The most efficient way and the best available technology (BAT) to radically reduce the critical diesel emission components particles (PM&NP) and nitric oxides (NOx) are combined exhaust gas aftertreatment systems (DPF+SCR). SCR (selective catalytic reduction) is regarded as the most efficient deNOx-system, diesel particle filters are most efficient for soot abatement. Today, several suppliers offer combined systems for retrofitting of HD vehicles.The presented results are part of the work in the international network project VERT *) dePN (de-activation, de-contamination, disposal of particles and NOx), which has the objectives to establish test procedures and quality standards and to introduce the SCR-, or combined DPF+SCR-systems in the VERT verification procedure.Examples of results for some of the investigated systems are given and the most important findings are: - the average NOx conversion rate at transient operation strongly depends on the operation load profile, on the exhaust gas temperature and the resulting urea dosing control, - the particle number filtration efficiency, which is verified at stationary engine operation, is valid also at the transient operation, - secondary nanoparticles are produced due to urea injection, they nevertheless do not impact significantly the overall filtration efficiency of the system (here: DPF upstream & SCR downstream, differences of PCFE in the range of 0.1%), - the OEM NOx-sensors of the investigated systems are appropriate tools for the in-use control, - the system with catalyzed DPF (upstream) attains higher overall deNOx-efficiencies due to NO₂-production in the DPF, - for the investigated systems there are no critical emissions of unregulated components, NH₃ & N₂O.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Diesel Emission with DPF+SCR in VERTdePN - Testing & Potentials


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Mayer, Andreas (Autor:in) / D'Urbano, Giovanni (Autor:in) / Czerwinski, Jan (Autor:in) / Heeb, Norbert (Autor:in) / Zimmerli, Yan (Autor:in)

    Kongress:

    SAE 2011 World Congress & Exhibition ; 2011



    Erscheinungsdatum :

    12.04.2011




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Diesel emission with DPF+SCR in VERTdePN - testing and potentials

    Czzerwinski,J. / Zimmerli,Y. / Mayer,A. et al. | Kraftfahrwesen | 2011


    2011-01-1139 Diesel Emission with DPF+SCR in VERTdePN - Testing & Potentials

    Czerwinski, J. / Zimmerli, Y. / Mayer, A. et al. | British Library Conference Proceedings | 2011


    Emission potentials of future diesel injection systems

    Breitbach,H. / Schommers,J. / Stotz,M. et al. | Kraftfahrwesen | 2008


    Emission potentials of a diesel plug-in hybrid

    Diezemann,M. / von Essen,C. / Leesch,M. et al. | Kraftfahrwesen | 2012


    Emission Potentials of a Diesel Plug-in Hybrid

    Dipl.-Ing. Diezemann, Matthias / Dipl.-Ing. Essen, Carsten / Dipl.-Ing. Leesch, Mirko | Springer Verlag | 2012