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    Modeling and Control of an Exhaust Recompression HCCI Engine Using Split Injection

    Source: Journal of Dynamic Systems, Measurement, and Control:;2012:;volume( 134 ):;issue: 001::page 11016
    Author:
    Nikhil Ravi
    ,
    Chen-Fang Chang
    ,
    Han Ho Song
    ,
    J. Christian Gerdes
    ,
    Hsien-Hsin Liao
    ,
    Adam F. Jungkunz
    DOI: 10.1115/1.4004787
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Homogeneous charge compression ignition (HCCI) is currently being pursued as a cleaner and more efficient alternative to conventional engine strategies. Control of the load and phasing of combustion is critical in the effort to ensure reliable operation of an HCCI engine over a wide operating range. This paper presents an approach for modeling the effect of a small pilot injection during the recompression process of an HCCI engine, and a controller that uses the timing of this pilot injection to control the phasing of combustion. The model is a nonlinear physical model that captures the effect of fuel quantity and intake and exhaust valve timings on work output and combustion phasing. It is seen that around the operating points considered, the effect of a pilot injection can be modeled as a change in the Arrhenius threshold, an analytical construct used to model the phasing of combustion as a function of the thermodynamic state of the reactant mixture. The relationship between injection timing and combustion phasing can be separated into a linear, analytical component and a nonlinear, empirical component. Two different control strategies based on this model are presented, both of which enabled steady operation at low load conditions and effectively track desired load-phasing trajectories. These strategies demonstrate the potential of split injection as a practical cycle-by-cycle control knob requiring only minimal valve motion that would be easily achievable on current production engines equipped with cam phasers.
    keyword(s): Combustion , Control equipment , Fuels , Engines , Cycles , Homogeneous charge compression ignition engines , Exhaust systems , Cylinders AND Valves ,
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      Modeling and Control of an Exhaust Recompression HCCI Engine Using Split Injection

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    http://yetl.yabesh.ir/yetl1/handle/yetl/148546
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    • Journal of Dynamic Systems, Measurement, and Control

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    contributor authorNikhil Ravi
    contributor authorChen-Fang Chang
    contributor authorHan Ho Song
    contributor authorJ. Christian Gerdes
    contributor authorHsien-Hsin Liao
    contributor authorAdam F. Jungkunz
    date accessioned2017-05-09T00:49:19Z
    date available2017-05-09T00:49:19Z
    date copyrightJanuary, 2012
    date issued2012
    identifier issn0022-0434
    identifier otherJDSMAA-25516#011016_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/148546
    description abstractHomogeneous charge compression ignition (HCCI) is currently being pursued as a cleaner and more efficient alternative to conventional engine strategies. Control of the load and phasing of combustion is critical in the effort to ensure reliable operation of an HCCI engine over a wide operating range. This paper presents an approach for modeling the effect of a small pilot injection during the recompression process of an HCCI engine, and a controller that uses the timing of this pilot injection to control the phasing of combustion. The model is a nonlinear physical model that captures the effect of fuel quantity and intake and exhaust valve timings on work output and combustion phasing. It is seen that around the operating points considered, the effect of a pilot injection can be modeled as a change in the Arrhenius threshold, an analytical construct used to model the phasing of combustion as a function of the thermodynamic state of the reactant mixture. The relationship between injection timing and combustion phasing can be separated into a linear, analytical component and a nonlinear, empirical component. Two different control strategies based on this model are presented, both of which enabled steady operation at low load conditions and effectively track desired load-phasing trajectories. These strategies demonstrate the potential of split injection as a practical cycle-by-cycle control knob requiring only minimal valve motion that would be easily achievable on current production engines equipped with cam phasers.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleModeling and Control of an Exhaust Recompression HCCI Engine Using Split Injection
    typeJournal Paper
    journal volume134
    journal issue1
    journal titleJournal of Dynamic Systems, Measurement, and Control
    identifier doi10.1115/1.4004787
    journal fristpage11016
    identifier eissn1528-9028
    keywordsCombustion
    keywordsControl equipment
    keywordsFuels
    keywordsEngines
    keywordsCycles
    keywordsHomogeneous charge compression ignition engines
    keywordsExhaust systems
    keywordsCylinders AND Valves
    treeJournal of Dynamic Systems, Measurement, and Control:;2012:;volume( 134 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian