This paper describes the Homogeneous charge compression ignition (HCCI) research activities being currently pursued at Lawrence Livermore National Laboratory and at the University of California Berkeley. Current activities include analysis as well as experimental work. HCCI is an old combustion technology that may now be developed with expectations of high efficiency, low NOx, and low particulate matter emissions; in short, an alternative to diesel engines.On analysis, we have developed two powerful tools: a single zone model and a multi-zone model. The single zone model has proven very successful in predicting start of combustion and providing reasonable estimates for peak cylinder pressure, indicated efficiency and NOX emissions. This model is being applied to develop detailed engine performance maps and control strategies, and to analyze the problem of engine startability. The multi-zone model is capable of very accurate predictions of the combustion process, including HC and CO emissions. The multi-zone model has applicability to the optimization of combustion chamber geometry and operating conditions to achieve controlled combustion at high efficiency and low emissions.On experimental work, we have done an evaluation of operating conditions in a 4-cylinder Volkswagen TDI engine. The engine has been operated over a wide range of conditions by adjusting the intake temperature and the fuel flow rate. Satisfactory operation has been obtained over a wide range of operating conditions. Cylinder-to-cylinder variations play an important role in limiting maximum power; expectations are that each cylinder will be individually controlled to achieve best performance.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Current Research in HCCI Combustion at UC Berkeley and LLNL


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Flowers, Daniel L (Autor:in) / Smith, J. Ray (Autor:in) / Girard, James (Autor:in) / Martinez-Frias, Joel (Autor:in) / Au, Michael (Autor:in) / Dibble, Robert (Autor:in) / Aceves, Salvador M. (Autor:in)

    Kongress:

    Future Transportation Technology Conference & Exposition ; 2001



    Erscheinungsdatum :

    2001-08-20




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    2001-01-2511 Current Research in HCCI Combustion at UC Berkeley and LLNL

    Dibble, R. / Au, M. / Girard, J. et al. | British Library Conference Proceedings | 2001


    HCCI Combustion

    Winklhofer, E. | British Library Conference Proceedings | 2003


    Ion Current Sensing for HCCI Combustion Feedback

    Vressner, Andreas / Johansson, Bengt / Bengtsson, Johan et al. | SAE Technical Papers | 2003


    HCCI Combustion

    Winklhofer, E. | British Library Conference Proceedings | 2003


    HCCI combustion

    International Spring Fuels and Lubricants Meeting and Exposition | TIBKAT | 2001