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    HYDRAULIC SYSTEM HAVING ENERGY RECOVERY
    2.
    发明申请
    HYDRAULIC SYSTEM HAVING ENERGY RECOVERY 审中-公开
    具有能源回收的液压系统

    公开(公告)号：US20150300384A1

    公开(公告)日：2015-10-22

    申请号：US14753600

    申请日：2015-06-29

    Applicant: Caterpillar Inc.

    Inventor： Jiao Zhang ,  Tonglin Shang ,  Peter Spring ,  Pengfei Ma ,  Randal Peterson ,  Rustu Cesur

    IPC: F15B21/14 ,  E02F9/22 ,  E02F9/12 ,  F15B11/024

    CPC classification number: F15B21/14 ,  E02F9/123 ,  E02F9/2217 ,  E02F9/2296 ,  F15B1/02 ,  F15B1/033 ,  F15B11/024 ,  F15B2011/0243 ,  F15B2011/0246 ,  F15B2211/205 ,  F15B2211/212 ,  F15B2211/30575 ,  F15B2211/50527 ,  F15B2211/50554 ,  F15B2211/511 ,  F15B2211/613 ,  F15B2211/625 ,  F15B2211/7058 ,  F15B2211/88

    Abstract: A hydraulic system for a machine is disclosed. The system may have a pump and a motor driven by pressurized fluid from the pump. An accumulator is configured to receive fluid discharged from the motor and to discharge fluid to the motor. The system may include a first valve to selectively communicate the higher pressure of conduits coupled between the pump and motor to the accumulator. A second valve and a third valve can be used to facilitate charging and discharging of the accumulator. The system may include a controller configured to implement a plurality of modes of operation, which each mode of operation may include a different combination of motor deceleration and motor acceleration segments during which the accumulator receives and discharges fluid, respectively. An input may be used to determine the segment of the work cycle.

    Abstract translation: 公开了一种用于机器的液压系统。 该系统可以具有来自泵的加压流体驱动的泵和马达。 蓄能器构造成接收从电动机排出的流体并将流体排放到电动机。 该系统可以包括第一阀，以选择性地将耦合在泵和马达之间的管道的较高压力传递到蓄能器。 可以使用第二阀和第三阀来促进蓄能器的充放电。 该系统可以包括被配置为实现多种操作模式的控制器，每种操作模式可以分别包括电动机减速和电动机加速段的不同组合，在此期间蓄能器分别接收和排出流体。 可以使用输入来确定工作周期的段。

    HYDRAULIC ACCUMULATOR HEALTH MONITOR
    3.
    发明申请
    HYDRAULIC ACCUMULATOR HEALTH MONITOR 审中-公开
    液压蓄能器健康监护仪

    公开(公告)号：US20140060030A1

    公开(公告)日：2014-03-06

    申请号：US13908012

    申请日：2013-06-03

    Applicant: Caterpillar Inc.

    Inventor： Pengfei Ma ,  Dayao Chen ,  Randal Peterson

    IPC: E02F9/12

    CPC classification number: E02F9/123 ,  E02F9/2025 ,  E02F9/2217 ,  E02F9/2296 ,  F15B1/024 ,  F15B1/033 ,  F15B1/24 ,  F15B19/005 ,  F15B2201/31 ,  F15B2201/505 ,  F15B2201/51 ,  F15B2211/625 ,  F15B2211/6306 ,  F15B2211/6653 ,  F15B2211/7058 ,  F15B2211/855 ,  F15B2211/857 ,  F15B2211/87

    Abstract: A system and method to diagnose the operational health of a hydraulic accumulator are provided. The system can include a hydraulic accumulator selectively coupled to a hydraulic actuator, such as a swing motor. The accumulator can be charged by movement of the actuator. A pressure sensor can be associated with the accumulator to determine an accumulator pressure. A controller can be connected to the pressure sensor. The controller can determine a charge curve based on a relationship between an actuator operational parameter associated with the actuator movement and the accumulator pressure. The controller can compare the charge curve to a previously defined charge curve or range to determine an error between the charge curve and the previously defined charge curve or range. The degree of the error can be associated with the operational health of the accumulator, and if too large, the operator may be notified of the status.

    Abstract translation: 提供了一种用于诊断液压蓄能器的操作健康的系统和方法。 该系统可以包括选择性地联接到诸如回转马达的液压致动器的液压蓄能器。 蓄能器可以由致动器的移动来充电。 压力传感器可以与蓄能器相关联，以确定蓄能器的压力。 控制器可以连接到压力传感器。 控制器可以基于与致动器运动相关联的致动器操作参数与蓄能器压力之间的关系来确定充气曲线。 控制器可以将充电曲线与先前定义的充电曲线或范围进行比较，以确定充电曲线与先前定义的充电曲线或范围之间的误差。 错误的程度可以与累加器的运行状况相关联，如果过大，可能会向操作员通知状态。

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