Increasingly stringent pollutant and CO2 emission standards require the car manufacturers to investigate innovative solutions to further improve the fuel economy of their fleets. Among these techniques, an extremely lean combustion has a large potential to simultaneously reduce the NOx raw emissions and the fuel consumption of spark-ignition engines. Application of pre-chamber ignition systems is a promising solution to realize a favorable air/fuel mixture ignitability and an adequate combustion speed, even with very lean mixtures.In this work, the combustion characteristics of an active pre-chamber system are experimentally investigated using a single-cylinder research engine. Conventional gasoline fuel is injected into the main chamber, while the pre-chamber is fed with compressed natural gas. In a first stage, an experimental campaign was carried out at various speeds, spark timings and air-fuel ratios. Global engine operating parameters as well as cylinder pressure traces, inside main combustion chamber and pre-chamber, were recorded and analyzed.Based on the available experimental data, a phenomenological model of this unconventional combustion system with divided combustion chambers was developed and validated. The model was then implemented in a 1D code. The proposed numerical approach shows the ability to simulate the experimental data with good accuracy, using a fixed tuning constant set. The model demonstrates to correctly describe the behavior of a pre-chamber combustion system under different operating conditions and to capture the physics behind such an innovative combustion system concept.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A Quasi-Dimensional Model of Pre-Chamber Spark-Ignition Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Müller, Christoph (Autor:in) / Tufano, Daniela (Autor:in) / Malfi, Enrica (Autor:in) / Bozza, Fabio (Autor:in) / Habermann, Knut (Autor:in) / De Bellis, Vincenzo (Autor:in)

    Kongress:

    WCX SAE World Congress Experience ; 2019



    Erscheinungsdatum :

    2019-04-02




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Development of a quasi-dimensional combustion model for stratified spark ignition engines

    Schmid,A. / Grill,M. / Berner,H.J. et al. | Kraftfahrwesen | 2009


    Multi-Zone Quasi-Dimensional Combustion Models for Spark-Ignition Engines

    Kaprielian, Leslie / Demoulin, Marc / Cinnella, Paola et al. | SAE Technical Papers | 2013



    Quasi-dimensional modelling of turbulence-driven phenomena in spark ignition engines

    Nefischer,A. / Neumann,J. / Stanciu,A. et al. | Kraftfahrwesen | 2014


    Prediction of misfire limits in spark-ignition engines using a quasi-dimensional model

    Dai,W. / Flory,M.S. / Frigui,N. et al. | Kraftfahrwesen | 1998