To drastically improve thermal efficiency of a gasoline spark-ignited engine, super-lean burn is a promising solution. Although, studies of lean burn have been made by so many researchers, the realization is blocked by a cycle-to-cycle combustion variation. In this study, based on the causes of cycle-to-cycle variation clarified by the authors’ previous study, a unique method to reduce the cycle-to-cycle variation is proposed and evaluated. That is, a bulk quench at early expansion stroke could be reduced by making slight fuel stratification inside the cylinder using the twin-tumble of intake flows. As a result, the lean limit was extended with keeping low NOx and moderate THC emissions, leading to higher thermal efficiency.


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    Titel :

    Fuel Stratification Using Twin-Tumble Intake Flows to Extend Lean Limit in Super-Lean Gasoline Combustion


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Sato, Hironao (Autor:in) / Kaneko, Makoto (Autor:in) / Kuboyama, Tatsuya (Autor:in) / Yamada, Toshio (Autor:in) / Moriyoshi, Yasuo (Autor:in)

    Kongress:

    International Powertrains, Fuels & Lubricants Meeting ; 2018



    Erscheinungsdatum :

    10.09.2018




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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