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    CIRCUIT FOR DETECTING FAULT IN FUEL INJECTION SYSTEM
    2.
    发明申请
    CIRCUIT FOR DETECTING FAULT IN FUEL INJECTION SYSTEM 审中-公开
    用于检测燃油喷射系统故障的电路

    公开(公告)号：US20160265498A1

    公开(公告)日：2016-09-15

    申请号：US15157662

    申请日：2016-05-18

    Applicant: Caterpillar Inc.

    Inventor： Daniel Puckett ,  William Eugene Hoban, JR.

    IPC: F02M51/06 ,  G01R31/02 ,  G01R31/00

    CPC classification number: G01R31/025 ,  F02D41/20 ,  F02D41/221 ,  F02D2041/2058 ,  F02D2041/2093 ,  G01R31/007

    Abstract: A driver circuit for a fuel injector is provided. The fuel injector is connected to an Engine Control Module (ECM) having a high-side terminal and a low-side terminal. The driver circuit includes a fault detection system for detecting a short-to-ground fault. The fault detection system includes a first module to measure a forward current flowing through the high-side terminal of the ECM and a second module to measure a return current flowing through the low-side terminal of the ECM. Further, the fault detection system includes a third module to compute a differential current based on the forward current and the return current. The fault detection system includes a fourth module to compare the differential current with a threshold current, and trigger a fault and interrupt the flow of the forward current when the differential current is greater than the threshold current.

    Abstract translation: 提供了一种用于燃料喷射器的驱动电路。 燃料喷射器连接到具有高侧端子和低侧端子的发动机控制模块（ECM）。 驱动电路包括用于检测短路对地故障的故障检测系统。 该故障检测系统包括：第一模块，用于测量流过ECM的高侧端子的正向电流;以及第二模块，用于测量流经ECM的低侧端子的回流电流。 此外，故障检测系统包括基于正向电流和返回电流来计算差分电流的第三模块。 故障检测系统包括将差分电流与阈值电流进行比较的第四模块，并且当差动电流大于阈值电流时触发故障并中断正向电流的流动。

    Dual Fuel Common Rail Depressurization During Engine Shutdown And Machine Using Same
    3.
    发明申请
    Dual Fuel Common Rail Depressurization During Engine Shutdown And Machine Using Same 有权
    发动机关闭期间的双燃料共轨减压和使用相同的机器

    公开(公告)号：US20140316677A1

    公开(公告)日：2014-10-23

    申请号：US13866110

    申请日：2013-04-19

    Applicant: Caterpillar, Inc.

    Inventor： Alan R. Stockner ,  Nandagopal Methil ,  Daniel Puckett

    IPC: F02D41/00

    CPC classification number: F02D41/0025 ,  F02D19/0605 ,  F02D19/061 ,  F02D19/0694 ,  F02D19/10 ,  F02D41/0027 ,  F02D41/008 ,  F02D41/042 ,  F02D41/3094 ,  F02D41/3863 ,  F02D41/401 ,  F02D2200/0602 ,  F02M43/00 ,  F02M55/002 ,  F02M55/02 ,  F02M63/026 ,  F02M63/0295 ,  Y02T10/36

    Abstract: A machine includes a compression ignition engine 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. When an engine shutdown command is communicated to an electronic controller, the supply of gaseous fuel to the gas rail is stopped and the gaseous fuel common rail is depressurized by continuing to run the engine and inject gaseous and liquid fuels while commanding a liquid pressure greater than the gas pressure. After the gas rail pressure has achieved an acceptable shutdown pressure, the engine is stopped. The gas rail pressure is then reduced to atmospheric pressure followed by the liquid fuel common rail being reduced to atmosphere pressure after stopping the engine.

