A recognised way of improving engine fuel consumption is through the use of high dilution, either lean burn or exhaust gas recirculation (EGR), but conventional engines can only tolerate small amounts of excess air or EGR while maintaining stable operation. A port-injected SI (spark-ignition) engine was modified to improve the dilution tolerance, and hence reduce the fuel consumption, through air motion control. Strong axial and barrel swirl was generated by preventing air flow through one valve, thus giving optimum air motion at the spark plug. Fuel consumption reduction through lean burn improved from 7 % to 11 %; with EGR it improved from 3 % to 7 %. The system was tested at different swirl ratios but there was insufficient time for a full optimisation program. Analysis of air motion using hot-wire anemometry showed that the correct combination of high turbulence and low bulk motion was the key to its operation.


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    Titel :

    High dilution combustion through axial and barrel swirl


    Weitere Titelangaben:

    Magergemischverbrennung durch Axial- und Drallströmung


    Beteiligte:
    Cains, T. (Autor:in) / Richardson, D. (Autor:in) / Wallace, S. (Autor:in)


    Erscheinungsdatum :

    1997


    Format / Umfang :

    10 Seiten, 10 Bilder, 2 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    High dilution combustion through axial and barrel swirl

    Cains, T. / Richardson, D. / Wallace, S. et al. | British Library Conference Proceedings | 1997


    High dilution combustion through axial and barrel swirl

    Cains,T. / Richardson,D. / Wallace,S. et al. | Kraftfahrwesen | 1997


    Numerical study on swirl-type high-dilution stratified EGR combustion system

    Xu,M. / Chen,G. / Daniels,C. et al. | Kraftfahrwesen | 2000


    Numerical Study on Swirl-Type High-Dilution Stratified EGR Combustion System

    Daniels, Chao / Chen, Grant / Dong, Mike et al. | SAE Technical Papers | 2000


    Swirl number effect on the unsteady characteristics of turbulent combustion in axial-swirl combustor

    Ilie, Marcel / McAfee, John W. / Soloiu, Valentin et al. | AIAA | 2024