An active diesel particulate filter (DPF) regeneration system is evaluated, which applies secondary fuel injection (SFI) directly within the exhaust system upstream of a diesel oxidation catalyst (DOC). Diesel fuel is oxidized in the presence of a proprietary catalyst system, increasing exhaust gas temperatures in an efficient and controlled manner, even during low engine-out gas temperatures. The exotherms produced by secondary fuel injection (SFI) have been evaluated using two different DOC volumes and platinum catalyst loadings. DOC light-off temperatures were measured using SFI under steady-state conditions on an engine dynamometer. A ΔT method was used for the light-off temperature measurements – i.e., the minimum DOC inlet gas temperature at which the exothermic reaction increases the outlet gas temperature 20°C or greater than the inlet temperature. All four of the DOCs tested exhibited similar exothermic behavior in achieving the 650°C target temperature at selected engine operating conditions. Analysis of an engine-tested DOC by X-ray diffraction, as well as the measurement of its conversion efficiencies for oxidation of CO, C3H6 and NO using a laboratory flow reactor are also reported.


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    Titel :

    Evaluation of a DPF Regeneration System and DOC Performance Using Secondary Fuel Injection


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Kotrba, Adam (Autor:in) / Yetkin, Argun (Autor:in) / Gysling, Henry (Autor:in) / Holroyd, Joseph (Autor:in) / Shotwell, Robert (Autor:in) / Gardner, Timothy (Autor:in) / Mustafa, Zaki (Autor:in)

    Kongress:

    SAE 2009 Commercial Vehicle Engineering Congress & Exhibition ; 2009



    Erscheinungsdatum :

    2009-10-06




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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