In modern spark-ignited engines the accurate estimation of the amount of fuel to be injected is an important issue, in particular if a specific air-to-fuel ratio is required. The knowledge of the events occurring between the intake duct (injectors) and the exhaust duct (λ-sensor) is thus very important. Among all the systems that play a role, the best studied are the wall-wetting dynamics.Nowadays, the wall-wetting effects are compensated on the basis of simple linear models that are tuned with the help of a large number of measurements. These models are quite effective but they cannot be used universally.Their extrapolation for a non-measured operating point can lead to unsatisfactory results. Other problems arise at operating points where direct measurements are difficult, e.g., at cold start.Complex models already exist, but usually they require a lot of work in the parameterization phase. This paper introduces a wall-wetting model based on first physical principles which has all the properties of the simple model, but is able to extrapolate the behavior of the film dynamics when needed, and it is suitable for control purposes.The results of this paper show that by applying such a model on an SI engine the number of measurements can be even further reduced, because of an increased understanding of the physics of the wall-wetting.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    An Easily Tunable Wall-Wetting Model for PFI Engines


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2004 World Congress & Exhibition ; 2004



    Publication date :

    2004-03-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    An Easily Tunable Wall-Wetting Model for PFI Engines

    Loctelli, M. / Onder, C. H. / Geering, H. P. et al. | British Library Conference Proceedings | 2004


    An easily tunable wall-wetting model for port fuel injection engines

    Locatelli,M. / Onder,C.H. / Geering,H.P. et al. | Automotive engineering | 2004


    Experimental Investigation of In-Cylinder Wall Wetting in GDI Engines Using a Shadowgraphy Method

    Brunn, Andre / Somers, Bart / Luijten, Bennie et al. | SAE Technical Papers | 2013


    .Move easily removable scarlet bullet wall

    SEO SEUNG HO / WOO SOON | European Patent Office | 2017

    Free access

    .Move easily removable scarlet bullet wall

    SEO SEUNG HO / WOO SOON | European Patent Office | 2018

    Free access