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23 条记录 (耗时 0.032 秒)

    Hydraulic drive device
    5.
    发明授权
    Hydraulic drive device 失效
    液压驱动装置

    公开(公告)号：US06651428B2

    公开(公告)日：2003-11-25

    申请号：US10018575

    申请日：2001-12-20

    申请人： Kiwamu Takahashi ,  Takashi Kanai ,  Yasutaka Tsuruga ,  Kenichiro Nakatani ,  Junya Kawamoto

    发明人： Kiwamu Takahashi ,  Takashi Kanai ,  Yasutaka Tsuruga ,  Kenichiro Nakatani ,  Junya Kawamoto

    IPC分类号： F16D3102

    CPC分类号： E02F9/2292 ,  E02F9/2203 ,  E02F9/2232 ,  E02F9/2296 ,  F15B11/165 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/20584 ,  F15B2211/30535 ,  F15B2211/3111 ,  F15B2211/31576 ,  F15B2211/355 ,  F15B2211/6054 ,  F15B2211/6346 ,  F15B2211/6355 ,  F15B2211/71

    摘要： Differential pressures across flow control valves 6a, 6b and 6c are controlled by pressure compensating valves 7a, 7b and 7c to be held at the same value, i.e., a differential pressure &Dgr;PLS, and the differential pressure &Dgr;PLS is maintained at a target differential pressure &Dgr;PLSref by a pump displacement control unit 5. For changing the target differential pressure depending on change in revolution speed of an engine 1, a flow detecting valve 31 is disposed in a delivery line 30a, 30b of a fixed displacement hydraulic pump 30, and a differential pressure &Dgr;Pp across a variable throttle portion 31a of the flow detecting valve 31 is introduced to a setting controller 32. A selector valve 50 operable to shift between a fully closed position and a throttle position is disposed in parallel to the flow detecting valve 31 and is shifted by a control lever 51.

    摘要翻译： 流量控制阀6a，6b和6c之间的差压由压力补偿阀7a，7b和7c控制以保持在相同的值，即差压DeltaPLS，并且差压DeltaPLS保持在目标压差DeltaPLSref 通过泵排量控制单元5.为了根据发动机1的转速的变化来改变目标压差，流量检测阀31设置在固定排量液压泵30的输送管线30a，30b中，差速器 流量检测阀31的可变节流部31a的压力DeltaPp被引入到设定控制器32.可操作以在完全关闭位置和节气门位置之间移动的选择阀50与流量检测阀31并联设置，并且 由控制杆51移动。

    Engine speed control system for construction machine
    6.
    发明授权
    Engine speed control system for construction machine 失效
    发动机转速控制系统

    公开(公告)号：US06176126B1

    公开(公告)日：2001-01-23

    申请号：US09321217

    申请日：1999-05-27

    申请人： Yasutaka Tsuruga ,  Kenichiro Nakatani ,  Junya Kawamoto ,  Takashi Kanai

    发明人： Yasutaka Tsuruga ,  Kenichiro Nakatani ,  Junya Kawamoto ,  Takashi Kanai

    IPC分类号： G01M1500

    CPC分类号： E02F9/2246 ,  E02F9/2239 ,  E02F9/2285 ,  E02F9/2292

    摘要： An engine speed control system for a construction machine is arranged in association with its hydraulic circuit, which has main pumps, a communication line through which input ports of travel-controlling directional control valves are connected with each other, and a travel-controlling communication valve arranged in the communication line. The engine speed control system is provided with pilot valves arranged in a pilot line to control traveling, pilot valves arranged in a pilot line to control booms and the like, pilot valves arranged in a pilot line to control revolving, earth moving and the like, a pressure sensor for detecting pressures in the pilot lines, another pressure sensor for detecting a pressure in the pilot line, an engine controller for performing automatic idling control or its cancellation in accordance with signals from the pressure sensors, and a signal line for changing over the travel-controlling communication line into a communicating position in response to a pressure in the pilot valve.

