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    Dual Fuel Engine Diagnostic System And Method Of Operating Same
    11.
    发明申请
    Dual Fuel Engine Diagnostic System And Method Of Operating Same 审中-公开
    双燃料发动机诊断系统及其操作方法相同

    公开(公告)号：US20140331964A1

    公开(公告)日：2014-11-13

    申请号：US13890671

    申请日：2013-05-09

    Applicant: Caterpillar, Inc.

    Inventor： Steven Thomas Grant ,  Frank Lombardi ,  Daniel R. Puckett ,  Alan R. Stockner

    IPC: F02D19/06 ,  F02M43/00

    CPC classification number: F02D19/0602 ,  F02D19/0605 ,  F02D19/0623 ,  F02D19/0628 ,  F02D19/0647 ,  F02D19/0681 ,  F02D19/0694 ,  F02D19/10 ,  F02M43/00 ,  Y02T10/36

    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. Prior to servicing the engine, a service tool may establish a communication link with an electronic controller that controls operation of the engine. Pressure information for a gaseous fuel common rail and a liquid fuel common rail are displayed with the service tool, when the engine is stopped, in order to determine whether the rails are completely depressurized indicating that it is then o.k. to perform servicing tasks.

    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。 在维修发动机之前，服务工具可以建立与控制发动机运行的电子控制器的通信链路。 当发动机停止时，与维修工具一起显示用于气体燃料共轨和液体燃料共轨的压力信息，以便确定轨道是否被完全减压，从而指示其然后是o.k。 执行维修任务。

    Systems and methods for resetting a pressure relief valve of a common rail fuel system
    12.
    发明授权
    Systems and methods for resetting a pressure relief valve of a common rail fuel system 有权

    公开(公告)号：US12247526B2

    公开(公告)日：2025-03-11

    申请号：US18333453

    申请日：2023-06-12

    Applicant: Caterpillar Inc.

    Inventor： Michael E. Sattler ,  Daniel R. Puckett ,  Bradley S. Bashore

    IPC: F02D41/38 ,  F02M55/02 ,  F02M59/44 ,  F02M59/46

    Abstract: According to one aspect of the present disclosure, a method of controlling a common rail fuel system of an engine system is provided. The common rail fuel system includes a fuel pump, a fuel rail, a plurality of fuel injectors, and a pressure-responsive relief valve fluidly coupled to the fuel rail. The method comprises identifying a pressure condition of the fuel rail indicative of the pressure-responsive relief valve being in an open and latched condition, the identification being based on detecting a rise and reduction in rail pressure within a threshold time period. The method further comprises terminating flow from the fuel pump, while the common rail fuel system is operating, to unlatch and close the pressure-responsive relief valve.

    PUMP HEALTH ASSESSMENT SYSTEM
    13.
    发明申请
    PUMP HEALTH ASSESSMENT SYSTEM 有权

    公开(公告)号：US20220163010A1

    公开(公告)日：2022-05-26

    申请号：US17102524

    申请日：2020-11-24

    Applicant: Caterpillar Inc.

    Inventor： Daniel R. Puckett ,  Bradley S. Bashore

    IPC: F02M65/00 ,  G01M15/09

    Abstract: A pump health assessment system and a method for providing a pump health of a pump is disclosed. The method includes: determining that there is an imbalance in the pump; increasing pump flow from the pump; measuring a rail pressure of a fuel rail; determining if the rail pressure is substantially equal to an expected rail pressure profile; and in accordance with a determination that the rail pressure is not substantially equal to the rail pressure profile, outputting an indication of pump damage.

    Method and system for monitoring injector valves
    14.
    发明授权
    Method and system for monitoring injector valves 有权

    公开(公告)号：US11313338B1

    公开(公告)日：2022-04-26

    申请号：US16953900

    申请日：2020-11-20

    Applicant: Caterpillar Inc.

    Inventor： Andrew O. Marrack ,  Daniel R. Puckett ,  Kranti K. Nellutla ,  Dustin K. Fee

    IPC: F02M61/04 ,  F02M51/06 ,  F02D41/34 ,  F02D41/20

    Abstract: A method for controlling a fuel injector includes applying a spill valve current, applying a control valve current, the control and spill valves including components in electrical communication with each other, and detecting a timing at which the spill valve returns to an open position based on induced spill valve current. The method includes detecting a timing at which the control valve returns to a resting position based on induced control valve current, the induced spill valve current and the induced control valve current being included in respective freewheeling currents that at least partially overlap each other, adjusting a spill valve current that is applied during an injection, based on the detected spill valve return timing, and adjusting a control valve current that is applied during the injection, based on the detected control valve return timing.

    DIAGNOSING FAULT IN COMMON RAIL FUEL SYSTEM
    16.
    发明申请
    DIAGNOSING FAULT IN COMMON RAIL FUEL SYSTEM 审中-公开
    在通用燃油系统中诊断故障

    公开(公告)号：US20170009693A1

    公开(公告)日：2017-01-12

    申请号：US15260818

    申请日：2016-09-09

    Applicant: Caterpillar Inc.

