A novel engine cycle-simulations program has been developed to reproduce both conventional diesel and HCCI combustion for wide changes in engine operating conditions. The principal results are as follows: (1) Combustion characteristics were predicted well for wide changes in fuel injection quantity, injection pressure, and injection timing by the simulation that uses a multi-zone PDF model. (2) The combustion process of multi-injection (double pilots and single main injection) is also accurately predictable with the extended 5-zone model. (3) The model is also applicable to HCCI combustion. (4) Execution time is a few minutes/cycle for cases of multi-injection case on a PC, which is acceptable for simulating multi-cycle transient engine performance. (5) A version that is linked to GT-Power software allows more realistic engine simulations, and accurate prediction of HCCI knocking when the switch occurs from a conventional combustion mode to HCCI mode.


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    Title :

    A phenomenological multi-zone PDF model to predict transient behavior of diesel engine combustion


    Additional title:

    Ein phänomenologisches Mehrzonen-Wahrscheinlichkeitsdichtefunktion-Modell zur Vorhersage des transienten Verhaltens der Verbrennung in Dieselmotoren


    Contributors:

    Published in:

    Publication date :

    2007


    Size :

    8 Seiten, 15 Bilder, 2 Tabellen, 15 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English