公开(公告)号：US20160281330A1

公开(公告)日：2016-09-29

申请号：US14668678

申请日：2015-03-25

Applicant: Caterpillar Inc.

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

IPC: E02F9/22 ,  E02F9/20 ,  E02F3/42 ,  E02F3/32

CPC classification number: E02F9/2217 ,  E02F3/32 ,  E02F3/425 ,  E02F9/123 ,  E02F9/128 ,  E02F9/2004 ,  E02F9/2267 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/20507 ,  F15B2211/212 ,  F15B2211/7058 ,  F15B2211/7142 ,  F15B2211/88

Abstract: Swing kinetic and boom potential energy may be recovered in a machine having a movable work tool, a swing motor for rotating the work tool, a hydraulic cylinder for raising and lowering the work tool, a pump selectively connected to the swing motor and the hydraulic cylinder, and a power source outputting power to drive the pump. The machine may further include a first accumulator, a swing charge valve having a charge set pressure, and a boom charge valve. The swing charge valve selectively fluidly connect the swing motor to the first accumulator, and open to fluidly connect the swing motor to the first accumulator when a swing motor fluid pressure is greater than a charge set pressure of the swing charge valve. The boom charge valve may selectively fluidly connect a head-end chamber of the hydraulic cylinder to the first accumulator when the work tool is lowered.

Abstract translation: 在具有可移动工作工具的机器，用于旋转工作工具的回转马达，用于升高和降低作业工具的液压缸，可选择地连接到回转马达和液压缸 以及输出驱动泵的动力的电源。 机器还可以包括第一蓄能器，具有充电设定压力的摆动充气阀和吊杆充气阀。 摆动充气阀选择性地将回转马达流体地连接到第一蓄能器，并且当回转马达流体压力大于摆动充气阀的充电设定压力时，打开以将回转马达流体连接到第一累加器。 当工作工具下降时，吊杆充气阀可以选择性地将液压缸的前端室流体连接到第一蓄能器。

公开(公告)号：US20160281329A1

公开(公告)日：2016-09-29

申请号：US14668607

申请日：2015-03-25

Applicant: Caterpillar Inc.

Inventor： Tonglin Shang ,  Dayao Chen ,  Pengfei Ma

IPC: E02F9/22 ,  F15B13/06 ,  F15B11/17 ,  F15B21/14 ,  F15B11/16

CPC classification number: E02F9/2217 ,  E02F9/123 ,  E02F9/128 ,  E02F9/2066 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/161 ,  F15B11/17 ,  F15B13/06 ,  F15B21/14 ,  F15B2211/20507 ,  F15B2211/212 ,  F15B2211/30575 ,  F15B2211/7058 ,  F15B2211/7142 ,  F15B2211/88

Abstract: An energy recovery system for a machine having a movable work tool, a swing motor to swing the work tool about a vertical axis, a pump providing pressurized fluid to the swing motor, a power source outputting power to drive the pump, and a controller. The energy recovery system may include a first accumulator, a swing charge valve selectively connecting the swing motor to the first accumulator, an assist motor operatively connected to the power source, and a discharge selectively connecting the first accumulator to the assist motor. The swing charge valve may fluidly connect the swing motor to the first accumulator when fluid pressure from the swing motor is greater than a charge set pressure. The controller may cause the discharge valve to fluidly connect the first accumulator with the assist motor when the power demand on the power source is greater than a minimum assisted power demand.

Abstract translation: 一种用于具有可移动工作工具的机器的能量回收系统，围绕垂直轴线摆动工作工具的回转马达，向回转马达提供加压流体的泵，输出动力来驱动泵的动力源和控制器。 能量回收系统可以包括第一蓄能器，摆动充电阀选择性地将回转电动机连接到第一蓄能器，可操作地连接到电源的辅助电动机和选择性地将第一蓄能器连接到辅助电动机的放电。 当来自回转电动机的流体压力大于充电设定压力时，摆动充气阀可以将回转马达流体地连接到第一蓄能器。 当电源的功率需求大于最小辅助功率需求时，控制器可以使排放阀将第一蓄能器与辅助电动机流体连接。

公开(公告)号：US20160138619A1

公开(公告)日：2016-05-19

申请号：US14541586

申请日：2014-11-14

Applicant: Caterpillar Inc.

Inventor： Jiao Zhang ,  Tonglin Shang ,  Santosh Ancha ,  Pengfei Ma

IPC: F15B11/028 ,  F15B13/042 ,  F15B11/10

CPC classification number: F15B11/17 ,  E02F9/2217 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/2239 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/20576 ,  F15B2211/30 ,  F15B2211/6652 ,  F15B2211/6655 ,  F15B2211/6658 ,  F15B2211/71

Abstract: A hydraulic system includes a first pump to provided pressurized fluid to a first hydraulic circuit and a second pump to provide pressurized fluid to a second hydraulic circuit. When the hydraulic system is in an energy conservation mode, the output power of the first pump is reduced to less than the hydraulic power demand of the first hydraulic circuit.

Abstract translation: 液压系统包括将加压流体提供给第一液压回路的第一泵和用于向第二液压回路提供加压流体的第二泵。 当液压系统处于节能模式时，第一泵的输出功率降低到小于第一液压回路的液压动力需求。

公开(公告)号：US20150197915A1

公开(公告)日：2015-07-16

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: E02F3/43 ,  E02F3/42 ,  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：US09556591B2

公开(公告)日：2017-01-31

申请号：US14668678

申请日：2015-03-25

Applicant: Caterpillar Inc.

