The flow structure inside the catalytic converter of gasoline engines is very important for consideration of the catalyst light-off condition, converter durability and conversion efficiency. However, the available experimental data under actual engine exhaust conditions are quite limited due to its complicated configuration, critical operating conditions and difficult optical access. Therefore, an experimental study was performed, using laser Doppler velocimetry technique, to measure the velocity distributions inside two production dual-monolith catalytic converters fitted on a firing gasoline engine over several engine operating conditions. This paper reports the normal velocity characteristics measured in a plane 1 mm away from the front surface of first monolith. A small fraction of titanium (IV) isopropoxide was dissolved in gasoline for generating titanium dioxide seeding particles during the engine combustion. Experimental results showed that the velocity is highly fluctuating due to the pulsating nature of the engine exhaust flow and the velocity distribution strongly depends on engine speed, engine cooling water temperature and converter diffuser geometry.


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    Titel :

    An Experimental Study of the Flow Structure Inside the Catalytic Converter of a Gasoline Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Zhao, Fu-Quan (Autor:in) / Li, Li (Autor:in) / Lai, Ming-Chia (Autor:in) / Xie, Xingbin (Autor:in)

    Kongress:

    International Congress & Exposition ; 1995



    Erscheinungsdatum :

    01.02.1995




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





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    Zhao, F.-Q. / Bai, L. / Liu, Y. et al. | British Library Conference Proceedings | 1997



    Thermal Measurements Inside a Three-Way Catalytic Converter on Engine Bench

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