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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：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
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。
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Patent Agency Ranking
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
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。
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公开(公告)号：US20210148471A1
公开(公告)日：2021-05-20
申请号：US16688397
申请日：2019-11-19
Applicant: Caterpillar Inc.
Inventor： Vickram Murugesan , Robert Eugene Riedel, JR.
Abstract: A plug valve is disclosed having one or more components that are coated to reduce wear on the components. A plug of the valve may include a bore therethrough defined by an inner surface of the plug. The inner surface of the plug may include a nitride layer, such as a carbonitride layer. An outer surface of the plug may include both a nitride layer, in addition to a thermal spray coated layer, such as WC. The nitride layer may be formed by a ferritic nitrocarburizing process and the thermal spray coating may be formed by a high velocity air fuel (HVAF) or similar process. Inserts of the plug valve may also be coated by similar processes. An outer surface of the inserts may have a nitride layer and an inner surface of the inserts may have a nitride layer and a thermal spray coating.
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5.发明授权公开(公告)号：US10323384B2
公开(公告)日：2019-06-18
申请号：US15373074
申请日：2016-12-08
Applicant: Caterpillar Inc.
Inventor： Vickram Murugesan , Hongliu Du , Lonnie James Devier , Frank Breier , Mandi Henderson , Matthew James Beschorner
Abstract: A ride control system includes four independent metering valves (IMVs) that are independently and selectively controlled by a controller for attenuating oscillations in a hydraulic actuator of a machine. The controller is configured to open at least one of the IMVs for supplying pressurized fluid from a tank to a head end chamber of the hydraulic actuator when a pressure of the head end chamber drops to a value less than an initially registered pressure. Additionally, when the displacement of the piston block is positive and the pressure in the head end chamber falls to a value less than the pressure of fluid in a rod end chamber of the hydraulic actuator, the controller may also open another one of the IMVs by which fluid from the rod end chamber could be supplied to the head end chamber for supplementing pump flow and attenuating oscillations in the hydraulic actuator.
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6.发明申请公开(公告)号：US20180163373A1
公开(公告)日：2018-06-14
申请号：US15373074
申请日：2016-12-08
Applicant: Caterpillar Inc.
Inventor： Vickram Murugesan , Hongliu Du , Lonnie James Devier , Frank Breier , Mandi Henderson , Matthew James Beschorner
CPC classification number: E02F9/2207 , E02F3/283 , E02F9/0883 , E02F9/2228 , E02F9/2296 , F15B1/26 , F15B11/08 , F15B13/0401 , F15B2211/20546 , F15B2211/7051
Abstract: A ride control system includes four independent metering valves (IMVs) that are independently and selectively controlled by a controller for attenuating oscillations in a hydraulic actuator of a machine. The controller is configured to open at least one of the IMVs for supplying pressurized fluid from a tank to a head end chamber of the hydraulic actuator when a pressure of the head end chamber drops to a value less than an initially registered pressure. Additionally, when the displacement of the piston block is positive and the pressure in the head end chamber falls to a value less than the pressure of fluid in a rod end chamber of the hydraulic actuator, the controller may also open another one of the IMVs by which fluid from the rod end chamber could be supplied to the head end chamber for supplementing pump flow and attenuating oscillations in the hydraulic actuator.
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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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