    摘要翻译： 一种用于建筑机械的发动机转速控制系统与其具有主泵的液压回路相关联地设置有：行进控制方向控制阀的输入端口通过其彼此连接的通信线路，以及行驶控制连通阀 布置在通信线路中。 发动机转速控制系统配备有先导管路中的先导阀，用于控制配置在先导管路中的行驶式先导阀，以控制吊杆等，配置在先导管路中的先导阀，以控制回转，移动等， 用于检测先导管路中的压力的​​压力传感器，用于检测先导管路中的压力的​​另一个压力传感器，根据来自压力传感器的信号执行自动空转控制或其消除的发动机控制器，以及用于切换的信号线 行程控制通信线路响应于先导阀中的压力而进入通信位置。

    Hydraulic Drive System
    8.
    发明申请
    Hydraulic Drive System 审中-公开
    液压驱动系统

    公开(公告)号：US20090031719A1

    公开(公告)日：2009-02-05

    申请号：US11576559

    申请日：2006-05-08

    申请人： Yasutaka Tsuruga ,  Junya Kawamoto ,  Kiwamu Takahashi ,  Kenji Itou

    发明人： Yasutaka Tsuruga ,  Junya Kawamoto ,  Kiwamu Takahashi ,  Kenji Itou

    IPC分类号： F15B11/17 ,  F15B13/06

    CPC分类号： E02F9/2225 ,  E02F9/2232 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/055 ,  F15B11/165 ,  F15B2211/20523 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/652

    摘要： The hydraulic drive system comprises an engine 1, a pump unit 100, a plurality of actuators 5a, 5b and 5c, a control valve unit 4, and engine revolution speed detecting means 4f. The pump unit 100 includes a pump tilting control mechanism 8 for load sensing control, and the control valve unit 4 includes a plurality of flow control valves 15a, 15b and 15c and pressure compensation valves 10a, 10b and 10c. The engine revolution speed detecting means 4f includes a first differential pressure reducing valve 14 for outputting, as an absolute value, a pressure depending on an engine revolution speed. The output pressure of the first differential pressure reducing valve 14 is introduced, as a target load-sensing differential pressure, to the pump tilting mechanism 8 via a line 127.

    摘要翻译： 液压驱动系统包括发动机1，泵单元100，多个致动器5a，5b和5c，控制阀单元4和发动机转速检测装置4f。 泵单元100包括用于负载感测控制的泵倾转控制机构8，并且控制阀单元4包括多个流量控制阀15a，15b和15c以及压力补偿阀10a，10b和10c。 发动机转速检测装置4f包括用于输出取决于发动机转速的压力作为绝对值的第一差压减压阀14。 第一差压减压阀14的输出压力通过管线127作为目标载荷感测差压引入泵倾斜机构8。

    Hydraulic drive apparatus
    10.
    发明授权
    Hydraulic drive apparatus 失效
    液压驱动装置

    公开(公告)号：US06192681B1

    公开(公告)日：2001-02-27

    申请号：US09077552

    申请日：1998-06-01

    申请人： Yasutaka Tsuruga ,  Takashi Kanai ,  Junya Kawamoto

    发明人： Yasutaka Tsuruga ,  Takashi Kanai ,  Junya Kawamoto

    IPC分类号： F16D3102

    CPC分类号： F15B11/05 ,  E02F9/2232 ,  E02F9/2285 ,  E02F9/2296 ,  F04B49/08 ,  F04B49/24 ,  F04B2203/0605 ,  F15B2211/20523 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/50536 ,  F15B2211/635 ,  F15B2211/71

    摘要： A differential pressure &Dgr;PLS between a delivery pressure of a hydraulic pump 2 and a maximum load pressure among a plurality of actuators 3a-3c is maintained at a target differential pressure &Dgr;PLSref by pump displacement control means 5. The target differential pressure &Dgr;PLSref is modified depending on an engine rotational speed by introducing a differential pressure &Dgr;Pp across a throttle 50 disposed in a delivery line of a fixed pump 30. An unloading valve 80 has first and second auxiliary control pressure chambers 80e, 80f to which the differential pressure p across the throttle 50 is introduced, and a target differential pressure &Dgr;Pun of the unloading valve is also modified in match with change in the target differential pressure &Dgr;PLSref modified by the operation driver 32. Stable load sensing control is thereby achieved without being affected by the engine rotational speed.

    摘要翻译： 在液压泵2的输送压力和多个致动器3a-3c中的最大负载压力之间的差压DELTAPLS由泵容量控制装置5保持在目标压差DELTAPLSref。目标压差DELTAPLSref根据 通过在设置在固定泵30的输送管线中的节流阀50上引入压差DELTAPp来实现发动机转速。卸载阀80具有第一和第二辅助控制压力室80e，80f，跨过节流阀50的差压p 并且还根据由操作驱动器32修改的目标压差DELTAPLSref的变化来修改卸载阀的目标压差DELTAPun。由此实现稳定的负载感测控制而不受发动机转速的影响。