步骤,只要所请求的流向第一致动器(22)超过预定阈值,并且在第二控制模式允许来自第二液压机(23)的液压流体流动, 到第一致动器(22),其中基于第二致动器(24)的负载压力的最大值和第一致动器(22)的负载压力来选择第二液压机械(23)的泵压力。
    • 44. 发明申请
    • SYSTEM, WORKING MACHINE COMPRISING THE SYSTEM, AND METHOD OF SPRINGING AN IMPLEMENT OF A WORKING MACHINE DURING TRANSPORT
    • 系统,包括系统的工作机,以及运输过程中工作机械的实施方法
    • WO2009067052A1
    • 2009-05-28
    • PCT/SE2007/001030
    • 2007-11-21
    • VOLVO CONSTRUCTION EQUIPMENT ABVIGHOLM, BoEKVALL, Andreas
    • VIGHOLM, BoEKVALL, Andreas
    • E02F9/22
    • E02F9/2217E02F9/2207E02F9/2296E02F9/265F15B2211/30565F15B2211/3144F15B2211/5059F15B2211/625F15B2211/6309F15B2211/6313F15B2211/8616
    • The invention relates to a system (201) for a working machine (101), wherein the system is adapted for springing the movement of a load during transport, wherein the system comprises at least one hydraulic cylinder (108, 109) for operating the load, an accumulator (271), and a valve (273) adapted to control a flow communication between the hydraulic cylinder (108, 109) and the accumulator. The system comprises a first control valve (207) arranged on a conduit connecting to the piston side of the hydraulic cylinder (108, 109), a second control valve (209) arranged on a conduit connecting to the piston rod side of the hydraulic cylinder (108, 109), a first pressure sensor (229) for detecting a load pressure of the hydraulic cylinder (108, 109), a second pressure sensor (275) for detecting a charge pressure of the accumulator, and a control unit (213) adapted to receive signals with information about the pressures detected by the pressure sensors (229, 275) and to generate control signals corresponding to the detected pressures for controlling the springing function.
    • 本发明涉及一种用于工作机器(101)的系统(201),其中系统适于在运输过程中弹起负载的运动,其中系统包括至少一个用于操作负载的液压缸(108,109) ,蓄能器(271)和适于控制液压缸(108,109)和蓄能器之间的流动连通的阀(273)。 该系统包括布置在连接到液压缸(108,109)的活塞侧的导管上的第一控制阀(207),设置在连接到液压缸的活塞杆侧的导管上的第二控制阀 (108,109),用于检测液压缸(108,109)的负载压力的第一压力传感器(229),用于检测蓄能器的充气压力的第二压力传感器(275)和控制单元(213) )适于接收具有关于由压力传感器(229,275)检测到的压力的信息的信号,并且产生与用于控制弹起功能的检测压力对应的控制信号。
    • 46. 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)。