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1. 发明申请

US20170037836A1 Cryogenic Pump for Liquefied Natural Gas 有权
标题翻译：液化天然气低温泵
公开(公告)号：US20170037836A1
公开(公告)日：2017-02-09
申请号：US14820326
申请日：2015-08-06
申请人： Caterpillar Inc.
发明人： Cory A. Brown , Adrienne M. Brasche , Daniel R. Baldwin , Sudhindra K. Ayanji , Joshua W. Steffen
IPC分类号： F04B15/08 , F04B17/05 , F04B53/16
CPC分类号： F04B15/08 , F04B23/021 , F04B23/023 , F04B37/08 , F04B2015/081 , F17C2227/0142 , F17C2227/0178 , F17C2265/066
摘要： A cryogenic pump for pumping liquefied natural gas (LNG) from a cryogenic tank storing LNG includes a drive assembly and a pump assembly disposed along a pump axis. The drive assembly includes a spool housing having a plurality of spool valves arranged around the pump axis, a tappet housing having a plurality of tappet bores with slidable tappets arranged around the pump axis, and spring housing including a plurality of movably disposed pushrods urged upward by a plurality of associated pushrod springs. Hydraulic fluid received by a hydraulic fluid inlet in the drive assembly is directed by the spool valves to the tappet bores to move the tappets downward against the pushrods. To collect the hydraulic fluid, the lowermost spring housing also includes a collection cavity formed therein that can return the hydraulic fluid to a hydraulic fluid outlet.
摘要翻译：用于从储存LNG的低温罐泵送液化天然气（LNG）的低温泵包括沿泵轴设置的驱动组件和泵组件。所述驱动组件包括具有围绕所述泵轴线布置的多个滑阀的卷轴壳体，具有多个具有围绕所述泵轴线布置的可滑动挺杆的挺杆孔的挺杆壳体，以及弹簧壳体，所述弹簧壳体包括多个可移动地设置的推杆，多个相关的推杆弹簧。由驱动组件中的液压流体入口接收的液压流体由滑阀引导到挺杆孔，以使挺杆向下抵靠推杆。为了收集液压流体，最下面的弹簧壳体还包括其中形成的收集腔，其能够将液压流体返回到液压流体出口。

2. 发明申请

US20170030344A1 End of Stroke Detection for Plunger Velocity Correction 有权
标题翻译：柱塞速度校正的行程检测结束
公开(公告)号：US20170030344A1
公开(公告)日：2017-02-02
申请号：US14809861
申请日：2015-07-27
申请人： Caterpillar Inc.
发明人： Sunil J. Bean , Alan R. Stockner , Joshua W. Steffen , Cory A. Brown
IPC分类号： F04B49/00 , F04B1/14 , G01L23/26 , F04B53/14 , F04B51/00 , F04B1/12 , F04B1/28
CPC分类号： F04B49/002 , F04B1/128 , F04B1/146 , F04B1/28 , F04B9/107 , F04B15/08 , F04B49/065 , F04B51/00 , F04B53/14 , G01L23/26
摘要： A method for controlling a stroke velocity in a pump includes using a sensor to detect a start of a pump stroke and an end of the pump stroke. A stroke time is calculated, the stroke time being a time period between the start of the pump stroke and the end of the pump stroke. The stroke velocity is calculated based on a stroke length and the stroke time. The stroke velocity is compared to a reference stroke velocity. A hydraulic supply pressure to the pump is increased if the calculated stroke velocity is less than the reference stroke velocity, and the hydraulic supply pressure is decreased if the calculated stroke velocity is more than the reference stroke velocity.
摘要翻译：用于控制泵中冲程速度的方法包括使用传感器来检测泵冲程的开始和泵冲程的结束。计算行程时间，行程时间是泵行程开始和泵冲程结束之间的时间段。行程速度根据行程长度和行程时间计算。将行程速度与参考行程速度进行比较。如果计算的行程速度小于参考行程速度，则泵的液压供应压力增加，并且如果计算的行程速度大于参考行程速度，则液压供应压力降低。

