The efficiency of engine operations, i.e. cold start, transient response and operating at idle, depends on the capability of the injection fuel system to promote a homogeneous mixture formation through an efficient interaction with engine fluid dynamics and geometry. The paper presents the development and the application of a methodology for running a CFD PFI engine simulation. A preliminary assessment of the wall-film and droplet-wall interaction sub models has been carried out in order to validate the methodology. Then a three-step numerical procedure has been adopted. The first two steps are aimed to properly initialize the secondary breakup model depending on the type of injector installed on board in order to achieve accurate predictions of spray characteristics. Then, in the third step, the CFD calculations have been used to investigate the mixture formation with the particular focus to achieve an homogeneous mixture formation without the contamination of the lubricant with fuel. A particular engine operating condition at low load is here discussed.


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    Titel :

    CFD Analysis of Injection Timing Influence on Mixture Preparation in a PFI Motorcycle Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Grimaldi, C. N. (Autor:in) / Brusiani, F. (Autor:in) / Bianchi, G. M. (Autor:in) / Carmignani, L. (Autor:in) / Matteucci, L. (Autor:in) / Postrioti, L. (Autor:in) / Marcacci, M. (Autor:in) / Di Palma, S. (Autor:in)

    Kongress:

    Small Engine Technology Conference & Exposition ; 2006



    Erscheinungsdatum :

    2006-11-13




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    CFD Analysis of Injection Timing and Injector Geometry Influences on Mixture Preparation at Idle in a PFI Motorcycle Engine

    Grimaldi, C. N. / Brusiani, F. / Bianchi, G. M. et al. | SAE Technical Papers | 2007


    Effect of Fuel Injection Timing on the Mixture Preparation in a Small Gasoline Direct-Injection Engine

    Ramesh, A / Parsi, Anil / Jose, Jubin et al. | SAE Technical Papers | 2018


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