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    System and method for lubricating a cryogenic pump
    1.
    发明授权
    System and method for lubricating a cryogenic pump 有权

    公开(公告)号：US10190556B2

    公开(公告)日：2019-01-29

    申请号：US15401702

    申请日：2017-01-09

    Applicant: Caterpillar Inc.

    Inventor： Joshua T. Perko ,  Dana R. Coldren ,  Glenn B. Cox

    IPC: F02M59/44 ,  F02M21/02

    Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.

    In-Cylinder Dynamic Gas Blending Fuel Injector And Dual Fuel Engine
    4.
    发明申请
    In-Cylinder Dynamic Gas Blending Fuel Injector And Dual Fuel Engine 审中-公开
    气缸动态气体混合燃料喷射器和双燃料发动机

    公开(公告)号：US20150330316A1

    公开(公告)日：2015-11-19

    申请号：US14807947

    申请日：2015-07-24

    Applicant: Caterpillar, Inc.

    Inventor： Dana R. Coldren ,  Cory A. Brown

    IPC: F02D19/06 ,  F02M43/04

    CPC classification number: F02D19/0642 ,  F02D19/0694 ,  F02D19/08 ,  F02D19/10 ,  F02M43/04 ,  F02M45/086 ,  F02M47/027 ,  Y02T10/36

    Abstract: A dual fuel engine utilizes a compression ignited pilot injection of liquid diesel fuel to ignite a mixture of gaseous fuel and air in each engine cylinder. The gaseous fuel is injected at a relatively low pressure directly into the engine cylinder from a fuel injector. The liquid diesel fuel is injected directly into the engine cylinder from the same fuel injector. In-cylinder dynamic gas blending during the compression stroke can reduce potential hydrocarbon slip that could occur when unburned fuel resides in crevice volumes within the engine cylinder.

    Abstract translation: 双燃料发动机利用液化柴油燃料的压缩点火引燃喷射来点燃每个发动机气缸中的气体燃料和空气的混合物。 气体燃料以相对低的压力从燃料喷射器直接喷射到发动机气缸中。 液体柴油由相同的燃料喷射器直接注入发动机气缸。 在压缩冲程期间的缸内动态气体混合可以减少当未燃燃料位于发动机气缸内的缝隙体积时可能发生的潜在碳氢化合物滑移。

    System and Method for Lubricating a Cryogenic Pump
    6.
    发明申请
    System and Method for Lubricating a Cryogenic Pump 审中-公开

    公开(公告)号：US20180195479A1

    公开(公告)日：2018-07-12

    申请号：US15401702

    申请日：2017-01-09

    Applicant: Caterpillar Inc.

    Inventor： Joshua T. Perko ,  Dana R. Coldren ,  Glenn B. Cox

    IPC: F02M59/44 ,  F02M21/02

    CPC classification number: F02M59/44 ,  F02M21/0215 ,  F02M21/0221 ,  F02M21/0227 ,  Y02T10/32

    Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.

    Dual Fuel Common Rail Transient Pressure Control And Engine Using Same
    7.
    发明申请
    Dual Fuel Common Rail Transient Pressure Control And Engine Using Same 有权
    双燃料共轨瞬态压力控制和发动机使用相同

    公开(公告)号：US20140311444A1

    公开(公告)日：2014-10-23

    申请号：US13866303

    申请日：2013-04-19

    Applicant: CATERPILLAR, INC.

    Inventor： Dana R. Coldren ,  Steven Thomas Grant ,  Frank Lombardi ,  Daniel R. Puckett

    IPC: F02D41/00

    CPC classification number: F02D41/0025 ,  F02D19/0605 ,  F02D19/061 ,  F02D19/0694 ,  F02D19/10 ,  F02D41/0027 ,  F02D41/3836 ,  F02D41/3845 ,  F02D41/403 ,  F02D2041/3881 ,  F02D2200/0602

    Abstract: A compression ignition engine is fueled from common rail fuel injectors that predominately inject natural gas fuel that is compression ignited with a small pilot injection of liquid diesel fuel. Before and after a rapid load loss transient, the liquid and gaseous rail pressures are controlled toward respective pressures based upon engine speed and load. During the transient, the liquid rail pressure is controlled relative to the gas rail pressure in order to maintain the liquid rail pressure greater than the gas pressure during the transient to avoid migration gaseous fuel into the liquid fuel side of the system.

    Abstract translation: 压燃式发动机由共轨燃油喷射器燃料，其主要喷射天然气燃料，该天然气燃料通过小型先导式液体柴油燃料喷射被压缩点燃。 在快速负载损耗瞬变之前和之后，基于发动机转速和负载，将液体和气体轨道压力控制到相应的压力。 在瞬态期间，相对于气体轨道压力控制液体轨道压力，以便在瞬态期间保持液体轨道压力大于气体压力，以避免气态燃料进入系统的液体燃料侧。

    GASEOUS COMMON RAIL FUEL SYSTEM AND HIGH COMPRESSION RATIO ENGINE USING SAME
    8.
    发明申请
    GASEOUS COMMON RAIL FUEL SYSTEM AND HIGH COMPRESSION RATIO ENGINE USING SAME 有权
    气体通用燃料系统和使用相同的高压缩比发动机

    公开(公告)号：US20140196686A1

    公开(公告)日：2014-07-17

    申请号：US13739115

    申请日：2013-01-11

    Applicant: CATERPILLAR INC.

    Inventor： Dana R. Coldren ,  Cory A. Brown ,  Martin L. Willi

    IPC: F02B19/12

    CPC classification number: F02B19/12 ,  F02M21/0245 ,  F02M21/0275 ,  F02M21/0281 ,  Y02T10/32

    Abstract: A gaseous fuel engine combines the efficiencies associated with high compression ratio engines with the attractiveness of fueling with natural gas. Each engine cylinder has an associated fuel injector positioned for direct injection and supplied with gaseous fuel from a high pressure common rail. A separate ignition prechamber is also supplied with natural gas and includes an ignition device. Hot gas generated by igniting a mixture of gaseous fuel and air in the prechamber are used to ignite a much larger charge of gaseous fuel injected into the engine cylinder from the fuel injector. The engine has a compression ratio greater than 14: to 1.

    Abstract translation: 气体燃料发动机将与高压缩比发动机相关联的效率与天然气加燃料的吸引力相结合。 每个发动机气缸具有相关联的燃料喷射器，定位用于直接喷射并从高压共轨供应气态燃料。 单独的点火前置机还配有天然气，并包括点火装置。 通过点燃预燃室中的气体燃料和空气的混合物而产生的热气体用于点燃从燃料喷射器喷射到发动机气缸中的更大量的气体燃料。 发动机的压缩比大于14：1。

    Gaseous Fuel System, Direct Injection Gas Engine System, and Method
    9.
    发明申请
    Gaseous Fuel System, Direct Injection Gas Engine System, and Method 审中-公开
    气体燃料系统，直接喷射燃气发动机系统和方法

    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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