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    Diesel engine cylinder deactivation modes
    1.
    发明授权
    Diesel engine cylinder deactivation modes 有权

    公开(公告)号：US12104542B2

    公开(公告)日：2024-10-01

    申请号：US17413775

    申请日：2019-12-13

    Applicant: Eaton Intelligent Power Limited

    Inventor： James E. McCarthy, Jr. ,  Matthew Pieczko

    IPC: F02D13/06 ,  F02D41/00 ,  F02D41/08 ,  F02D41/14

    CPC classification number: F02D13/06 ,  F02D41/0087 ,  F02D41/08 ,  F02D41/1498 ,  F02D2041/0012 ,  F02D2200/025 ,  F02D2200/101

    Abstract: When selecting cylinders of a multi-cylinder diesel engine in an engine system for cylinder deactivation (CDA), a method can comprise designating a first resonance around a first periodic frequency output of the engine system as a primary boundary and designating a second resonance around a second periodic frequency output of the engine system as a secondary boundary. Selecting cylinders can comprise selecting one of half, one third, or two thirds of the multiple cylinders for CDA while firing the remaining multiple cylinders. The selection can be made so that the periodic frequency output of the engine is between the primary and secondary boundaries. A compact periodic frequency band can be implemented to further restrict the selection of cylinders for CDA. The first periodic frequency output can be about 15 Hertz+/−1.5 Hertz and the second periodic frequency output can be between 30-40 Hertz+/−1.5 Hertz.

    Controller and control method for multi-cylinder internal combustion engine
    2.
    发明授权
    Controller and control method for multi-cylinder internal combustion engine 有权

    公开(公告)号：US12085031B2

    公开(公告)日：2024-09-10

    申请号：US17523534

    申请日：2021-11-10

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Hitoki Sugimoto

    IPC: F02D41/00 ,  F02D41/14 ,  F02D41/18 ,  F02D41/22

    CPC classification number: F02D41/0087 ,  F02D41/1454 ,  F02D41/182 ,  F02D41/22

    Abstract: When an intake air amount is greater than or equal to the lower limit intake air amount and less than or equal to the upper limit intake air amount, a CPU sets, from the first cylinder group that increases a detection value of an upstream air-fuel ratio sensor, one of cylinders that has the smallest cutoff frequency, which is stored in a storage device, as a cylinder to which the supply of fuel will be cut off. Then, the CPU obtains the maximum value of an upstream air-fuel ratio as a maximum air-fuel ratio. When the maximum air-fuel ratio is greater than a determination value, the CPU determines that specific cylinder fuel cutoff control is normal. When the maximum air-fuel ratio is less than or equal to the determination value, the CPU determines that the specific cylinder fuel cutoff control is anomalous.

    ELECTRONIC CONTROL DEVICE FOR MIXED HYDROGEN COMBUSTION, AND METHOD FOR CONTROLLING HYDROGEN MIXING RATIO
    4.
    发明公开
    ELECTRONIC CONTROL DEVICE FOR MIXED HYDROGEN COMBUSTION, AND METHOD FOR CONTROLLING HYDROGEN MIXING RATIO 审中-公开

    公开(公告)号：US20240263593A1

    公开(公告)日：2024-08-08

    申请号：US18562857

    申请日：2022-04-20

    Applicant: HITACHI, LTD.

    Inventor： Atsushi SHIMADA ,  Yoshihiro SUKEGAWA ,  Kengo KUMANO

    IPC: F02D35/02 ,  F02D41/00 ,  F02D41/40

    CPC classification number: F02D35/028 ,  F02D41/0087 ,  F02D41/401

    Abstract: An electronic control device for mixed hydrogen combustion includes a combustion timing detection unit that detects the combustion timing of an engine; and an abnormal state detection unit that detects an abnormal state, in which a type of abnormality occurring in the engine has been determined, on the basis of the combustion timing and a second fuel supply ratio calculated from the supply amount of hydrocarbon fuel supplied by a first fuel supply device and the supply amount of a second fuel supplied by a second fuel supply device. A control mode determination unit determines a control mode corresponding to the abnormal state, controls the supply amount of hydrogen to be supplied by the second fuel supply device on the basis of the control mode, and outputs the control mode to an engine controller for controlling the engine.

    SYSTEMS AND METHODS FOR AFTERTREATMENT SYSTEM THERMAL MANGEMENT USING CYLINDER DEACTIVATION AND/OR INTAKE-AIR THROTTLING
    7.
    发明公开
    SYSTEMS AND METHODS FOR AFTERTREATMENT SYSTEM THERMAL MANGEMENT USING CYLINDER DEACTIVATION AND/OR INTAKE-AIR THROTTLING 审中-公开

    公开(公告)号：US20240141845A1

    公开(公告)日：2024-05-02

    申请号：US18497688

    申请日：2023-10-30

    Applicant: Cummins Inc. ,  Tula Technology, Inc.

    Inventor： Kunpeng Wang ,  Ke Wang ,  Yuan Zoe ,  Zhou Cao

    IPC: F02D41/02 ,  F02D41/00 ,  F02D41/18

    CPC classification number: F02D41/024 ,  F02D41/0087 ,  F02D41/18 ,  F02D2041/1412 ,  F02D2200/0802

    Abstract: Systems and methods for aftertreatment system thermal management using cylinder deactivation and/or intake-air throttling are disclosed. Systems and methods for thermal management of an aftertreatment system are provided herein. A controller coupled to an engine and an exhaust aftertreatment system is configured to: receive a first temperature value associated with the exhaust aftertreatment system and a second temperature value associated with the engine; determine, based on comparing the first temperature value to a first threshold, a thermal management mode including a first thermal management mode or a second thermal management mode; determine, responsive to determining the thermal management mode and based on comparing the second temperature value to a second threshold, an operating mode for the thermal management mode including at least one of a first operating mode or a second operating mode; and initiate the at least one of the first or the second operating mode.

    Fuel system management during cylinder deactivation operation
    8.
    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.

    CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE
    10.
    发明公开
    CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 审中-公开

    公开(公告)号：US20230323831A1

    公开(公告)日：2023-10-12

    申请号：US18193702

    申请日：2023-03-31

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Yuto IKEDA ,  Ryota SUGIYAMA ,  Takanobu GOTOH

    IPC: F02D41/40 ,  F02D41/00

    CPC classification number: F02D41/402 ,  F02D41/0087 ,  F02D2041/389

    Abstract: A controller is configured to control an internal combustion engine. The internal combustion engine may execute multi-shot injection and single-shot injection and execute a deactivating process that stops supplying fuel to at least one of cylinders and supplies fuel to the remaining cylinders. The controller is configured to execute, when terminating the deactivating process to restart supplying fuel to a deactivated cylinder in which supply of fuel is stopped, a retarding process that executes a first fuel injection through the single-shot injection and retards a fuel injection start timing as compared to when executing the multi-shot injection.

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