The aim of this paper is the experimental investigation of the effect of direct fuel injection on the combustion process and pollutant formation in a spark ignition (SI) two-wheel engine. The engine is a 250cc single cylinder, four-stroke spark-ignition firstly equipped with a four-valve PFI head and then with GDI one operating with European commercial gasoline and Bio-ethanol. It is equipped with a wide sapphire window in the bottom of the chamber and quartz cylinder. In the combustion chamber, optical techniques based on 2D-digital imaging were used to follow the injection and flame propagation and spectroscopic measurements were carried out in order to evaluate the main radical species. Radical species such as OH and CH were detected and used to follow the chemical phenomena related to the fuel quality. Measurements were carried out at different engine speeds and combustion strategies based on different injection pressures. They were chosen in order to allow both optical measurements and to test the engine in real conditions.


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    Title :

    Non-Intrusive Investigation in a Small GDI Optical Engine Fuelled with Gasoline and Ethanol


    Additional title:

    Sae Int. J. Engines


    Contributors:

    Conference:

    SAE 2011 World Congress & Exhibition ; 2011


    Published in:

    Publication date :

    2011-04-12


    Size :

    17 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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