公开(公告)号：US20140283915A1

公开(公告)日：2014-09-25

申请号：US13848391

申请日：2013-03-21

Applicant: CATERPILLAR INC.

Inventor： Pengfei Ma ,  Dayao Chen ,  Jiao Zhang ,  Tonglin Shang ,  Gang Wen

IPC: F15B1/027

CPC classification number: F15B1/027 ,  E02F9/2217 ,  E02F9/2242 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/024 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/212 ,  F15B2211/30595 ,  F15B2211/7135 ,  F15B2211/7142 ,  F15B2211/8606 ,  F15B2211/88 ,  Y10T137/0318 ,  Y10T137/86059

Abstract: A hydraulic circuit may be provided. The circuit may include: a pump to supply pressurized fluid to a circuit; a supply passageway coupled between the pump and the circuit; a relief flow passageway coupled between the supply passageway and a fluid reservoir; a relief flow capture circuit coupled to the relief flow passageway, the relief flow capture circuit including: a first valve configured to move from a closed position to an open position when a first pressure is detected; a second valve in fluid communication with the first valve, the second valve configured to move from a closed position to an open position when a second pressure is detected wherein the second pressure is lower than the first pressure; and an accumulator located between the first and second valves and in fluid communication with both the first and second valves, the accumulator configured to store fluid flowing through the first valve when the first pressure valve is in an open position, the accumulator further configured to outflow fluid through the second valve when the second valve is in an open position.

Abstract translation: 可以提供液压回路。 该电路可以包括：将加压流体供应到电路的泵; 连接在泵和电路之间的供应通道; 耦合在所述供应通道和流体储存器之间的释放流动通道; 释放流捕获电路，其耦合到所述释放流通道，所述释放流捕获电路包括：构造成当检测到第一压力时从关闭位置移动到打开位置的第一阀; 与所述第一阀流体连通的第二阀，所述第二阀构造成当检测到第二压力时从关闭位置移动到打开位置，其中所述第二压力低于所述第一压力; 位于第一和第二阀之间并且与第一和第二阀两者流体连通的蓄能器，蓄能器构造成在第一压力阀处于打开位置时存储流过第一阀的流体，蓄能器进一步构造成流出 当第二阀处于打开位置时通过第二阀的流体。

公开(公告)号：US20140208728A1

公开(公告)日：2014-07-31

申请号：US13752085

申请日：2013-01-28

Applicant: CATERPILLAR INC.

Inventor： Pengfei Ma ,  Victor Wen ,  Jiao Zhang ,  Dayao Chen ,  Tonglin Shang ,  Aleksandar M. Egelja

IPC: E02F9/22 ,  F15B11/042 ,  F15B13/04

CPC classification number: E02F9/2217 ,  E02F9/123 ,  E02F9/2296 ,  F15B1/024 ,  F15B11/006 ,  F15B11/042 ,  F15B13/04 ,  F15B21/14 ,  F15B2211/20546 ,  F15B2211/212 ,  F15B2211/30575 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/6658 ,  F15B2211/7058 ,  F15B2211/88

Abstract: A hydraulic control system includes a swing control valve between a pump and a swing motor to control flow to/from the swing motor, and a selector valve between an accumulator and the swing motor to regulate fluid flow. A controller is configured to receive inputs indicative of the pressure differential between the accumulator and conduit between the pump and swing motor, and a swing motor command, calculate a target swing motor flow based on the swing motor command input, and modulate operation of the swing control valve and the selector valve to regulate a swing speed.

Abstract translation: 液压控制系统包括在泵和回转马达之间的回转控制阀，以控制往返于回转马达的流量，以及在蓄能器和回转马达之间的选择阀以调节流体流量。 控制器被配置为接收表示在泵和回转马达之间的蓄能器与导管之间的压力差的输入和摆动马达指令，基于回转马达指令输入计算目标回转马达流量，并且调节摆动的运行 控制阀和选择阀调节摆动速度。