The development phases and test bench results related to the conversion of a bus Diesel engine of 6 cylinder 9.8 L displacement to an aftercooled turbocharged Spark Ignition (SI) compressed natural gas engine are reported. A pre-screening of various piston shapes was performed using the KMB CFD code to determine the most promising intake-chamber geometries according to computed mean flow and turbulence results. Then, the designed pistons were built for engine tests. Ignition characteristics, valve lift laws, bowl shape and swirl level were optimized to find the trade-off between efficiency and emissions. The finally retained solution reaches performances very close to the starting Diesel engine by running ultra lean (λ > 1.8) with a maximum thennal efficiency larger than 40% for a compression ratio of 12.5: 1. The complementary use of an efficient oxidizing catalyst allows nitrogen oxide emissions lower than lg/kWh for the European 13 mode cycle.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Development of a High Efficiency, Low Emission SI-CNG Bus Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    International Fuels & Lubricants Meeting & Exposition ; 1996



    Erscheinungsdatum :

    1996-05-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Development of a high efficiency, low emission SI-CNG bus engine

    Tilagone,R. / Monnier,G. / Chaouche,A. et al. | Kraftfahrwesen | 1996


    Development of a High Efficiency, Low Emission SI-CNG Bus Engine

    Tilagone, R. / Monnier, G. / Chaouche, A. et al. | British Library Conference Proceedings | 1996


    Development of a Low Emission and High Efficiency 2-Stroke Car Diesel Engine

    Federation Internationale des Societes d'Ingenieurs des Techniques de l'Automobile | British Library Conference Proceedings | 2002


    Study of High Efficiency Zero-Emission Argon Circulated Hydrogen Engine

    Kato, Akira / Sawada, Daisaku / Kamiyama, Eiichi et al. | SAE Technical Papers | 2010


    High efficiency internal combustion stirling engine development

    Patton,R. / Bennett,G. / P and B Enterprises,US | Kraftfahrwesen | 2011