An experimental study was carried out that qualitatively examined the mixture preparation process in port fuel injected engines. The primary variables in this study were intake valve lift, intake valve timing, injector spray quality, and injection timing. A special visualization engine was used to obtain high-speed videos of the fuel-air mixture flowing through the intake valve, as well as the wetting of the intake valve and head in the combustion chamber. Additionally, videos were taken from within the intake port using a borescope to examine liquid fuel distribution in the port. Finally, a simulation study was carried out in order to understand how the various combinations of intake valve lifts and timings affect the flow velocity through the intake valve gap to aid in the interpretation of the videos.The net result of the study was the construction of an “event diagram” for each experimental condition that identifies and explains the sequence of events and interactions affecting the liquid fuel. Six mechanisms that transport liquid fuel into the combustion chamber and four that affect liquid fuel behavior within the combustion chamber were identified.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Mixture Preparation Mechanisms in a Port Fuel Injected Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    2005 SAE Brasil Fuels & Lubricants Meeting ; 2005



    Erscheinungsdatum :

    11.05.2005




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Mixture preparation mechanisms on a port fuel injection engine

    Costanzo,V.S. / Heywood,J.B. / Massachusetts Inst.of Technology,Cambridge,US | Kraftfahrwesen | 2005



    Diagnostics for the study of cold start mixture preparation on a port fuel-injected engine

    Witze,P.O. / Sandia National Lab.,Livermore,US | Kraftfahrwesen | 1999


    Fuel Preparation in Port-Injected Engines

    Finlay, I.C. / Martins, J.J.G. | SAE Technical Papers | 1992


    Mixture Preparation During Cranking in a Port-Injected 4-Valve SI Engine

    Hall, Matthew J. / Koenig, Michael H. / Matthews, Ronald D. et al. | SAE Technical Papers | 1997