公开(公告)号：US09458604B2

公开(公告)日：2016-10-04

申请号：US14146994

申请日：2014-01-03

Applicant: CATERPILLAR INC.

Inventor： Jiao Zhang ,  Michael Schwab ,  Pengfei Ma

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

CPC classification number: E02F9/2217 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/024 ,  F15B21/14

Abstract: A hydraulic apparatus and a method of operating the hydraulic apparatus are disclosed. The hydraulic apparatus includes a flow control module, a first pump fluidly coupled to the flow control module via a first conduit, a first rotating group fluidly coupled to the flow control module via a second conduit, a first actuator fluidly coupled to the flow control module, a second actuator fluidly coupled to a second pump, a first accumulator, and a controller operatively coupled to the flow control module, the first charge valve, and the discharge valve. The first rotating group is configured to perform a pumping function and a motor function. The first accumulator is in selective fluid communication with the first actuator via a third conduit and a first charge valve, the second actuator via a fourth conduit and the first charge valve, and the first rotating group via a discharge valve.

Abstract translation: 公开了一种液压装置和操作该液压装置的方法。 液压装置包括流量控制模块，经由第一导管流体耦合到流量控制模块的第一泵，通过第二导管流体耦合到流量控制模块的第一旋转组件，流体耦合到流量控制模块的第一致动器 ，流体地联接到第二泵的第二致动器，第一蓄能器和可操作地耦合到流量控制模块，第一充气阀和排放阀的控制器。 第一旋转组被配置为执行泵送功能和马达功能。 第一蓄能器经由第三管道和第一充气阀与第一致动器选择性地流体连通，第二致动器经由第四管道和第一充气阀，以及经由排出阀的第一旋转组。

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：US11572925B2

公开(公告)日：2023-02-07

申请号：US17231039

申请日：2021-04-15

Applicant: Caterpillar Inc.

Inventor： Pengfei Ma ,  Puning Wei ,  Aleksander Gust

IPC: F16D65/76 ,  B60T13/12

Abstract: A slack adjuster assembly and systems, components, and methods can comprise a sensing piston assembly that includes a housing, a piston slidably provided in the housing, and a biasing member provided in the housing. The biasing member can be configured to bias the piston away from an end wall of the housing. The piston can have an end wall opposite the end wall of the housing, where the end wall of the piston can have at least one orifice that extends from a first side of the end wall of the piston to a second side of the end wall of the piston.

公开(公告)号：US20220364581A1

公开(公告)日：2022-11-17

申请号：US17320480

申请日：2021-05-14

Applicant: Caterpillar Inc.

Inventor： Gustaf Andrew Johnson ,  Pengfei Ma ,  Jordan Garrity

IPC: F15B21/0423 ,  E02F9/22

Abstract: A work machine includes a frame, a traction system supporting the frame, an implement system supported by the frame, and a hydraulic system. The hydraulic system includes a hydraulic oil tank, a control circuit, an oil cooler, and a cooler bypass valve assembly. The cooler bypass valve assembly is connected to the control circuit by a control circuit return line, and includes an unloading valve configured to allow hydraulic oil to flow from the control circuit return line to the hydraulic oil tank if a pressure of hydraulic oil in the control circuit return line exceeds a first threshold, a backpressure valve configured to allow hydraulic oil to flow from the return line to the oil cooler through an oil cooler inlet line if a pressure of hydraulic in the oil control circuit return line exceeds a second threshold, and an orifice configured to limit the flow of hydraulic oil through the backpressure valve.

公开(公告)号：US09829014B2

公开(公告)日：2017-11-28

申请号：US14696869

申请日：2015-04-27

Applicant: Caterpillar Inc.

Inventor： Andrew J. Kleitsch ,  Pengfei Ma ,  Jason L. Brinkman ,  Mikhail Sorokin

IPC: F15B11/16 ,  F15B11/00 ,  E02F9/22

CPC classification number: F15B11/165 ,  E02F9/2228 ,  F15B11/006 ,  F15B11/163 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/30535 ,  F15B2211/30555 ,  F15B2211/30575 ,  F15B2211/61 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/6346 ,  F15B2211/6355 ,  F15B2211/6652 ,  F15B2211/6654 ,  F15B2211/7142

Abstract: An independent metering valve circuit includes an actuator, a set of independent metering valves, an independent metering valve pre-compensator, an inverse resolver, and a signal conditioning element. The set of independent metering valves are fluidly coupled to the actuator and configured to independently control a flow of a hydraulic fluid to the actuator. The independent metering valve pre-compensator is configured to control the flow of the hydraulic fluid to the set of independent metering valves. The inverse resolver is configured to receive a first pressure signal from the independent metering valve circuit and a second pressure signal from a load-sense hydraulic system and output a third pressure signal. The signal conditioning element is configured to receive the third pressure signal and output a forth pressure signal configured to control a pump fluidly coupled to the load-sense hydraulic system and the independent metering valve circuit.

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：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。