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公开(公告)号：US20190257327A1
公开(公告)日：2019-08-22
申请号：US15902721
申请日：2018-02-22
Applicant: Caterpillar Inc.
Inventor： Dayao Chen , Kalpeshkumar N. Patel
Abstract: A monitoring system includes a hydraulic cylinder including a piston movably disposed therein. At least one seal is provided within the hydraulic cylinder. A head end pressure sensor is configured to monitor pressure of a hydraulic fluid in a head space. A rod end pressure sensor is configured to monitor pressure of the fluid in a rod space. A displacement sensor is configured to monitor the position of the piston. A temperature sensor is disposed and configured to monitor the temperature of the hydraulic fluid. An electronic control unit is in communication with the sensors and programmed to in response to receiving pressure signals from the pressure sensors, position signals from the position sensor, and temperature signals from the temperature sensor, determine a wear volume of the at least one seal; and compare the wear volume of the at least one seal to a predetermined threshold wear volume of the at least one seal to determine the remaining useful life of the hydraulic cylinder.
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公开(公告)号：US20190228637A1
公开(公告)日：2019-07-25
申请号：US15877664
申请日：2018-01-23
Applicant: Caterpillar Inc.
Inventor： Dayao Chen , Aleksandar Egelja , Kalpeshkumar N. Patel
Abstract: A monitoring system includes a hydraulic accumulator including a piston movably disposed therein. At least one seal encompasses the piston. A first pressure sensor is configured to monitor pressure of a first fluid in a first chamber. A second pressure sensor is configured to monitor pressure of a second fluid in a second chamber. A first temperature sensor is disposed in the first chamber and configured to monitor the temperature of the first fluid. A second temperature sensor is disposed in the second chamber and configured to monitor the temperature of the second fluid. An electronic control unit is in communication with the sensors and programmed to in response to receiving pressure signals from the pressure sensors and temperature signals from the temperature sensors, determine a wear volume of the at least one seal; and compare the wear volume of the at least one seal to a predetermined threshold wear volume of the at least one seal to determine the remaining useful life of the hydraulic accumulator.
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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
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。
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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
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。
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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
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。
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Patent Agency Ranking
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。
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公开(公告)号：US20140060030A1
公开(公告)日：2014-03-06
申请号：US13908012
申请日：2013-06-03
Applicant: Caterpillar Inc.
Inventor： Pengfei Ma , Dayao Chen , Randal Peterson
IPC: E02F9/12
CPC classification number: E02F9/123 , E02F9/2025 , E02F9/2217 , E02F9/2296 , F15B1/024 , F15B1/033 , F15B1/24 , F15B19/005 , F15B2201/31 , F15B2201/505 , F15B2201/51 , F15B2211/625 , F15B2211/6306 , F15B2211/6653 , F15B2211/7058 , F15B2211/855 , F15B2211/857 , F15B2211/87
Abstract: A system and method to diagnose the operational health of a hydraulic accumulator are provided. The system can include a hydraulic accumulator selectively coupled to a hydraulic actuator, such as a swing motor. The accumulator can be charged by movement of the actuator. A pressure sensor can be associated with the accumulator to determine an accumulator pressure. A controller can be connected to the pressure sensor. The controller can determine a charge curve based on a relationship between an actuator operational parameter associated with the actuator movement and the accumulator pressure. The controller can compare the charge curve to a previously defined charge curve or range to determine an error between the charge curve and the previously defined charge curve or range. The degree of the error can be associated with the operational health of the accumulator, and if too large, the operator may be notified of the status.
Abstract translation: 提供了一种用于诊断液压蓄能器的操作健康的系统和方法。 该系统可以包括选择性地联接到诸如回转马达的液压致动器的液压蓄能器。 蓄能器可以由致动器的移动来充电。 压力传感器可以与蓄能器相关联，以确定蓄能器的压力。 控制器可以连接到压力传感器。 控制器可以基于与致动器运动相关联的致动器操作参数与蓄能器压力之间的关系来确定充气曲线。 控制器可以将充电曲线与先前定义的充电曲线或范围进行比较，以确定充电曲线与先前定义的充电曲线或范围之间的误差。 错误的程度可以与累加器的运行状况相关联，如果过大，可能会向操作员通知状态。
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公开(公告)号：US11428336B2
公开(公告)日：2022-08-30
申请号：US17112624
申请日：2020-12-04
Applicant: Caterpillar Inc.
Inventor： William N. O'Neill , Bruno L. Risatti , Michael A. Zolvinski , Bill F. Erdman , Dayao Chen
Abstract: A ball float vent valve includes a valve body having an inlet port, an outlet port and an axial passageway there-between. The passageway may be defined by a cylindrical inlet chamber, a cylindrical outlet chamber and a tapered seat connecting the inlet chamber and outlet chamber. The outlet chamber may include an annular retaining groove proximate the outlet port. A spherical float may be positioned in the outlet chamber. The float may be dimensioned to seal the passageway when seated on the tapered seat. A retainer positioned in the retaining groove may include an outer crescent region having a plurality of apertures, a center region dimensioned to retain the float in the outlet chamber, and a linking region connecting the outer region to the center region.
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公开(公告)号：US09932993B2
公开(公告)日：2018-04-03
申请号：US14936137
申请日：2015-11-09
Applicant: Caterpillar Inc.
Inventor： Jiao Zhang , Dayao Chen , Jeremy T. Peterson , Michael L. Knussman
CPC classification number: F15B11/024 , F15B1/024 , F15B1/027 , F15B1/04 , F15B1/26 , F15B11/08 , F15B13/021 , F15B21/14 , F15B2201/00 , F15B2211/20546 , F15B2211/20569 , F15B2211/212 , F15B2211/3058 , F15B2211/3133 , F15B2211/6306 , F15B2211/6309 , F15B2211/6313 , F15B2211/7142 , F15B2211/88
Abstract: A hydraulic control system for a machine is provided. The hydraulic control system includes a fluid reservoir, a pump motor and an accumulator. The pump motor is configured to provide pressurized fluid and to receive fluid to provide a power output. The hydraulic control system further includes a hydraulic actuator having a first and a second chamber, a first valve, a regenerative valve, and a controller. The controller is in communication with the first valve and the regenerative valve to selectively actuate the regenerative valve to allow flow of a first portion of the fluid from the first chamber to the second chamber. The controller is further configured to selectively actuate the first valve to allow flow of a second portion of the fluid from the first chamber through the pump motor to provide the power output to a shaft of a power source.
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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
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.
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