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公开(公告)号：US20170037836A1
公开(公告)日：2017-02-09
申请号：US14820326
申请日：2015-08-06
Applicant: Caterpillar Inc.
Inventor： Cory A. Brown , Adrienne M. Brasche , Daniel R. Baldwin , Sudhindra K. Ayanji , Joshua W. Steffen
CPC classification number: F04B15/08 , F04B23/021 , F04B23/023 , F04B37/08 , F04B2015/081 , F17C2227/0142 , F17C2227/0178 , F17C2265/066
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20170030344A1
公开(公告)日：2017-02-02
申请号：US14809861
申请日：2015-07-27
Applicant: Caterpillar Inc.
Inventor： Sunil J. Bean , Alan R. Stockner , Joshua W. Steffen , Cory A. Brown
CPC classification number: F04B49/002 , F04B1/128 , F04B1/146 , F04B1/28 , F04B9/107 , F04B15/08 , F04B49/065 , F04B51/00 , F04B53/14 , G01L23/26
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20160377068A1
公开(公告)日：2016-12-29
申请号：US14753585
申请日：2015-06-29
Applicant: Caterpillar Inc.
Inventor： 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
CPC classification number: F04B23/02 , F04B9/1176 , F04B23/023 , F04B23/06 , F04B37/08 , F04B49/065 , F04B2015/081 , F17C2227/0142
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US10146242B2
公开(公告)日：2018-12-04
申请号：US15246909
申请日：2016-08-25
Applicant: Caterpillar Inc.
Inventor： Joshua W. Steffen , Gregory S. Hasler , Dachuan Yu
Abstract: 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.
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公开(公告)号：US10041484B2
公开(公告)日：2018-08-07
申请号：US14610669
申请日：2015-01-30
Applicant: Caterpillar Inc.
Inventor： Joshua W. Steffen , Sunil J. Bean , Adrienne M. Brasche , Cory A. Brown , Sana Mahmood
Abstract: 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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Patent Agency Ranking
6.发明授权公开(公告)号：US09188069B2
公开(公告)日：2015-11-17
申请号：US13727811
申请日：2012-12-27
Applicant: Caterpillar Inc.
Inventor： Joshua W. Steffen
CPC classification number: F02D19/0647 , F02D19/0623 , F02D19/0684 , F02D19/0689 , F02D19/0694 , F02D19/10 , F02M21/06 , F02M43/04 , F02M47/02 , F02M63/0225 , F02M2200/44 , Y02T10/36
Abstract: The disclosure describes an engine system having liquid and gaseous fuel systems, each of which injects fuel directly into an engine cylinder. A controller controls pumping of a liquefied natural gas (LNG) in the gaseous fuel system. In a pump cycle, a pumping piston is moved in an intake direction over an intake stroke such that the pumping piston produces a negative pressure that draws LNG from a tank fluidly connected to the pumping element into a pumping chamber of a body of the pumping element. The pumping piston is moved in an opposing power direction over a power stroke such that the pumping piston pumps compressed LNG out of the pumping chamber away from the tank. The pumping piston is moved over the intake stroke with an average intake velocity and over the power stroke with an average power velocity, which is greater than the average intake velocity.
Abstract translation: 本公开描述了一种具有液体和气体燃料系统的发动机系统，每个燃料系统将燃料直接喷射到发动机气缸中。 控制器控制气体燃料系统中的液化天然气（LNG）的抽吸。 在泵循环中，泵送活塞在进气行程上沿进气方向移动，使得泵送活塞产生负压，其将LNG从流体连接到泵送元件的罐吸入泵送元件的主体的泵送室 。 泵送活塞在动力冲程上以相反的动力方向移动，使得泵送活塞将压缩的LNG从泵送室泵出远离罐。 抽吸活塞以平均进气速度和功率冲程移动进气行程，平均功率速度大于平均进气速度。
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7.发明申请公开(公告)号：US20140182559A1
公开(公告)日：2014-07-03
申请号：US13730118
申请日：2012-12-28
Applicant: CATERPILLAR INC.