    Abstract translation: 一种机器包括由共轨燃料喷射器燃料的压燃式发动机，其主要是喷射天然气燃料，该天然气燃料通过小型先导式液体柴油燃料喷射而被压缩点燃。 当发动机关闭指令传送到电子控制器时，停止向气轨供应气体燃料，并通过继续运行发动机并喷射气体和液体燃料同时控制气体燃料共轨的液压大于 气压。 在气轨压力达到可接受的停机压力之后，发动机停止。 然后将气轨压力降低到大气压力，随后液体燃料共轨在停止发动机后减小到大气压力。

    Variable Retraction Rate Pump and Method for Operating Same
    4.
    发明申请
    Variable Retraction Rate Pump and Method for Operating Same 有权
    可变回缩泵和操作方法相同

    公开(公告)号：US20160138583A1

    公开(公告)日：2016-05-19

    申请号：US14534660

    申请日：2014-11-06

    Applicant: Caterpillar Inc.

    Inventor： Paul Desiderio ,  Daniel Puckett ,  Steven Grant ,  Joshua Steffen

    IPC: F04B49/20 ,  F04B23/02 ,  G05B15/02 ,  F04B53/16 ,  F15B1/26 ,  F15B11/08 ,  F04B19/22 ,  F04B53/14

    CPC classification number: F04B49/20 ,  F02D19/0605 ,  F02D19/0613 ,  F02D19/08 ,  F04B19/22 ,  F04B23/02 ,  F04B53/14 ,  F04B53/16 ,  Y02T10/36

    Abstract: A pump system includes a pump and a storage volume in fluid communication with a discharge port of the pump. The pump includes a housing defining a pump bore and a pump piston disposed in sliding engagement with the pump bore, the pump piston being in selective fluid communication with the discharge port of the pump. A method for operating the pump system includes determining a time to drain an amount of a first fluid from the storage volume, and retracting the pump piston within the pump bore at a target retraction rate based at least partly on the time to drain the first fluid from the storage volume.

    Abstract translation: 泵系统包括泵和与泵的排出口流体连通的存储容积。 泵包括限定泵孔的壳体和与泵孔滑动接合的泵活塞，泵活塞与泵的排出口选择性地流体连通。 用于操作泵系统的方法包括确定从存储容积排出一定量的第一流体的时间，以及至少部分地基于时间排出第一流体的时间以目标回缩速率缩回泵孔内的泵活塞 从存储卷。

    Fault Diagnostic Strategy For Common Rail Fuel System
    5.
    发明申请
    Fault Diagnostic Strategy For Common Rail Fuel System 审中-公开
    共轨燃油系统故障诊断策略

    公开(公告)号：US20140238352A1

    公开(公告)日：2014-08-28

    申请号：US13774141

    申请日：2013-02-22

    Applicant: CATERPILLAR, INC.

    Inventor： Nandagopal Methil ,  Daniel Puckett

    IPC: F02M69/50

    CPC classification number: F02M69/50 ,  F02D41/22 ,  F02D41/3845 ,  F02D2041/1432 ,  F02D2041/224 ,  F02D2200/0602

    Abstract: An electronic controller for a common rail fuel system detects a fault when a time sum accumulated error exceeds a threshold. The time sum accumulated error is left unchanged when the operating condition is transient, and either adds to or subtracts from the time sum accumulated error responsive to a rail pressure error and the operating condition being steady state.

    Abstract translation: 用于共轨燃料系统的电子控制器在时间累积误差超过阈值时检测故障。 当运行状态为瞬态时，累加误差保持不变，并且根据轨道压力误差和运行状态为稳定状态，从时间和积累误差中加或减。

    DUAL FUEL COMMON RAIL SYSTEM AND METHOD OF TRANSITIONING FROM DIESEL ONLY TO DUAL FUEL METHOD OF OPERATION
    6.
    发明申请
    DUAL FUEL COMMON RAIL SYSTEM AND METHOD OF TRANSITIONING FROM DIESEL ONLY TO DUAL FUEL METHOD OF OPERATION 有权
    双燃料通用铁路系统和从柴油转运到双燃料运行方法的方法

    公开(公告)号：US20140188372A1

    公开(公告)日：2014-07-03

    申请号：US13732619

    申请日：2013-01-02

    Applicant: CATERPILLAR INC.

