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    INTEGRATION OF ELECTRIC HEATER INTO AFTERTREATMENT CATALYST THERMAL MANAGEMENT
    13.
    发明公开
    INTEGRATION OF ELECTRIC HEATER INTO AFTERTREATMENT CATALYST THERMAL MANAGEMENT 审中-公开

    公开(公告)号：US20240295184A1

    公开(公告)日：2024-09-05

    申请号：US18268176

    申请日：2021-12-17

    Applicant: Cummins Inc.

    Inventor： Dheeraj Bharadwaj Gosala ,  Avra Brahma

    IPC: F01N3/20 ,  F01N9/00

    CPC classification number: F01N3/2013 ,  F01N9/002 ,  F01N2900/08 ,  F01N2900/104 ,  F01N2900/1404 ,  F01N2900/1626

    Abstract: A method for increasing a temperature of an exhaust gas to a target temperature is provided. The method includes determining, by a controller, a target energy of the exhaust gas and determining, by the controller, a target emissions based the target energy. The method further includes determining, by the controller, a tradeoff in a performance of an engine corresponding to one or more of the target emissions, an engine speed, and a driver demand power and determining, by the controller, an allowable heater power based on the tradeoff. The method further includes operating, by the controller, a heater with a heater power command not exceeding the allowable heater power to heat the exhaust gas to the target temperature.

    Fuel system management during cylinder deactivation operation
    14.
    发明授权
    Fuel system management during cylinder deactivation operation 有权

    公开(公告)号：US11905908B2

    公开(公告)日：2024-02-20

    申请号：US17498003

    申请日：2021-10-11

    Applicant: Cummins Inc.

    Inventor： Ross A. Phillips ,  Donald J. Benson ,  J. Steven Kolhouse ,  Avra Brahma

    IPC: F02D41/38 ,  F02D41/00

    CPC classification number: F02D41/3845 ,  F02D41/0087 ,  F02D2200/0602

    Abstract: A method for operating an engine fueling system to manage fuel in an accumulator supplying fuel to an engine including multiple cylinders comprising monitoring fuel load in the accumulator, determining that the engine is operating in a cylinder deactivation mode such as a skip-fire mode during which one or more fueling events to one or more of the cylinders is being skipped, and controlling a supply of fuel from a fuel pump to the accumulator during the cylinder deactivation mode operation. In embodiments, controlling the supply of fuel includes causing fuel to be supplied from the fuel pump to the accumulator if the monitored fuel load is less than or equal to a first fuel load, and causing fuel to be not supplied from the fuel pump to the accumulator if the monitored fuel load is greater than the first load value. Controlling the supply of fuel may comprise controlling the supply of fuel during each fueling event cycle of each deactivated cylinder.

    Air-fuel ratio imbalance diagnostic using exhaust manifold pressure
    18.
    发明授权
    Air-fuel ratio imbalance diagnostic using exhaust manifold pressure 有权

    公开(公告)号：US10539087B2

    公开(公告)日：2020-01-21

    申请号：US16136680

    申请日：2018-09-20

    Applicant: Cummins Inc.

    Inventor： Avra Brahma ,  Yongsoon Yoon

    IPC: F02D41/14 ,  F02D41/00 ,  F02D41/22 ,  F02D41/28

    Abstract: One embodiment is a method comprising operating an internal combustion engine system including multiple cylinders structured to combust a charge mixture and to output exhaust to an exhaust manifold, an electronic control system structured to control operation of the engine system and an exhaust manifold pressure (EMP) sensor structured to provide data to the electronic control system and performing an air-fuel ratio (AFR) imbalance diagnostic with the electronic control system. The AFR imbalance diagnostic may comprise the acts of processing the data to provide at least one output metric sample, determining an output metric statistic based on the at least one output metric sample, evaluating the output metric statistic relative to one or more predetermined criteria to identify an AFR imbalance condition, and providing an operator perceptible indication of the AFR imbalance condition.

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