Highly downsized, Direct Injection (DI) engines benefit strongly from cylinder scavenging where possible, to reduce internal residuals thereby reducing the occurrence of knock. Some researchers also suggest that non-homogeneous distribution of internal residuals at high load could contribute to pre-ignition or ‘mega-knock’ with much higher pressure amplitude than that of common knock.For this reason, a computational study was conducted to assess the residual gas fraction and in-cylinder distribution, using the combustion geometry of the three cylinder, 1.2L MAHLE Downsizing engine, which has proven to be a very robust and reliable research tool into the effects of combustion effects under a number of different operating conditions. This study used a CFD model of the cylinder gas exchange. ES-ICE coupled with STAR-CD was employed for a moving mesh, transient in-cylinder simulation. The boundary conditions were provided by a correlated 1-D (GT-power) model, with several scenarios simulated including engine speed, valve overlap and port geometry. The residual distributions at part load with different inlet ports were also assessed.


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    Titel :

    Simulation of Exhaust Gas Residuals in a Turbocharged, Spark Ignition Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Copeland, Colin D. (Autor:in) / Neumeister, Jens (Autor:in) / Mitcalf, John (Autor:in) / Freeland, Paul A. (Autor:in) / Gao, Xing (Autor:in)

    Kongress:

    SAE/KSAE 2013 International Powertrains, Fuels & Lubricants Meeting ; 2013



    Erscheinungsdatum :

    14.10.2013




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Simulation of Exhaust Gas Residuals in a Turbocharged, Spark Ignition Engine

    Copeland, C.D. / Gao, X. / Freeland, P.A. et al. | British Library Conference Proceedings | 2013


    Turbocharged Spark Ignition Engine Simulation

    Watson, Neil | SAE Technical Papers | 1984


    Turbocharged spark ignition engine simulation

    Watson,N. | Kraftfahrwesen | 1984


    Turbocharged Spark Ignition Two Stroke Engine

    Hardman, Ken | SAE Technical Papers | 1994


    Turbocharged spark ignition two stroke engine

    Hardman,K. / Univ.of Illinois,Chicago,US | Kraftfahrwesen | 1994