During the development of conventional PFI engines, WOT (Wide Open Throttle) performance tends to be sacrificed for exhaust emission reduction in order to meet the latest emissions regulations. To satisfy both power and emissions, a new V-6 engine employing stoichiometric gasoline direct injection, the 3GR-FSE, with variable intake and exhaust valve timing systems, was developed and meets the ULEV exhaust emission standard without sacrificing WOT performance. It is generally understood that THC emissions are reduced during warm-up through quick catalyst light-off by retarding ignition timing. However, the effect of this is limited by engine torque fluctuations. Under this warm-up condition, stratified charge combustion is known to significantly improve the engine torque fluctuation and enable more retard ignition timing. Furthermore, by using the variable exhaust valve-timing system, the internal EGR gas assists fuel spray atomization, increasing the expansion ratio to promote HC combustion in the chamber. As a result, THC emissions are reduced.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Emission Reduction of a Stoichiometric Gasoline Direct Injection Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Suzuki, Hisao (Autor:in) / Morita, Koji (Autor:in) / Kawase, Takashi (Autor:in) / Sonoda, Yukihiro (Autor:in)

    Kongress:

    Powertrain & Fluid Systems Conference & Exhibition ; 2005



    Erscheinungsdatum :

    24.10.2005




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Emission reduction of a stoichiometric gasoline direct injection engine

    Morita,K. / Sonoda,Y. / Kawase,T. et al. | Kraftfahrwesen | 2005


    Analysis of Mixture Formation Process in a Stoichiometric Direct Injection Gasoline Engine

    Asabatake, Kimihiro / Matsubara, Koji / Okumi, Masayoshi et al. | SAE Technical Papers | 2003


    Development of a New V-6 High Performance Stoichiometric Gasoline Direct Injection Engine

    Kishi, Hirohisa / Harada, Jun / Sugiyama, Masanori et al. | SAE Technical Papers | 2005


    Development of a new V 6 high performance stoichiometric gasoline direct injection engine

    Abe,S. / Sugiyama,M. / Kishi,H. et al. | Kraftfahrwesen | 2004


    Development of a new V-6 high performance stoichiometric gasoline direct injection engine

    Sadakane,S. / Sugiyama,M. / Kishi,H. et al. | Kraftfahrwesen | 2005