公开(公告)号：US09261118B2

公开(公告)日：2016-02-16

申请号：US14155587

申请日：2014-01-15

Applicant: Caterpillar, Inc.

Inventor： Jiao Zhang ,  Pengfei Ma ,  Vickram Murugesan ,  Tonglin Shang ,  Bryan Jacob Hillman

IPC: F16B21/14 ,  E02F3/43 ,  F15B21/14 ,  E02F9/22

CPC classification number: F15B21/14 ,  E02F9/2228 ,  E02F9/2296 ,  F15B11/006 ,  F15B11/024 ,  F15B2211/30535 ,  F15B2211/30575 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/7053 ,  F15B2211/761

Abstract: A hydraulic system and methods for conserving energy in such system is disclosed. The hydraulic system includes a hydraulic actuator having a head end, a rod end and a piston disposed therebetween. The system also includes a pump that pumps fluid to the actuator, a first valve disposed downstream of the rod end, and a second valve disposed between the pump and the head end of the actuator. When the system is in a load overrunning condition, the second valve is partially closed to restrict the flow of a combined fluid. The combined fluid including fluid received from the pump and fluid received from the rod end of the actuator. When the system is in the light resistive load condition, the second valve is open to allow the combined fluid to flow through the second valve.

Abstract translation: 公开了一种在这种系统中节约能量的液压系统和方法。 液压系统包括具有头端，杆端和设置在其间的活塞的液压致动器。 该系统还包括将流体泵送到致动器的泵，设置在杆端下游的第一阀，以及设置在泵和致动器的头端之间的第二阀。 当系统处于负载超限状态时，第二阀部分关闭以限制组合流体的流动。 包括从泵接收的流体和从致动器的杆端接收的流体的组合流体。 当系统处于轻负载状态时，第二阀打开以允许组合的流体流过第二阀。

公开(公告)号：US09187878B2

公开(公告)日：2015-11-17

申请号：US13714064

申请日：2012-12-13

Applicant: Caterpillar Inc.

Inventor： Tonglin Shang ,  Rustu Cesur ,  Bryan J. Hillman ,  Jiao Zhang

IPC: E02F9/22 ,  E02F9/12 ,  F15B11/048

CPC classification number: E02F9/2278 ,  E02F9/123 ,  E02F9/2207 ,  E02F9/2217 ,  E02F9/2296 ,  F15B11/048 ,  F15B2211/212 ,  F15B2211/30575 ,  F15B2211/327 ,  F15B2211/353 ,  F15B2211/365 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/7058 ,  F15B2211/853 ,  F15B2211/8613 ,  F15B2211/88

Abstract: A hydraulic control system is disclosed. The hydraulic control system may have an input device to generate a first signal indicative of a desired swing motor movement, and a control valve configured to selectively pass fluid to the swing motor and drain from the swing motor to drive the swing motor based on the first signal. The hydraulic control system may also have a pressure sensor to generate a second signal indicative of a swing motor pressure, a speed sensor configured to a third signal indicative of a swing motor speed, and a controller configured to make a comparison of at least one of the swing motor speed and the swing motor pressure with a threshold speed and a threshold pressure, and open the control valve to drain fluid from the swing motor to the tank based on the comparison when the input device is in a neutral condition.

Abstract translation: 公开了一种液压控制系统。 液压控制系统可以具有输入装置，以产生指示期望的回转马达运动的第一信号;以及控制阀，其配置成选择性地将流体传递到回转马达并从回转马达排出，以便基于第一 信号。 液压控制系统还可以具有压力传感器以产生指示回转马达压力的第二信号，被配置为指示回转马达速度的第三信号的速度传感器以及被配置为进行比较以下中的至少一个的控制器： 摆动马达速度和摆动马达压力，具有阈值速度和阈值压力，并且当输入装置处于中立状态时，基于比较，打开控制阀以将流体从摆动马达排出到油箱。

公开(公告)号：US09086081B2

公开(公告)日：2015-07-21

申请号：US13718922

申请日：2012-12-18

Applicant: Caterpillar Inc.