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

IPC: E02F9/22 ,  E02F3/32 ,  E02F9/20 ,  E02F3/42

CPC classification number: E02F9/2217 ,  E02F3/32 ,  E02F3/425 ,  E02F9/123 ,  E02F9/128 ,  E02F9/2004 ,  E02F9/2267 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/20507 ,  F15B2211/212 ,  F15B2211/7058 ,  F15B2211/7142 ,  F15B2211/88

Abstract: Swing kinetic and boom potential energy may be recovered in a machine having a movable work tool, a swing motor for rotating the work tool, a hydraulic cylinder for raising and lowering the work tool, a pump selectively connected to the swing motor and the hydraulic cylinder, and a power source outputting power to drive the pump. The machine may further include a first accumulator, a swing charge valve having a charge set pressure, and a boom charge valve. The swing charge valve selectively fluidly connect the swing motor to the first accumulator, and open to fluidly connect the swing motor to the first accumulator when a swing motor fluid pressure is greater than a charge set pressure of the swing charge valve. The boom charge valve may selectively fluidly connect a head-end chamber of the hydraulic cylinder to the first accumulator when the work tool is lowered.

Abstract translation: 在具有可移动工作工具的机器，用于旋转工作工具的回转马达，用于升高和降低作业工具的液压缸，可选择地连接到回转马达和液压缸 以及输出驱动泵的动力的电源。 机器还可以包括第一蓄能器，具有充电设定压力的摆动充气阀和吊杆充气阀。 摆动充气阀选择性地将回转马达流体地连接到第一蓄能器，并且当回转马达流体压力大于摆动充气阀的充电设定压力时，打开以将回转马达流体连接到第一累加器。 当工作工具下降时，吊杆充气阀可以选择性地将液压缸的前端室流体连接到第一蓄能器。

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。

公开(公告)号：US09091286B2

公开(公告)日：2015-07-28

申请号：US13718938

申请日：2012-12-18

Applicant: Caterpillar Inc.

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

IPC: F15B13/04 ,  F15B21/08 ,  E02F9/22 ,  F15B11/17

CPC classification number: F15B21/08 ,  E02F9/2203 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/17 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30575 ,  F15B2211/30595 ,  F15B2211/327 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6346 ,  F15B2211/6654 ,  F15B2211/7135 ,  F15B2211/7142 ,  F15B2211/75 ,  F15B2211/86

Abstract: A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, an actuator, and a control valve configured to direct fluid from the pump to the actuator and from the actuator to the tank. The hydraulic control system may also have a pressure sensor to generate a first signal indicative of a pressure differential across the control valve, an operator input device to generate a second signal indicative of a desired movement of the actuator, and a controller. The controller may be configured to make a first determination of an opening amount of the control valve based on the second signal, and to make a second determination based on the first signal of whether the opening amount will result in overspeeding of the actuator. The controller may also be configured to reduce the opening amount based on the second determination.

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，致动器和配置成将流体从泵引导到致动器并且从致动器引导到罐的控制阀。 液压控制系统还可以具有压力传感器以产生指示跨越控制阀的压力差的第一信号，操作者输入装置以产生指示致动器的期望运动的第二信号和控制器。 控制器可以被配置为基于第二信号来首先确定控制阀的打开量，并且基于第一信号来确定开启量是否将导致致动器的超速。 控制器还可以被配置为基于第二确定来减少打开量。

公开(公告)号：US09086061B2

公开(公告)日：2015-07-21

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: F15B21/14 ,  F04B7/02 ,  F04B49/00 ,  F15B1/02

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。

公开(公告)号：US20140060031A1

公开(公告)日：2014-03-06

申请号：US13718907

申请日：2012-12-18

Applicant: CATERPILLAR INC.

Inventor： Rustu Cesur ,  Lawrence J. Tognetti ,  Pengfei Ma ,  Jiao Zhang ,  Tonglin Shang

IPC: F15B1/033 ,  F15B21/14 ,  F15B13/04

CPC classification number: F15B1/033 ,  F15B1/024 ,  F15B13/04 ,  F15B21/082 ,  F15B21/14 ,  F15B2211/20546 ,  F15B2211/212 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/6652 ,  F15B2211/6658 ,  F15B2211/7058 ,  F15B2211/8603 ,  F15B2211/8752 ,  F15B2211/88

Abstract: A hydraulic control system for a machine is disclosed. The hydraulic control system may have a tank, a pump, and a fluid actuator. The hydraulic control system may further have an accumulator configured to selectively receive pressurized fluid discharged from the fluid actuator and selectively supply pressurized fluid to the fluid actuator. The hydraulic control system may also have a pressure sensor configured to generate a signal indicative of a pressure of the accumulator, a charge valve, a discharge valve, and a controller in communication with the control valve, the charge valve, and the discharge valve. The controller may be configured to detect stall of the fluid actuator, to make a comparison of the pressure of the accumulator with a threshold pressure, and to selectively move the charge valve to charge the accumulator or move the discharge valve to discharge the accumulator during the stall based on the comparison.

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，泵和流体致动器。 液压控制系统还可以具有蓄能器，该蓄能器构造成选择性地接收从流体致动器排出的加压流体并且选择性地将加压流体供应到流体致动器。 液压控制系统还可以具有压力传感器，该压力传感器被配置为产生指示蓄能器，充气阀，排放阀和与控制阀，充气阀和排出阀连通的控制器的压力的信号。 控制器可以被配置为检测流体致动器的失速，以使蓄能器的压力与阈值压力进行比较，并且选择性地移动充气阀以对蓄能器充电或移动排放阀以在蓄能器期间释放蓄能器 摊位基于比较。

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。