The effects of EGR on diesel combustion were visually examined in a single-cylinder heavy duty research engine with a low compression ratio, low swirl, a CR fuel injection system and an eight-orifice nozzle. Optical access was primarily obtained through the cylinder head. The effects of EGR were found to be significant. NOx emissions were reduced from over 500 ppm at 0% EGR to 5 ppm at 55% EGR. At higher levels of EGR (approximately 35% or more) there was a loss in efficiency. Constant fuel masses were injected. Results from the optical measurements and global emission data were compared in order to obtain a better understanding of the spray behaviour and mixing process. Optical measurements provide fundamental insights by visualizing air motion and combustion behaviour. The NOx reductions observed might be explained by reductions in oxygen concentration associated with the increases in EGR.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Visualization of EGR Influence on Diesel Combustion With Long Ignition Delay in a Heavy-duty Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Denbratt, Ingemar (Autor:in) / Engström, Johan (Autor:in) / Gjirja, Savo (Autor:in) / Husberg, Tobias (Autor:in)

    Kongress:

    2004 Powertrain & Fluid Systems Conference & Exhibition ; 2004



    Erscheinungsdatum :

    2004-10-25




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Visualization of EGR influence on diesel combustion with long ignition delay on a heavy-duty engine

    Husberg,T. / Gjirja,S. / Denbratt,I. et al. | Kraftfahrwesen | 2004


    Visualization of EGR Influence on Diesel Combustion With Long Ignition Delay in a Heavy-duty Engine

    Husberg, T. / Gjirja, S. / Denbratt, I. et al. | British Library Conference Proceedings | 2004


    Premixed compression ignition combustion with various injector configurations in a heavy duty diesel engine

    Jung, Yongjin / Bae, Choongsik / Choi, Seibum B. et al. | SAGE Publications | 2013