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    Pilot pressure control system
    2.
    发明授权
    Pilot pressure control system 有权

    公开(公告)号：US09903098B2

    公开(公告)日：2018-02-27

    申请号：US14771393

    申请日：2013-03-06

    申请人： VOLVO CONSTRUCTION EQUIPMENT AB

    发明人： Bo Vigholm

    IPC分类号： F15B13/043 ,  E02F9/22 ,  F15B20/00 ,  B62D5/09 ,  F15B21/08 ,  E02F9/08

    CPC分类号： E02F9/225 ,  B62D5/091 ,  E02F9/0841 ,  E02F9/226 ,  E02F9/2267 ,  E02F9/2285 ,  E02F9/2296 ,  F15B13/0433 ,  F15B20/008 ,  F15B21/087 ,  F15B2211/20546 ,  F15B2211/355 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7128 ,  F15B2211/8636 ,  F15B2211/8752

    摘要： A pilot pressure control system for controlling a pilot signal pressure at a pilot inlet of a control valve includes a pilot outlet adapted to be connected to the pilot inlet. The pilot pressure control assembly further includes a first pilot valve assembly and a second pilot valve assembly. Each one of the first and second pilot valve assemblies are individually controllable so as to selectively provide a first fluid flow direction from a pressure line to the pilot outlet and a second fluid flow direction from the pilot outlet to a drain line. At least the first pilot valve assembly is adapted to assume a maximum pressure supply condition so as to supply a first pilot valve assembly maximum pressure to the pilot outlet. At least the second pilot valve assembly is adapted to provide a pressure drop from the pilot outlet to the drain line via the second pilot valve assembly. The pilot pressure control system is configured such that, when the pilot pressure control system is connected to the pressure and drain lines and when the first pilot valve assembly is controlled so as to assume the maximum pressure supply condition and the second pilot valve assembly provides a fluid flow in the second fluid direction with a minimum pressure drop, the pressure at the pilot outlet is equal to or above 20 of the first pilot valve assembly maximum pressure (Pmax).

    CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE
    5.
    发明申请
    CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE 审中-公开
    混合施工机械控制系统

    公开(公告)号：US20160215481A1

    公开(公告)日：2016-07-28

    申请号：US14917723

    申请日：2014-09-26

    申请人： KYB CORPORATION

    发明人： Haruhiko KAWASAKI ,  Masahiro EGAWA

    IPC分类号： E02F9/22 ,  F15B21/14 ,  H02K7/18 ,  F15B20/00

    CPC分类号： E02F9/2217 ,  E02F9/2075 ,  E02F9/2203 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B20/004 ,  F15B21/14 ,  F15B2211/20515 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/3058 ,  F15B2211/30595 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/45 ,  F15B2211/67 ,  F15B2211/7053 ,  F15B2211/7142 ,  F15B2211/761 ,  F15B2211/8752 ,  F15B2211/88 ,  H02K7/1823

    摘要： A control system for a hybrid construction machine includes first and second main pumps for supplying working oil, a boom cylinder extending by supply of the working oil to a piston-side chamber and raising a boom and contracting by discharge of the working oil from the piston-side chamber and lowering the boom, a regenerative spool valve controlled by a pressure of pilot pressure oil and adjusting a flow rate of the working oil discharged from the piston-side chamber, a regenerative motor for regeneration rotating by the working oil discharged from the piston-side chamber, a rotary electric machine connected to the regenerative motor, and a failsafe switching valve switching with a pressure of a regenerative passage between the regenerative control spool valve and the regenerative motor as a pilot pressure and lowering the pressure of the pilot pressure oil to the regenerative control spool valve so that a flow rate of the working oil discharged from the piston-side chamber is narrowed if the pressure of the regenerative passage is less than a set pressure.

    摘要翻译： 一种用于混合动力施工机械的控制系统，包括用于供给工作油的第一和第二主泵，通过将工作油供应到活塞侧室而延伸的起重臂缸，并且通过从活塞排出工作油来升高起重臂和收缩 并且降低动臂，由先导压力油的压力控制的再生滑阀，并且调节从活塞侧室排出的工作油的流量，再生电动机，其由通过从活塞侧室排出的工作油旋转 活塞侧室，与再生电动机连接的旋转电机，以及在再生控制滑阀和再生电动机之间的再生通路的压力切换的故障保护切换阀作为先导压力，并且降低先导压力的压力 油到再生控制滑阀，使得从活塞侧室排出的工作油的流量变窄 d，再生通道的压力小于设定压力。

    CUSHION VALVE
    6.
    发明申请
    CUSHION VALVE 审中-公开
    垫圈阀

    公开(公告)号：US20150144212A1

    公开(公告)日：2015-05-28

    申请号：US14406787

    申请日：2014-03-07

    申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

    发明人： Masahiro Matsuo ,  Ryo Kawakami

    IPC分类号： F15B13/042 ,  F15B13/04 ,  F16K11/10 ,  F16K47/04

    CPC分类号： F15B13/0422 ,  F15B13/0402 ,  F15B13/0407 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/8606 ,  F16K11/10 ,  F16K47/023 ,  F16K47/04 ,  Y10T137/87193

    摘要： A cushion valve includes a housing having a pair of primary chambers and a pair of secondary chambers. A first spool and a pair of second spools are arranged in the housing. Biasing members are respectively arranged between the first spool and the second spool and between the first spool and the second spool. A first internal passage communicating with a tank port is formed at the first spool. Each of the second spools includes a land portion configured to open or close an opening formed between the primary chamber and the corresponding secondary chamber. A second internal passage including a restrictor is formed at each of the second spools. When one of the second spools moves toward the first spool, the first internal passage communicates with the secondary chamber located at the other second spool side.