3. 发明申请

US20160377068A1 Hydraulic Drive Multi-Element Cryogenic Pump 审中-公开
标题翻译：液压驱动多元件低温泵
公开(公告)号：US20160377068A1
公开(公告)日：2016-12-29
申请号：US14753585
申请日：2015-06-29
申请人： Caterpillar Inc.
发明人： Cory A. Brown , Adrienne M. Brasche , Sunil J. Bean , Shivangini S. Hazari , Sana Mahmood , Nikhil M. Arya , Joshua W. Steffen , Daniel R. Baldwin , Dana R. Coldren , Robert M. Campion , Alan R. Stockner
IPC分类号： F04B15/08 , F04B7/02 , F04B1/12 , F04B1/28 , F04B1/16
CPC分类号： F04B23/02 , F04B9/1176 , F04B23/023 , F04B23/06 , F04B37/08 , F04B49/065 , F04B2015/081 , F17C2227/0142
摘要： A cryogenic fluid pump includes a plurality of pumping elements, each of the plurality of pumping elements having an actuator portion that is associated with and configured to selectively activate one end of a pushrod in response to a command by an electronic controller, an activation portion associated with an opposite end of the pushrod, and a pumping portion associated with the activation portion. For each of the plurality of pumping elements, the pumping portion is activated for pumping a fluid by the activation portion, which activation portion is activated by the actuator portion. The electronic controller is configured to selectively activate each of the plurality of pumping elements such that a flow of fluid from the cryogenic fluid pump results from continuous activations of the plurality of pumping elements at selected dwell times between activations of successive pumping elements.
摘要翻译：低温流体泵包括多个泵送元件，所述多个泵送元件中的每一个具有致动器部分，所述致动器部分响应于电子控制器的命令而相关联并且被配置为选择性地激活推杆的一端，激活部分相关联其具有推杆的相对端，以及与激活部分相关联的泵送部分。对于多个泵送元件中的每一个，泵送部分被启动，用于通过致动部分泵送流体，该致动部分由致动器部分激活。电子控制器被配置为选择性地激活多个泵送元件中的每一个，使得来自低温流体泵的流体流由连续泵送元件的激活之间选定的停留时间的多个泵送元件的连续激活产生。

4. 发明授权

US09989048B2 End of stroke detection for plunger velocity correction 有权
公开(公告)号：US09989048B2
公开(公告)日：2018-06-05
申请号：US14809861
申请日：2015-07-27
申请人： Caterpillar Inc.
发明人： Sunil J. Bean , Alan R. Stockner , Joshua W. Steffen , Cory A. Brown
IPC分类号： F04B49/00 , F04B1/12 , F04B1/14 , F04B1/28 , F04B53/14 , F04B51/00 , G01L23/26
CPC分类号： F04B49/002 , F04B1/128 , F04B1/146 , F04B1/28 , F04B9/107 , F04B15/08 , F04B49/065 , F04B51/00 , F04B53/14 , G01L23/26
摘要： A method for controlling a stroke velocity in a pump includes using a sensor to detect a start of a pump stroke and an end of the pump stroke. A stroke time is calculated, the stroke time being a time period between the start of the pump stroke and the end of the pump stroke. The stroke velocity is calculated based on a stroke length and the stroke time. The stroke velocity is compared to a reference stroke velocity. A hydraulic supply pressure to the pump is increased if the calculated stroke velocity is less than the reference stroke velocity, and the hydraulic supply pressure is decreased if the calculated stroke velocity is more than the reference stroke velocity.

