This paper describes a NOx aftertreatment system and control strategy for heavy-duty diesel engines to achieve US EPA 2010 emissions regulations. The NOx aftertreatment system comprises of a fuel reformer catalyst, a LNT catalyst, and a SCR catalyst. The only reductant required to operate this system is diesel fuel; hence, no urea infrastructure is required to support this approach. The fuel reformer is used to generate reformate which is a combination of hydrogen, carbon monoxide and unburned hydrocarbons. This reformate provides a more efficient feedstock to improve LNT NOx regeneration efficiency. Engine out NOx is reduced using a two-step process. First, NOx is stored in the LNT catalyst during lean operation. During rich operation, portions of the stored NOx are converted to nitrogen and ammonia. Next, the ammonia released from the LNT is captured by the downstream SCR catalyst. The stored ammonia is further used to reduce the NOx that slips past the LNT catalyst.System hardware was developed and evaluated in dynamometer test cells using 9L and 14L commercial-available heavy-duty diesel engines. System control strategies were developed to optimize the NOx conversion efficiency and fuel penalty.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Advanced NOx Aftertreatment System And Controls For On-Highway Heavy Duty Diesel Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Hu, Haoran (Autor:in) / McCarthy, James (Autor:in) / Reuter, Johannes (Autor:in) / Yan, John (Autor:in)

    Kongress:

    SAE 2006 Commercial Vehicle Engineering Congress & Exhibition ; 2006



    Erscheinungsdatum :

    2006-10-31




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Emission Testing of Two Heavy Duty Diesel Engines Equipped with Exhaust Aftertreatment

    Gabelman, Brian / Stiglic, Paul / Hundemer, Russ | SAE Technical Papers | 1990


    Mechanically bonded radiators for heavy-duty off-highway diesel engines

    Dezek,R. / Klompmarker,D. / Sprenger,M. | Kraftfahrwesen | 1992


    Advanced Technology Fuel System for Heavy Duty Diesel Engines

    Coldren, D.R. / Moncelle, M.E. | SAE Technical Papers | 1997


    Advanced technology fuel system for heavy duty diesel engines

    Codren,D.R. / Moncelle,M.E. / Caterpillar,US | Kraftfahrwesen | 1997