    摘要翻译： 缓冲阀包括具有一对主室和一对次室的壳体。 第一线轴和一对第二线轴布置在壳体中。 偏置构件分别设置在第一卷轴和第二卷轴之间以及第一卷轴和第二卷轴之间。 与罐口连通的第一内部通道形成在第一卷轴上。 每个第二线轴包括被构造成打开或关闭形成在主腔室和相应的辅助腔室之间的开口的接合部分。 在每个第二卷轴上形成包括节流器的第二内部通道。 当第二卷轴中的一个向第一卷轴移动时，第一内部通道与位于另一个第二卷轴侧的副室连通。

    PILOT PUMP SOURCED PEAK SHAVING FOR HYBRID HYDRAULIC CIRCUITS
    8.
    发明申请
    PILOT PUMP SOURCED PEAK SHAVING FOR HYBRID HYDRAULIC CIRCUITS 审中-公开
    混合泵液压泵的泵浦峰值冲击

    公开(公告)号：US20140223893A1

    公开(公告)日：2014-08-14

    申请号：US13764024

    申请日：2013-02-11

    申请人： CATERPILLAR INC.

    发明人： Jeremy Todd Peterson ,  Jeffrey L. Kuehn

    IPC分类号： F15B1/02

    CPC分类号： F15B1/024 ,  B60W20/00 ,  E02F9/123 ,  E02F9/2066 ,  E02F9/207 ,  E02F9/2217 ,  E02F9/2285 ,  F15B1/033 ,  F15B21/14 ,  F15B2211/212 ,  F15B2211/4053 ,  F15B2211/625 ,  F15B2211/6316 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7058 ,  Y10T137/0396 ,  Y10T137/85986

    摘要： A system includes a pilot pump with an output that may be directed to a pilot circuit by way of a selector valve. The selector valve is shifted between a first position providing communication between the pump and the pilot circuit to a second position providing communication between the pilot pump and the hybrid circuit when pressure in the pilot circuit reaches a predetermined level. That pressure is used to hydraulically shift the selector valve to redirect flow from the pilot pump to the hybrid circuit. Both the pilot circuit and the hybrid circuit include accumulators for storing pressurized hydraulic fluid. The fluid stored in the pilot circuit is used for pilot functionality while the fluid stored in the hybrid circuit is used to power any one or more of a variety of power consuming components.

    摘要翻译： 一种系统包括具有可通过选择阀引导到先导回路的输出的先导泵。 当在先导电路中的压力达到预定水平时，选择阀在提供泵和导向电路之间的通信的第一位置之间移动到提供先导泵和混合电路之间的连通的第二位置。 该压力用于液压移动选择阀以将流体从引导泵转向混合回路。 导频电路和混合电路都包括用于存储加压液压流体的蓄电池。 存储在先导电路中的流体用于先导功能，而存储在混合电路中的流体用于为各种功耗组件中的任何一个或多个供电。

    HYDRAULIC CIRCUIT OF CONSTRUCTION MACHINE
    10.
    发明申请
    HYDRAULIC CIRCUIT OF CONSTRUCTION MACHINE 有权
    建筑机械液压回路

    公开(公告)号：US20090205723A1

    公开(公告)日：2009-08-20

    申请号：US12339813

    申请日：2008-12-19

    申请人： Yoshimi SAOTOME ,  Norifumi Shiraga

    发明人： Yoshimi SAOTOME ,  Norifumi Shiraga

    IPC分类号： F16K31/12

    CPC分类号： F15B13/0407 ,  F15B13/042 ,  F15B13/0422 ,  F15B2211/30525 ,  F15B2211/329 ,  F15B2211/67 ,  F15B2211/8606 ,  F15B2211/88 ,  Y10T137/7758

    摘要： A throttle path for returning a part of pilot oil to a tank is formed by a tank path provided in a valve block of a control valve and a notch provided in a spool thereof. The above path is opened within a section from a vicinity of a stroke where a hydraulic actuator starts moving to right before a stroke end among a spool stroke of the control valve. An opening area of the above path is slowly reduced in accordance with an increase in the stroke at a final phase of the section.

    摘要翻译： 用于使一部分先导油返回到罐的节气门路径由设置在控制阀的阀块中的槽路和设置在其阀芯中的槽口形成。 上述路径在从控制阀的滑阀行程中的行程结束前的液压致动器开始向右移动的行程附近的部分内打开。 根据截面的最后阶段的行程的增加，上述路径的开口面积缓慢减小。