5. 发明授权

US09915251B2 Fuel system having serially arranged in-tank pumps 有权
公开(公告)号：US09915251B2
公开(公告)日：2018-03-13
申请号：US14669259
申请日：2015-03-26
申请人： Caterpillar Inc.
发明人： Dana R. Coldren , Joshua W. Steffen
IPC分类号： F04B23/14 , F04D13/06 , F04B17/03 , F04D7/02 , F04D13/12 , F04B23/02 , F04B23/10 , F04B15/08
CPC分类号： F04B17/03 , F04B15/08 , F04B23/021 , F04B23/106 , F04B2015/081 , F04D7/02 , F04D13/06 , F04D13/12
摘要： A pump system is disclosed for use with a fuel system of an engine. The pump system may have a first pump with a first end, a second end, a reservoir located at the second end, and at least one pump mechanism configured to receive fluid from the reservoir. The pump system may also have a second pump mounted to the first pump at the second end and having at least one pump mechanism configured to discharge fluid into the reservoir of the first pump. The pump system may further have a mechanical input operatively connected to the at least one pump mechanism of each of the first and second pumps.

6. 发明申请

US20160377041A1 Multiple Element Firing Strategy for Cryogenic Pump 有权
标题翻译：低温泵多元件燃烧策略
公开(公告)号：US20160377041A1
公开(公告)日：2016-12-29
申请号：US14753613
申请日：2015-06-29
申请人： Caterpillar Inc.
发明人： Joshua W. Steffen , Sunil J. Bean
IPC分类号： F02M59/10
CPC分类号： F02D19/0644 , F02D19/0684 , F02D19/0694 , F02D19/10 , F02D41/0027 , F02D41/3845 , F02D2041/3881 , F02D2200/0602 , Y02T10/36
摘要： A pump has a plurality of pumping elements, each being independently responsive to an actuation signal from a controller. The controller is programmed to maintain a desired pressure at the pump discharge, monitor the fluid pressure at the pump discharge, compare the fluid pressure with the desired fluid pressure to determine a pressure error, provide commands to sequentially actuate the pumping elements when the pressure error is within a threshold range, and provide commands to actuate more than one of the plurality of pumping elements simultaneously, such that more than one pumped amounts of fluid are delivered simultaneously at the pump discharge, when the pressure error droops outside of the threshold range.
摘要翻译：泵具有多个泵送元件，每个泵送元件独立地响应于来自控制器的致动信号。控制器被编程为在泵排出时保持期望的压力，监测泵出口处的流体压力，将流体压力与期望的流体压力进行比较以确定压力误差，提供当压力误差时依次致动泵送元件的命令并且提供用于同时致动多于一个泵送元件的命令，使得当压力误差下降到阈值范围之外时，在泵排出时同时输送多于一个的泵送量的流体。

7. 发明授权

US08936009B2 Fuel system having dual fuel pressure regulator 有权
标题翻译：具有双燃料压力调节器的燃油系统
公开(公告)号：US08936009B2
公开(公告)日：2015-01-20
申请号：US13665534
申请日：2012-10-31
申请人： Caterpillar Inc.
发明人： Daniel R. Puckett , Joshua W. Steffen , Frank J. Lombardi , Steven T. Grant
IPC分类号： F02M21/02
CPC分类号： F02D19/10 , F02D19/0673 , Y02T10/36 , Y10T137/0379 , Y10T137/7782 , Y10T137/7793
摘要： A pressure regulator is disclosed having a body, a valve seat dividing a cavity of the body into first and second portions, and an end stop movable against a bias to selectively engage the valve seat and isolate the first and second portions. The pressure regulator may also have a first inlet port in the first portion, a first outlet port in the second portion and in fluid communication with the first portion via the valve seat, and a second inlet port in the second portion. The fuel system may also have a valve element in the second portion and movable against a spring bias based on a pressure difference between an open position and a restricted position against the end stop. The fuel system may additionally have an actuator biased to urge the valve element toward the second position and selectively actuated to move away from the valve element.
摘要翻译：公开了一种压力调节器，其具有主体，阀体将主体的空腔分成第一和第二部分，以及端部止动件，其可抵抗偏压移动，以选择性地接合阀座并隔离第一和第二部分。压力调节器还可以具有第一部分中的第一入口端口，第二部分中的第一出口端口，并且经由阀座部与第一部分流体连通，以及第二部分中的第二入口端口。燃料系统还可以在第二部分中具有阀元件，并且可基于相对于端部止挡件的打开位置和限制位置之间的压力差抵抗弹簧偏压运动。燃料系统可以另外具有偏压的致动器，以将阀元件推向第二位置并且被选择性地致动以远离阀元件移动。

