A new multidimensional calculation method has been developed to simulate the warm-up characteristics of close-coupled catalytic converter systems. First, a one-dimensional gas exchange simulation and a three-dimensional exhaust gas flow calculation are combined to simulate the pulsation gas flow caused by the gas exchange process. The gas flow calculation and a heat transfer calculation are then combined to simulate heat transfer in the exhaust manifold and the catalyst honeycomb under pulsation flow. The predicted warm-up characteristics of the systems examined agreed well with the experimental data. In this simulation, CPU time was reduced greatly through the use of new calculation methods. Finally, the warm-up process of close-coupled catalysts is analyzed in detail with this simulation method. The design requirements for improving warm-up characteristics have been made clear. This simulation procedure is an effective design tool for developing close-coupled catalytic converter systems which have quick warm-up characteristics.


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    Titel :

    Numerical Analysis of the Exhaust Gas Flow and Heat Transfer in a Close-Coupled Catalytic Converter System During Warm-Up


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Yoshizawa, Koudai (Autor:in) / Mori, Kouji (Autor:in) / Kimura, Shuji (Autor:in)

    Kongress:

    SAE 2001 World Congress ; 2001



    Erscheinungsdatum :

    2001-03-05




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





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