A two-dimensional technique for the quantitative determination of the fuel-air ratio in hydrogen fuelled engines has been developed. The technique is based on the spontaneous Raman scattering of the hydrogen molecules (Stokes Q-branch) and the simultaneous measurement of the pressure inside the combustion chamber. From these data the local partial pressure of the hydrogen and, therefore, the fuel air ratio can be calculated. This method was applied in a single cylinder direct injection research engine in order to prove the applicability of this technique under real engine conditions. The measurements inside the side chamber of the engine show a fast mixing process of the compressed air and the injected hydrogen (6 MPa injection pressure) independent of the injection timing.


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    Title :

    Quantitative time resolved 2-D fuel-air ratio measurements in a hydrogen direct injection SI engine using spontaneous Raman scattering


    Additional title:

    Quantitative zeitaufgelöste 2D Messungen des Treibstoff/Luft Verhältnises in einem Ottomotor mit Wasserstoffdirekteinspritzung mit Verwendung spontaner Raman-Streuung


    Contributors:
    Meier, F. (author) / Wiltafsky, G. (author) / Köhler, J. (author) / Stolz, W. (author)


    Publication date :

    1996


    Size :

    9 Seiten, 12 Bilder, 3 Tabellen, 39 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






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