8. 发明申请

US20140130778A1 METHOD OF OPERATING ENGINE 审中-公开
标题翻译：运行发动机的方法
公开(公告)号：US20140130778A1
公开(公告)日：2014-05-15
申请号：US14159831
申请日：2014-01-21
申请人： Caterpillar Inc.
发明人： Daniel R. Puckett , Steven T. Grant , Joshua W. Steffen , Benjamin A. Nash
IPC分类号： F02M39/00
CPC分类号： F02M43/00 , F02D19/022 , F02D19/0647 , F02D41/0025 , F02D2200/06 , F02D2250/18 , F02M21/0215 , F02M21/0221 , F02M21/0245 , F02M21/06 , Y02T10/32 , Y02T10/36
摘要： A method of operating an engine is disclosed. The method includes estimating an operational status of a cryogenic pump selectively driven by the engine. The cryogenic pump is configured to pressurize a liquefied gaseous fuel. The method also includes estimating a power requirement of the cryogenic pump. The method further includes determining whether the engine is operating on a lug curve. Moreover, the method includes providing additional fuel to the engine in order to increase an engine power beyond the lug curve prior to an operation of the cryogenic pump. The increase in engine power is at least equal to the power requirement of the cryogenic pump.
摘要翻译：公开了一种操作发动机的方法。该方法包括估计由发动机选择性驱动的低温泵的操作状态。低温泵构造成对液化的气态燃料加压。该方法还包括估计低温泵的功率需求。该方法还包括确定发动机是否在凸耳曲线上操作。此外，该方法包括向发动机提供额外的燃料，以便在低温泵的操作之前增加引擎功率超过凸耳曲线。发动机功率的增加至少等于低温泵的功率要求。

9. 发明授权

US10146242B2 Micro grid power system 有权
公开(公告)号：US10146242B2
公开(公告)日：2018-12-04
申请号：US15246909
申请日：2016-08-25
申请人： Caterpillar Inc.
发明人： Joshua W. Steffen , Gregory S. Hasler , Dachuan Yu
IPC分类号： G05F1/66 , H02K7/18 , H02J3/38 , H02J3/46 , G05B23/02
摘要： A micro grid power system includes a plurality of generator sets, a photovoltaic system, an external load, and a controller. Each generator set includes an engine and a sensor to determine a temperature of exhaust gases exiting the engine. The photovoltaic system includes a plurality of photovoltaic panels for generating power. The external load is powered by the plurality of generator sets and the photovoltaic system. The controller is configured to determine the external load, and control the plurality of generator sets to maintain the temperature above a threshold temperature. The controller is further configured to determine a remaining load which is the external load subtracted by a portion of the external load powered by the plurality of generator sets, and control the photovoltaic system to power the remaining load.

10. 发明授权

US10041484B2 Pump having inlet reservoir with vapor-layer standpipe 有权
公开(公告)号：US10041484B2
公开(公告)日：2018-08-07
申请号：US14610669
申请日：2015-01-30
申请人： Caterpillar Inc.
发明人： Joshua W. Steffen , Sunil J. Bean , Adrienne M. Brasche , Cory A. Brown , Sana Mahmood
IPC分类号： F04B23/02 , F04B15/08 , F04B37/08 , F04B53/16 , F04B53/14
摘要： A pump is disclosed having a manifold with an inlet, a pressure outlet, and a return outlet. The pump may also have a jacket connected to an end of the manifold to create an enclosure that is in fluid communication with the inlet of the manifold, and at least one pumping mechanism extending from the manifold into the jacket. The at least one pumping mechanism may have an inlet open to the enclosure and an outlet in communication with the pressure outlet of the manifold. The pump may further have a standpipe extending from the manifold into the enclosure. The standpipe may be in communication with the return outlet of the manifold.

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