Inventor： Jiao Zhang ,  Pengfei Ma ,  Tonglin Shang ,  Rustu Cesur ,  Bryan J. Hillman ,  Peter Spring ,  Lawrence J. Tognetti ,  Randal N. Peterson ,  Dayao Chen

IPC: F15B21/14

CPC classification number: F15B21/14 ,  F15B1/024 ,  F15B2211/625 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/7058 ,  F15B2211/75 ,  F15B2211/755 ,  F15B2211/88

Abstract: A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control valve configured to control fluid flow between the pump, the swing motor, and the tank. The hydraulic system may also have an accumulator configured to selectively receive pressurized fluid discharged from the swing motor and selectively supply pressurized fluid to the swing motor, at least one accumulator valve, and a controller. The controller may be configured to receive input indicative of a difference between desired and actual speeds of the swing motor, and determine if the swing motor is accelerating or decelerating based on the difference. The controller may also be configured to control the at least one accumulator valve to cause the accumulator to selectively receive or supply pressurized fluid only when the swing motor is accelerating or decelerating.

Abstract translation: 公开了一种用于机器的液压控制系统。 液压控制系统可以具有罐，泵，回转马达和构造成控制泵，回转马达和罐之间的流体流动的至少一个控制阀。 液压系统还可以具有蓄能器，其被配置为选择性地接收从回转马达排出的加压流体，并且选择性地将加压流体供应到回转马达，至少一个储能阀和控制器。 控制器可以被配置为接收指示回转马达的期望速度和实际速度之间的差异的输入，并且基于该差异来确定回转马达是加速还是减速。 控制器还可以被配置成控制至少一个蓄能阀，使得蓄能器仅在回转马达正在加速或减速时有选择地接收或供应加压流体。

公开(公告)号：US20140325972A1

公开(公告)日：2014-11-06

申请号：US13886661

申请日：2013-05-03

Applicant: CATERPILLAR INC.

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

IPC: E02F9/22

CPC classification number: E02F9/2217 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/024 ,  F15B1/033 ,  F15B21/14 ,  F15B2211/20507 ,  F15B2211/20546 ,  F15B2211/212 ,  F15B2211/214 ,  F15B2211/30575 ,  F15B2211/7128 ,  F15B2211/88

Abstract: A hydraulic system includes a hydraulic actuator, an accumulator, an accumulator charge valve, and a hydraulic transformer fluidly connected between the accumulator charge valve and the accumulator. The hydraulic transformer includes a transformer motor mechanically coupled to a transformer pump. The accumulator charge valve is fluidly connected between the transformer motor and the hydraulic actuator. The transformer pump is sized to permit a maximum flow therethrough of no more than three-quarters of a flow permitted through the transformer motor.

Abstract translation: 液压系统包括液压致动器，蓄能器，蓄能器充气阀和流体连接在蓄能器充气阀和蓄能器之间的液压变压器。 液压变压器包括机械耦合到变压器泵的变压器电机。 蓄能器充气阀流体连接在变压器电动机和液压执行器之间。 变压器泵的尺寸允许通过其中最大流量不超过变压器电机允许的流量的四分之三。

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。

公开(公告)号：US09388829B2

公开(公告)日：2016-07-12

申请号：US13718882

申请日：2012-12-18

Applicant: Caterpillar Inc.

Inventor： Jiao Zhang ,  Lawrence J. Tognetti ,  Pengfei Ma ,  Dayao Chen ,  John Ferraz, Jr. ,  Tetsuya Yoshino

IPC: F16D31/02 ,  F15B1/027 ,  F15B1/02 ,  F15B21/14

CPC classification number: F15B1/027 ,  F15B1/024 ,  F15B21/14 ,  F15B2211/625 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/7058 ,  F15B2211/88

Abstract: A hydraulic control system is disclosed for use in a machine. The hydraulic control system may have a work tool, a motor configured to swing the work tool, a tank, a pump configured to draw fluid from the tank and pressurize the fluid, and a control valve operable to control fluid flow from the pump to the motor and from the motor to the tank via first and second chamber passages to affect motion of the motor. The hydraulic control system may also have an accumulator, and an accumulator circuit configured to selectively direct fluid discharged from the motor to the accumulator for storage and to direct stored fluid from the accumulator to the motor to assist the motor. The hydraulic control system may further have a selector valve configured to selectively connect a higher pressure one of the first and second chamber passages with the accumulator, and a single pressure relief valve disposed within the accumulator circuit and configured to relief pressure from opposing sides of the motor.

