This paper reports on the progress in the development and testing of a novel two-stroke gasoline direct-injection engine (GDI) that incorporates uniflow scavenging without the use of camshaft actuated poppet valves. Compressed air is fed into the cylinder through a matrix of passive check valves located in the cylinder head. Air-only scavenging, in combination with high-pressure GDI, ensures that traditional two-stroke pitfalls, such as high emissions and poor fuel economy due to short circuiting, are eliminated. The engine was successfully operated at speeds up to 5500 rpm. In-cylinder and intake plenum pressures were measured as a function of time and crank angle from which the check valve opening and closing time and the duration of the scavenging process was identified. The delivery ratio and air-fuel (A/F) ratio are reported.


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    Titel :

    Development of a Novel Uniflow-Scavenged Two-Stroke GDI Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Ohlmann, D. (Autor:in) / Ciccarelli, G. (Autor:in) / Reynolds, S. (Autor:in)

    Kongress:

    SAE 2006 World Congress & Exhibition ; 2006



    Erscheinungsdatum :

    03.04.2006




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    PAQUETTE, M. W. | SAE Technical Papers | 1957


    Development of Two-Stroke Uniflow-Scavenged Engines

    Oestergaard,A. / Burmeister and Wain,DK | Kraftfahrwesen | 1979