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    Analysis of a Stratified Charging Concept for High-Performance Two-Stroke Engines

    Analysis of a Stratified Charging Concept for High-Performance Two-Stroke Engines


    This paper presents the results and conclusions from a conceptual design study for a stratified charging concept. The stratified charging engine has a displacement of 64 cm3 and a four-port design with reed valves at two ports to control the bypass air. During the intake stroke of the engine, bypass air is sucked into the transfer ports to purge the air-fuel mixture present in the ports from the previous stroke back into the crankcase. This fills the transfer ports near the exhaust with pure air at the beginning of the scavenging stroke. During scavenging, the bypass air is ejected in the cylinder, shielding the exhaust against the fresh mixture coming from the ports on the intake side. This allows the hydrocarbon emissions to be reduced by over 40 %.The conceptual design study is based on an analysis of the mixture short-circuiting mechanisms and CFD investigations of the scavenging flow with charge stratification.

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    Titel :

    Analysis of a Stratified Charging Concept for High-Performance Two-Stroke Engines

    Weitere Titelangaben:

    Sae Technical Papers

    Beteiligte:
    Klimmek, Axel (Autor:in) / Rosskamp, Heiko (Autor:in) / Raffenberg, Michael (Autor:in) / Zahn, Wolfgang (Autor:in)
    Kongress:

    SAE 2000 World Congress ; 2000

    Erschienen in:

    Sae Technical Paper Series

    Erscheinungsdatum :

    2000-03-06

    ISSN :

    2688-3627 , 0148-7191

    DOI :

    https://doi.org/10.4271/2000-01-0900

    Medientyp :

    Aufsatz (Konferenz)

    Format :

    Print

    Sprache :

    Englisch

    Schlagwörter :

    Hydrocarbons , Stratified charge engines

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