Abstract translation: 公开了一种在机器中使用的液压控制系统。 液压控制系统可以具有工作工具，构造成摆动工作工具的马达，一个构造成从罐中抽出流体并对流体加压的泵;以及控制阀，该控制阀可操作以控制流体从泵流向 电动机，并通过第一和第二室通道从电动机到燃料箱，以影响电动机的运动。 液压控制系统还可以具有蓄能器和蓄电池电路，其被配置为选择性地将从电动机排出的流体引导到蓄电池以进行存储，并将存储的流体从蓄能器引导到电动机以辅助电动机。 液压控制系统还可以具有一个选择阀，其配置成选择性地将第一和第二室通道中的较高压力的一个与蓄能器连接，以及一个设置在蓄电池回路内的单个泄压阀， 发动机。

公开(公告)号：US09388828B2

公开(公告)日：2016-07-12

申请号：US13718855

申请日：2012-12-18

Applicant: Caterpillar Inc.

Inventor： Bryan J. Hillman ,  Jiao Zhang ,  Lawrence C. Tognetti ,  Peter Spring ,  Rustu Cesur ,  Tonglin Shang

IPC: F16D31/02 ,  F15B1/02 ,  F15B21/14 ,  E02F9/12 ,  E02F9/22

CPC classification number: F15B1/02 ,  E02F9/123 ,  E02F9/2217 ,  E02F9/2296 ,  F15B1/024 ,  F15B21/14 ,  F15B2211/625 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/7058 ,  F15B2211/88

Abstract: A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control. The hydraulic control system may further have an accumulator configured to receive fluid from and supply fluid to the swing motor, a charge valve movable to allow fluid flow from the swing motor into the accumulator, and a discharge valve movable to allow fluid flow from the accumulator to the swing motor. The hydraulic control system may additionally have a controller in communication with the at least one control valve, the charge valve, and the discharge valve. The controller may be configured to detect an acceleration of the swing motor, selectively cause the discharge valve to assist the acceleration, and selectively move the charge valve to an open position to recover energy associated with pressure spikes occurring during the acceleration.

Abstract translation: 公开了一种用于机器的液压控制系统。 液压控制系统可以具有罐，泵，回转马达和至少一个控制器。 液压控制系统还可以具有一个蓄能器，其被配置为从回转马达接收流体并向其提供流体;充气阀，其可移动以允许流体从回转马达流入蓄能器;以及排出阀，其可移动以允许流体从累加器流出 到摆动马达。 液压控制系统还可以具有与至少一个控制阀，充气阀和排放阀连通的控制器。 控制器可以被配置为检测回转马达的加速度，选择性地使排放阀辅助加速，并且选择性地将充气阀移动到打开位置以恢复与在加速期间发生的压力峰值相关联的能量。

公开(公告)号：US20140150415A1

公开(公告)日：2014-06-05

申请号：US13693509

申请日：2012-12-04

Applicant: CATERPILLAR INC.

Inventor： Jiao Zhang ,  Gang Wen ,  Pengfei Ma ,  Tonglin Shang ,  Dayao Chen ,  Bryan J. Hillman ,  Vickram Murugesan

IPC: F04B7/02

CPC classification number: F04B7/02 ,  F04B49/002 ,  F15B1/024 ,  F15B21/14 ,  F15B2211/20507 ,  F15B2211/212 ,  F15B2211/30565 ,  F15B2211/3058 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/7053 ,  F15B2211/88

Abstract: A method and system for accumulating and using recovered hydraulic energy that includes a hydraulic actuator and a pump configured to supply pressurized fluid to the hydraulic actuator. An energy recovery system includes a hydraulic motor, a charge valve and an accumulator configured to store fluid from the hydraulic actuator. The charge valve is operatively connected between the hydraulic actuator and the accumulator and between the accumulator and the hydraulic motor and is configured to place the hydraulic actuator in fluid communication with the accumulator and to place the accumulator in fluid communication with the hydraulic motor. A directional valve is operatively connected between the pump and the hydraulic actuator. The directional valve is configured to place the pump in fluid communication with the hydraulic actuator and to direct the flow of hydraulic fluid exiting the hydraulic actuator to the charge valve in an energy recovery mode.

Abstract translation: 一种用于累积和使用回收液压能量的方法和系统，包括液压致动器和构造成向液压致动器供应加压流体的泵。 能量回收系统包括液压马达，充气阀和蓄液器，其构造成存储来自液压致动器的流体。 充气阀可操作地连接在液压致动器和蓄能器之间以及蓄能器和液压马达之间，并被构造成使液压致动器与蓄能器流体连通并且使蓄能器与液压马达流体连通。 方向阀可操作地连接在泵和液压致动器之间。 方向阀被配置为将泵与液压致动器流体连通并且以能量回收模式将流出液压致动器的液压流体的流动引导到充气阀。