Spark-ignited engines equipped by a three-way catalyst require a precise control of the air fuel ratio fed to the combustion chamber. A stoichiometric mixture is necessary for the proper working of the catalyst in order to meet the legislation requirement.A critical part of the air fuel ratio control is the feed-forward compensation of the fuel dynamics. Conventional strategies are based on a simplified model of the wall-wetting phenomena whose parameters are stored in off-line computed look-up tables. Unfortunately, errors in the parameters calibration over the whole engine map deteriorate the control performances in terms of emissions.In this paper an automatic procedure for a rapid and efficient identification of the wall-wetting parameters is presented. The whole procedure has been experimentally tested on a vehicle by using a test bench. Using the identified parameters values, a significant reduction in the air fuel ratio excursion has been achieved during rapid throttle transients with respect to the same vehicle equipped by a commercial ECU with resident engine maps computed by traditional calibration activity. Moreover, the algorithm can be also on-line used to improve air-fuel ratio control performances.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    An Algorithm for the Calibration of Wall-Wetting Model Parameters


    Weitere Titelangaben:

    Sae Technical Papers



    Kongress:

    SAE 2003 World Congress & Exhibition ; 2003



    Erscheinungsdatum :

    2003-03-03




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    An algorithm for the calibration of wall-wetting model parameters

    Di Gaeta,A. / Santini,S. / Glielmo,L. et al. | Kraftfahrwesen | 2003


    2003-01-1054 An Algorithm for the Calibration of Wall-Wetting Model Parameters

    di Gaeta, A. / Santini, S. / Glielmo, L. et al. | British Library Conference Proceedings | 2003


    Automated calibration of an analytical wall-wetting model

    Dunne,W.J. / Brace,C.J. / Stodart,A. et al. | Kraftfahrwesen | 2007


    Automated Calibration of an Analytical Wall-Wetting Model

    Stodart, Andrew / Brace, Christian J. / Dunne, William J. | SAE Technical Papers | 2007


    An Easily Tunable Wall-Wetting Model for PFI Engines

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