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公开(公告)号：US10337532B2
公开(公告)日：2019-07-02
申请号：US15367675
申请日：2016-12-02
申请人： Caterpillar Inc.
发明人： Pengfei Ma , Aleksandar Egelja , Justin Speichinger , Shuhei Orimoto , Tetsuya Yoshino , Hideki Nakajima , Shogo Tada , Aleem Junaidi , Bryan Johnson , Matthew Beschorner
IPC分类号： F15B13/04 , F15B11/08 , F15B13/02 , F15B21/14 , F15B1/26 , F15B13/044 , F15B11/00 , F15B11/024
摘要： A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.
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公开(公告)号：US09394929B2
公开(公告)日：2016-07-19
申请号：US13957052
申请日：2013-08-01
申请人： Caterpillar Inc.
发明人： Keith Edward Lawrence , John James Krone , Nick William Biggs , Karl Arthur Kirsch , Yuya Kanenawa , Tetsuya Yoshino , Magomed Gabibulayev
CPC分类号： F15B21/047 , E02F3/435 , E02F9/2207 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B2211/20546 , F15B2211/30505 , F15B2211/30565 , F15B2211/31558 , F15B2211/329 , F15B2211/40507 , F15B2211/41581 , F15B2211/50518 , F15B2211/5159 , F15B2211/575 , F15B2211/6346 , F15B2211/6355 , F15B2211/88
摘要： In order to avoid cavitation in a boom cylinder head end at the beginning of a dig cycle, fluid from an alternate source is supplied to the head end before or in addition to fluid supplied by the main boom-up hydraulic circuit. In one embodiment, an electronic hydraulic valve, related sensors, and control system determines the beginning of a dig operation and uses fluid at an intermediate pressure to rapidly provide fluid to a boom head end cylinder to prevent voiding or cavitation before fluid under high pressure from the main pump can be brought to the cylinder. An on/off fluid switch is activated early in a dig operation to address low pressure at the boom cylinder head end and provide an alternate path for fluid into the cylinder in reaction to the boom being lifted by a motion of the stick and bucket in contact with the work surface.
摘要翻译： 为了避免挖掘循环开始时起重臂气缸头端部的气蚀，来自替代源的流体在由主动臂上升液压回路供给的流体之前或之外被提供给头端。 在一个实施例中，电子液压阀，相关传感器和控制系统确定挖掘操作的开始并且使用中间压力的流体来快速地向动臂头端部气缸提供流体，以防止在高压下的流体之间的空洞或空化 主泵可以带到气缸。 在挖掘操作早期开启/关闭流体开关以解决动臂油缸头端的低压，并提供流体进入气缸的替代路径，以响应于通过杆和铲斗的接触而被提升的动臂被接触 与工作表面。
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公开(公告)号：US20180156244A1
公开(公告)日：2018-06-07
申请号：US15367675
申请日：2016-12-02
申请人： Caterpillar Inc.
发明人： Pengfei Ma , Aleksandar Egelja , Justin Speichinger , Shuhei Orimoto , Tetsuya Yoshino , Hideki Nakajima , Shogo Tada , Aleem Junaidi , Bryan Johnson , Matthew Beschorner
CPC分类号： F15B13/0402 , F15B1/26 , F15B11/003 , F15B11/024 , F15B11/08 , F15B13/021 , F15B13/024 , F15B13/044 , F15B13/0442 , F15B21/14 , F15B2011/0246 , F15B2211/50
摘要： A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.
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公开(公告)号：US20150033719A1
公开(公告)日：2015-02-05
申请号：US13957052
申请日：2013-08-01
申请人： Caterpillar Inc.
发明人： Keith Edward Lawrence , John James Krone , Nick William Biggs , Karl Arthur Kirsch , Yuya Kanenawa , Tetsuya Yoshino , Magomed Gabibulayev
IPC分类号： F15B11/10 , F15B13/042
CPC分类号： F15B21/047 , E02F3/435 , E02F9/2207 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B2211/20546 , F15B2211/30505 , F15B2211/30565 , F15B2211/31558 , F15B2211/329 , F15B2211/40507 , F15B2211/41581 , F15B2211/50518 , F15B2211/5159 , F15B2211/575 , F15B2211/6346 , F15B2211/6355 , F15B2211/88
摘要： In order to avoid cavitation in a boom cylinder head end at the beginning of a dig cycle, fluid from an alternate source is supplied to the head end before or in addition to fluid supplied by the main boom-up hydraulic circuit. In one embodiment, an electronic hydraulic valve, related sensors, and control system determines the beginning of a dig operation and uses fluid at an intermediate pressure to rapidly provide fluid to a boom head end cylinder to prevent voiding or cavitation before fluid under high pressure from the main pump can be brought to the cylinder. An on/off fluid switch is activated early in a dig operation to address low pressure at the boom cylinder head end and provide an alternate path for fluid into the cylinder in reaction to the boom being lifted by a motion of the stick and bucket in contact with the work surface.
摘要翻译： 为了避免挖掘循环开始时起重臂气缸头端部的气蚀，来自替代源的流体在由主动臂上升液压回路供给的流体之前或之外被提供给头端。 在一个实施例中，电子液压阀，相关传感器和控制系统确定挖掘操作的开始并且使用中间压力的流体来快速地向动臂头端部气缸提供流体，以防止在高压下的流体之间的空洞或空化 主泵可以带到气缸。 在挖掘操作早期开启/关闭流体开关以解决动臂油缸头端的低压，并提供流体进入气缸的替代路径，以响应于通过杆和铲斗的接触而被提升的动臂被接触 与工作表面。
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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
申请人： Caterpillar Inc.
发明人： Jiao Zhang , Lawrence J. Tognetti , Pengfei Ma , Dayao Chen , John Ferraz, Jr. , Tetsuya Yoshino
CPC分类号： F15B1/027 , F15B1/024 , F15B21/14 , F15B2211/625 , F15B2211/6306 , F15B2211/6313 , F15B2211/7058 , F15B2211/88
摘要： 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.
摘要翻译： 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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