Dynamic simulation models of turbocharged Diesel and gasoline engines are increasingly being used for design and initial testing of engine control strategies. The turbocharger submodel is a critical part of the overall model, but its control-oriented modeling has received limited attention thus far. Turbocharger performance maps are typically supplied in table form, however, for inclusion into engine simulation models this form is not well suited. Standard table interpolation routines are not continuously differentiable, extrapolation is unreliable and the table representation is not compact. This paper presents an overview of curve fitting methods for compressor and turbine characteristics overcoming these problems. We include some background on compressor and turbine modeling, limitations to experimental mapping of turbochargers, as well as the implications of the compressor model choice on the overall engine model stiffness and simulation times.The emphasis in this paper is on compressor flow rate modeling, since this is both a very challenging problem as well as a crucial part of the overall engine model. For the compressor, four different methods, including neural networks, are presented and tested on three different compressors in terms of curve fitting accuracy, model complexity, genericity and extrapolation capabilities. Curve fitting methods for turbine characteristics are presented for both a wastegated and a variable geometry turbine.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Turbocharger Modeling for Automotive Control Applications


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1999



    Publication date :

    1999-03-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Turbocharger modeling for automotive control applications

    Moraal,P. / Kolmanovsky,I. / Ford Forschungszentrum,Aachen,DE et al. | Automotive engineering | 1999


    Automotive Turbocharger Dynamic Modeling

    Venson, Giuliano Gardolinski / Barros, José Eduardo Mautone | SAE Technical Papers | 2008


    Automotive Turbocharger Dynamic Modeling

    Barros, J.E.M. / Venson, G.G. / Society of Automotive Engineers | British Library Conference Proceedings | 2008


    Axial-radial turbocharger for automotive applications

    Bruffell,W.K. / Parkers,A.J. / Wardlaw,M.J. et al. | Automotive engineering | 1990


    Axial-Radial Turbocharger for Automotive Applications

    Parkes, A. J. / Wardlaw, M. J. / Bruffell, W. K. | SAE Technical Papers | 1990