公开(公告)号：US11719265B2

公开(公告)日：2023-08-08

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

CPC classification number: F15B21/0423 ,  E02F9/226 ,  E02F9/2267

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：US11430319B1

公开(公告)日：2022-08-30

申请号：US17489466

申请日：2021-09-29

Applicant: Caterpillar Inc.

Inventor： Nathan S Pauli ,  Pengfei Ma ,  Kalpeshkumar N. Patel ,  Richard Andrew Carpenter ,  James David Siegle ,  Vignesh Jayakumar ,  Richard Scott Cushing

IPC: G08B21/18

Abstract: Cavitation that occurs within a pump of a machine, such as truck or other work machine, can potentially damage the pump and/or other components of the machine. The machine can have a cavitation monitor configured to detect cavitation and/or cavitation damage associated with the pump based on vibration data, speed data associated with mechanical movements of the pump, and operating data associated with the machine overall. If the cavitation monitor detects cavitation and/or cavitation damage, the cavitation monitor can cause corresponding alerts to be displayed to a machine operator or other user.

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：US20140174064A1

公开(公告)日：2014-06-26

申请号：US13723359

申请日：2012-12-21

Applicant: CATERPILLAR INC.

Inventor： Pengfei Ma

IPC: F15B13/042

CPC classification number: F15B13/042 ,  F15B1/024 ,  F15B21/14 ,  F15B2211/212 ,  F15B2211/30565 ,  F15B2211/50545 ,  F15B2211/5156 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/7058 ,  F15B2211/755

Abstract: A hydraulic control system for a machine is disclosed. The hydraulic control system includes a swing control valve coupled between the swing motor, the pump and the tank to selectively control a fluid flow between the pump and the swing motor. The hydraulic control system includes a first conduit coupled between a first port of the swing control valve and a first chamber port of the swing motor. Further, a second conduit is coupled between a second port of the swing control valve and a second chamber port of the swing motor. A first chamber valve and a second chamber valve coupled to the first conduit and the second conduit and movable between a first open position, a second open position and a closed position. A controller is configured to selectively move one of the first and second chamber valves to reduce the fluid flow between the swing motor and the tank such that the pressurized flow discharged from the swing motor is directed to an accumulator fluidly coupled to each of the first and second conduits.

Abstract translation: 公开了一种用于机器的液压控制系统。 液压控制系统包括一个回转控制阀，该回转控制阀连接在回转马达，泵和油箱之间，以选择性地控制泵和回转马达之间的流体流动。 液压控制系统包括耦合在回转控制阀的第一端口和回转马达的第一腔室端口之间的第一管道。 此外，第二导管联接在回转控制阀的第二端口和回转马达的第二室端口之间。 第一室阀和第二室阀，其联接到第一管道和第二管道，并且可在第一打开位置，第二打开位置和关闭位置之间移动。 控制器被配置为选择性地移动第一和第二室阀中的一个以减少回转马达和储罐之间的流体流动，使得从回转马达排出的加压流被引导到流体耦合到第一和第二室 第二条管道

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：US12286986B2

公开(公告)日：2025-04-29

申请号：US18239478

申请日：2023-08-29

Applicant: Caterpillar Inc.

Inventor： Pengfei Ma

IPC: F15B19/00 ,  E02F9/22 ,  E02F9/26 ,  F15B11/16

Abstract: The present invention pertains to method for monitoring operation of a hydraulic system, in particular of a hydraulic system of a working machine, having at least one hydraulic actuator. The method comprises a step of determining a predefined operating condition of the hydraulic system; a step of determining an input power parameter being indicative of a power provided by an engine to the hydraulic system during the predetermined operating condition; a step of determining an output power parameter being indicative of a power provided by the hydraulic actuator during the predetermined operating condition; and a step of determining a fault condition of the hydraulic system based on the input power parameter and the output power parameter.

公开(公告)号：US09745940B2

公开(公告)日：2017-08-29

申请号：US14482557

申请日：2014-09-10

Applicant: Caterpillar Inc.

Inventor： Emily Anne Morris ,  Jeremy Todd Peterson ,  Jeffrey Lee Kuehn ,  Dayao Chen ,  Pengfei Ma

IPC: F16D31/02 ,  F02N7/08 ,  E02F9/20 ,  E02F9/22 ,  F02N11/00 ,  B60K6/12

CPC classification number: F02N7/08 ,  B60K2006/126 ,  E02F9/2066 ,  E02F9/2217 ,  E02F9/2246 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F02N11/00 ,  F02N2300/2002 ,  F15B2211/212 ,  F15B2211/851

Abstract: A hydraulic system is disclosed for assisting starting of a machine having an engine. The hydraulic system may include a work tool, a pump driven by the engine to pressurize fluid, and an actuator configured to receive pressurized fluid from the pump and move the work tool. The hydraulic system may also include an accumulator configured to selectively receive pressurized fluid from the pump and from the actuator, an electric starter configured to start the engine, and a motor selectively supplied with fluid from the accumulator to assist the electric starter in starting the engine.