Much engine research is aimed at measuring and reducing emissions at steady engine speeds and loads. However vehicle engine emissions produced during transient operation represent a significant proportion of total vehicle emissions. The work described concerns the design of a controller for an integrated powertrain, directed at reducing emissions during the full transient range of conditions. To optimise the controller, it is necessary to have an accurate representation of the powertrain. A modular simulation of the system has been produced and validated against experimental data. This paper describes the modelling process and discusses the validation of the computer models against experimental data. The simulation includes models of a Ford, 1.8IDI TCi Diesel engine, CTX continuously variable transmission with hydraulic controller and Orion car. It has been used to predict transient powertrain and vehicle behaviour. The engine model calculates the torque developed based upon the driver input and the effects of the turbocharger. The transmission and vehicle are represented by dynamic theoretical models. The engine model can be replaced by one consisting of several theoretically based dynamic models used in conjunction with an empirical cylinder model to determine emissions. It uses emissions data obtained from a steady state engine test facility to predict values under real conditions. Implications affecting the design of a powertrain controller are drawn from the results. Control strategies are being developed which can be tested initially on the computer models and then on a test rig and a test vehicle.


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    Title :

    A modular approach to the computer simulation of a passenger car powertrain incorporating a diesel engine and continuously variable transmission


    Contributors:
    Deacon, M. (author) / Brace, C.J. (author) / Guebeli, M. (author) / Vaughan, N.D. (author) / Burrows, C.R. (author) / Dorey, R.E. (author)

    Publication date :

    1994-01-01


    Size :

    6 pages



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English