Inventor： Joshua W. Steffen , Dana R. Coldren
IPC: F02M69/04
CPC classification number: F02D19/0647 , F02D19/0694 , F02D19/10 , F02M21/0218 , F02M43/04 , F02M2200/44 , Y02T10/32 , Y02T10/36
Abstract: The disclosure describes an engine system having liquid and gaseous fuel systems, each of which injects fuel directly into an engine cylinder. A controller controls the pumping of a liquefied natural gas (LNG) in the gaseous fuel system using variable speeds for reciprocally moving a pumping piston of a pumping element with a drive assembly. The controller adjustably controls the drive assembly of the pump system to vary a time period for the pump cycle based upon a comparison of a pressure measured in the accumulator and a target pressure condition. When the accumulator pressure satisfies the target pressure condition, the controller is adapted to control the drive assembly such that the pumping element is in a creep mode in which the pumping piston continues to move, but produces no more than a nominal amount of compressed LNG.
Abstract translation: 本公开描述了一种具有液体和气体燃料系统的发动机系统，每个燃料系统将燃料直接喷射到发动机气缸中。 控制器使用可变速度来控制气态燃料系统中的液化天然气（LNG）的泵送，以便使用驱动组件往复移动泵送元件的泵送活塞。 控制器可调节地控制泵系统的驱动组件，以根据在蓄能器中测量的压力与目标压力条件的比较来改变泵循环的时间段。 当蓄能器压力满足目标压力条件时，控制器适于控制驱动组件，使得泵送元件处于泵送活塞继续移动但是不产生不超过标称量的压缩LNG的蠕变模式。
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公开(公告)号：US20140130522A1
公开(公告)日：2014-05-15
申请号：US13675398
申请日：2012-11-13
Applicant: CATERPILLAR INC.
Inventor： Joshua W. Steffen , Alan R. Stockner
IPC: F17C9/02
CPC classification number: F17C9/02 , F02M21/0212 , F02M21/06 , F17C2205/0341 , F17C2221/011 , F17C2221/012 , F17C2221/016 , F17C2221/017 , F17C2221/033 , F17C2221/035 , F17C2223/0153 , F17C2223/0161 , F17C2223/033 , F17C2225/0123 , F17C2225/035 , F17C2227/0135 , F17C2227/0316 , F17C2227/0323 , F17C2227/0393 , F17C2250/01 , F17C2250/043 , F17C2250/0439 , F17C2250/0631 , F17C2250/0636 , F17C2265/066 , F17C2270/0165 , F17C2270/0168 , F17C2270/0171 , F17C2270/0173 , Y02E60/321 , Y02T10/32
Abstract: A conditioning system for a liquefied gas includes a source of liquefied gas, the liquefied gas provided from the source at a first temperature. A first heater is disposed to heat a flow of the liquefied gas to a second temperature. An accumulator is disposed to collect and store a quantity of the liquefied gas at the second temperature. A second heater is disposed to receive a flow of gas from the accumulator and the first heater, the second heater operating to heat the gas to a third temperature and provide the heated gas at the third temperature to a gas outlet.
Abstract translation: 用于液化气的调节系统包括液化气源，在第一温度下从源提供的液化气。 设置第一加热器以将液化气体的流加热到第二温度。 设置蓄能器以在第二温度下收集和存储一定量的液化气体。 第二加热器设置成接收来自蓄能器和第一加热器的气体流，第二加热器操作以将气体加热至第三温度，并将第三温度的加热气体提供给气体出口。
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公开(公告)号：US09989048B2
公开(公告)日：2018-06-05
申请号：US14809861
申请日：2015-07-27
Applicant: Caterpillar Inc.
Inventor： Sunil J. Bean , Alan R. Stockner , Joshua W. Steffen , Cory A. Brown
CPC classification number: F04B49/002 , F04B1/128 , F04B1/146 , F04B1/28 , F04B9/107 , F04B15/08 , F04B49/065 , F04B51/00 , F04B53/14 , G01L23/26
Abstract: 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.
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公开(公告)号：US09915251B2
公开(公告)日：2018-03-13
申请号：US14669259
申请日：2015-03-26
Applicant: Caterpillar Inc.
Inventor： Dana R. Coldren , Joshua W. Steffen
CPC classification number: F04B17/03 , F04B15/08 , F04B23/021 , F04B23/106 , F04B2015/081 , F04D7/02 , F04D13/06 , F04D13/12
Abstract: 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.
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