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    Methods for measuring fuel quantity during multipulse fuel injection events in a common rail fuel system
    2.
    发明授权
    Methods for measuring fuel quantity during multipulse fuel injection events in a common rail fuel system 有权

    公开(公告)号：US12146451B2

    公开(公告)日：2024-11-19

    申请号：US18513778

    申请日：2023-11-20

    Applicant: Cummins Inc.

    Inventor： David Michael Carey ,  Sanjay Manglam

    IPC: F02D41/40 ,  F02D41/20 ,  F02D41/38 ,  F02M65/00 ,  F02D41/22

    Abstract: Various embodiments of the present disclosure relate to methods and systems for measuring an injected fuel quantity during multipulse injection events in a common rail of a fuel system including a fuel pump to supply fuel to the common rail. The method, using a control unit, determines if each of the multipulse injection events in a normal operating condition includes a pilot pulse; in response to determining that the pilot pulse is included, obtaining an enforced separation value between the pilot pulse and the main pulse to emulate a single-pulse injection; while the fuel pump is temporarily shut off, performing a temporary enforced separation on a fraction of the multipulse injection events; measuring a pressure change in the common rail during the temporary enforced separation; and resuming the normal operating condition of the multipulse injection events after the pressure change is measured.

    METHODS FOR MEASURING FUEL QUANTITY DURING MULTIPULSE FUEL INJECTION EVENTS IN A COMMON RAIL FUEL SYSTEM
    3.
    发明公开
    METHODS FOR MEASURING FUEL QUANTITY DURING MULTIPULSE FUEL INJECTION EVENTS IN A COMMON RAIL FUEL SYSTEM 审中-公开

    公开(公告)号：US20230279823A1

    公开(公告)日：2023-09-07

    申请号：US17790430

    申请日：2020-12-30

    Applicant: Cummins Inc.

    Inventor： David Michael Carey ,  Sanjay Manglam

    IPC: F02D41/40 ,  F02D41/20 ,  F02D41/38

    CPC classification number: F02D41/403 ,  F02D41/405 ,  F02D41/20 ,  F02D41/3818 ,  F02D2200/0602

    Abstract: Various embodiments of the present disclosure relate to methods and systems for measuring an injected fuel quantity during multipulse injection events in a common rail of a fuel system including a fuel pump to supply fuel to the common rail. The method, using a control unit, determines if each of the multipulse injection events in a normal operating condition includes a pilot pulse, in response to determining that the pilot pulse is included, obtaining an enforced separation value between the pilot pulse and the main pulse to emulate a single-pulse injection; while the fuel pump is temporarily shut off, performing a temporary enforced separation on a fraction of the multipulse injection events; measuring a pressure change in the common rail during the temporary enforced separation; and resuming the normal operating condition of the multipulse injection events after the pressure change is measured.

    System and method for estimating high-pressure fuel leakage in a common rail fuel system
    6.
    发明授权
    System and method for estimating high-pressure fuel leakage in a common rail fuel system 有权
    用于估计共轨燃油系统中的高压燃油泄漏的系统和方法

    公开(公告)号：US09470167B2

    公开(公告)日：2016-10-18

    申请号：US15004637

    申请日：2016-01-22

    Applicant: CUMMINS INC.

    Inventor： David M. Carey ,  Donald J. Benson ,  Sanjay Manglam ,  Paul V. Moonjelly

    IPC: F02M1/00 ,  F02D41/22 ,  F02D41/38 ,  F02M47/02 ,  F02M65/00 ,  F02M55/02 ,  F02D41/28

    CPC classification number: F02D41/22 ,  F02D41/3845 ,  F02D2041/225 ,  F02D2041/286 ,  F02D2200/0602 ,  F02D2200/0606 ,  F02M47/02 ,  F02M55/025 ,  F02M65/006

    Abstract: A system and method for measuring fuel pressure decreases in a fuel accumulator of an internal combustion engine is provided. The system includes the ability to stop a fuel flow to a fuel accumulator of the engine. Pressure signals are transmitted to a control system of the engine until the fuel pressure in the fuel accumulator drops by a predetermined amount, at which time fuel flow is re-enabled. The pressure signals are then analyzed to determine the amount or quantity of fuel delivered by each fuel injector. The system and method maintain engine and emissions performance by limiting the amount of fuel pressure decrease in the fuel accumulator.

    Abstract translation: 提供了一种用于在内燃机的燃料蓄积器中测量燃料压力的系统和方法。 该系统包括停止向发动机的燃料蓄积器的燃料流动的能力。 压力信号传递到发动机的控制系统，直到燃料蓄积器中的燃料压力下降预定量，此时燃料流被重新启用。 然后分析压力信号以确定由每个燃料喷射器输送的燃料的量或数量。 该系统和方法通过限制燃料蓄压器中的燃料压力降低的量来维持发动机和排放性能。

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