    Inventor： Daniel Puckett ,  Steven Thomas Grant ,  Frank Lombardi

    IPC: F02D19/06

    CPC classification number: F02D19/0615 ,  F02D19/061 ,  F02D19/0623 ,  F02D19/0684 ,  F02D19/0694 ,  F02D19/105 ,  F02M21/0281 ,  F02M63/0063 ,  F02M63/029 ,  Y02T10/32 ,  Y02T10/36

    Abstract: A dual fuel common rail system may be operated in a regular mode in which a relatively large charge of gaseous fuel is ignited by compression igniting a relatively small injection quantity of liquid diesel fuel. The dual fuel system may be operated in a single fuel limp home mode in which liquid diesel fuel is injected at higher pressures. When transitioning from the single fuel limp home mode to the dual fuel regular mode, accumulated leaked liquid fuel in the gaseous nozzle chamber of each fuel injector is purged and burned in the respective engine cylinder.

    Abstract translation: 双燃料共轨系统可以以常规模式操作，其中相对较大量的气体燃料通过压缩点燃，点燃相对较小量的液体柴油燃料。 双燃料系统可以在单一燃料跛行家庭模式中操作，其中液体柴油燃料在较高压力下喷射。 当从单一燃料跛行家庭模式转换到双重燃料正常模式时，每个燃料喷射器的气体喷嘴室中累积的泄漏的液体燃料在相应的发动机气缸中被清除和燃烧。

    Dual fuel system and engine system operating method
    9.
    发明授权
    Dual fuel system and engine system operating method 有权
    双燃料系统和发动机系统运行方式

    公开(公告)号：US09279391B2

    公开(公告)日：2016-03-08

    申请号：US13868339

    申请日：2013-04-23

    Applicant: Caterpillar Inc.

    Inventor： Dianqi Fang ,  Daniel Puckett

    IPC: F02M43/04 ,  F02M21/02 ,  F02D19/06 ,  F02D19/10 ,  F02M47/02 ,  F02M55/00 ,  F02M55/02 ,  F02M63/02 ,  F02M63/00

    CPC classification number: F02M21/0284 ,  F02D19/0621 ,  F02D19/0647 ,  F02D19/0694 ,  F02D19/105 ,  F02M21/0281 ,  F02M43/04 ,  F02M47/027 ,  F02M55/002 ,  F02M55/02 ,  F02M63/0019 ,  F02M63/0064 ,  F02M63/0295 ,  F02M2200/44 ,  Y02T10/32 ,  Y02T10/36

    Abstract: A dual fuel system for an internal combustion engine includes a gaseous fuel subsystem and a liquid fuel subsystem. A plurality of fuel injectors each define a gaseous fuel passage fluidly connected to a gaseous fuel manifold of the gaseous fuel subsystem, a liquid fuel passage fluidly connected to a liquid fuel manifold of the liquid fuel subsystem, and a liquid fuel leak path from the liquid fuel passage to the gaseous fuel passage. A liquid fuel purging mechanism includes a drain conduit and at least one valve positioned fluidly between the drain conduit and the gaseous fuel manifold, and being adjustable to fluidly connect the drain conduit to the gaseous fuel manifold, to drain leaked liquid fuel to a low pressure outlet.

    Abstract translation: 用于内燃机的双燃料系统包括气体燃料子系统和液体燃料子系统。 多个燃料喷射器各限定一个气体燃料通道，其流体地连接到气体燃料子系统的气体燃料歧管，流体连接到液体燃料子系统的液体燃料歧管的液体燃料通道，以及来自液体的液体燃料泄漏路径 燃料通向气体燃料通道。 液体燃料清除机构包括排水管道和至少一个阀，其位于排水管道和气体燃料歧管之间流体流动，并且可调节以将排水管道流体连接到气体燃料歧管，以将泄漏的液体燃料排出到低压 出口。

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