    Inventor： Nandagopal Methil ,  Daniel R. Puckett

    IPC: F02D41/22 ,  F02D41/30 ,  F02D41/14 ,  F02M55/02 ,  F02M63/02

    CPC classification number: F02D41/221 ,  F02D41/1401 ,  F02D41/1477 ,  F02D41/3082 ,  F02D41/3854 ,  F02D41/3863 ,  F02D2041/1409 ,  F02D2041/142 ,  F02D2041/225 ,  F02M55/025 ,  F02M63/005 ,  F02M63/0225 ,  F02M63/025 ,  F02M65/006

    Abstract: A method of diagnosing a fault in a common rail fuel system having a proportional-integral-derivative (PID) controller includes determining a first integral output corresponding to a first fuel flow condition and a first rail pressure setting. The method includes comparing the first integral output with a threshold integral output and determining a second integral output corresponding to a second fuel flow condition and the first rail pressure setting, when the first integral output is greater than the threshold integral output. The method includes determining a third integral output corresponding to the first fuel flow condition and a second rail pressure setting, when the first integral output is greater than the threshold integral output. The method includes identifying a failure in at least one of a flow control valve arrangement and a pressure relief valve of the common rail fuel system based on the first, second, and the third integral outputs.

    Abstract translation: 一种用于诊断具有比例积分微分（PID）控制器的共轨燃料系统中的故障的方法，包括确定与第一燃料流量状况和第一轨道压力设定相对应的第一积分输出。 该方法包括：当第一积分输出大于阈值积分输出时，将第一积分输出与阈值积分输出进行比较，并确定对应于第二燃料流量条件和第一轨道压力设定的第二积分输出。 该方法包括当第一积分输出大于阈值积分输出时，确定对应于第一燃料流量状况的第三积分输出和第二轨道压力设置。 该方法包括基于第一，第二和第三积分输出识别共轨燃料系统的流量控制阀装置和压力释放阀中的至少一个的故障。

    DIAGNOSING FAULT IN COMMON RAIL FUEL SYSTEM
    18.
    发明申请
    DIAGNOSING FAULT IN COMMON RAIL FUEL SYSTEM 审中-公开
    在通用燃油系统中诊断故障

    公开(公告)号：US20150106040A1

    公开(公告)日：2015-04-16

    申请号：US14055271

    申请日：2013-10-16

    Applicant: Caterpillar Inc.

    Inventor： Nandagopal Methil ,  Daniel R. Puckett

    IPC: F02M65/00

    CPC classification number: F02D41/221 ,  F02D41/1401 ,  F02D41/1477 ,  F02D41/3082 ,  F02D41/3854 ,  F02D41/3863 ,  F02D2041/1409 ,  F02D2041/142 ,  F02D2041/225 ,  F02M55/025 ,  F02M63/005 ,  F02M63/0225 ,  F02M63/025 ,  F02M65/006

    Abstract: A method of diagnosing a fault in a common rail fuel system having a proportional-integral-derivative (PID) controller includes determining a first integral output corresponding to a first fuel flow condition and a first rail pressure setting. The method includes comparing the first integral output with a threshold integral output and determining a second integral output corresponding to a second fuel flow condition and the first rail pressure setting, when the first integral output is greater than the threshold integral output. The method includes determining a third integral output corresponding to the first fuel flow condition and a second rail pressure setting, when the first integral output is greater than the threshold integral output. The method includes identifying a failure in at least one of a flow control valve arrangement and a pressure relief valve of the common rail fuel system based on the first, second, and the third integral outputs.

    Abstract translation: 一种用于诊断具有比例积分微分（PID）控制器的共轨燃料系统中的故障的方法，包括确定与第一燃料流量状况和第一轨道压力设定相对应的第一积分输出。 该方法包括：当第一积分输出大于阈值积分输出时，将第一积分输出与阈值积分输出进行比较，并确定对应于第二燃料流量条件和第一轨道压力设定的第二积分输出。 该方法包括当第一积分输出大于阈值积分输出时，确定对应于第一燃料流量状况的第三积分输出和第二轨道压力设置。 该方法包括基于第一，第二和第三积分输出识别共轨燃料系统的流量控制阀装置和压力释放阀中的至少一个的故障。

    VALVE ARRIVAL TIME DETECTION IN FUEL SYSTEM HAVING DUAL SOLENOID OPERATED VALVES
    19.
    发明申请
    VALVE ARRIVAL TIME DETECTION IN FUEL SYSTEM HAVING DUAL SOLENOID OPERATED VALVES 有权

    公开(公告)号：US20250020095A1

    公开(公告)日：2025-01-16

    申请号：US18352563

    申请日：2023-07-14

    Applicant: Caterpillar Inc.

    Inventor： Mitchell B. Juchems ,  Daniel R. Puckett ,  Andrew O. Marrack

    IPC: F02M51/06 ,  F02D41/40 ,  F02M65/00

    Abstract: Operating a fuel injector in a fuel system for an engine includes energizing a first solenoid actuator to move a spill valve from a first position to a second, closed position, and energizing a second solenoid actuator to move a fuel injection valve in the fuel injector from a closed position to an open position. A pull-in tier of a waveform energizing the second solenoid actuator is generated via a first current produced by a boosted voltage power supply and a second current produced by a lower voltage power supply. Arrival timing of the valve at the open position is detected based on a property of the second current, such that a valve arrival timing error may be used to trim the fuel injector. Related methodology and control logic is also disclosed.

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