A comparative study of flame kernel development, flame propagation, and energy release rates for port fuel injected, lean engine combustion reveals effects of intake valve configuration. High speed schlieren motion pictures of combustion in a square piston engine simulator record the flame development histories for three different cylinder heads at two mixture ratios. The three cylinder heads are a four valve head with centralized spark plug, a two valve head with helical swirl intake port, and a two valve head with straight intake port. Observation at two pentane/air mixture ratios, stoichiometric or slightly rich and near the lean limit, compares intake flow and fuel/air mixture effects on combustion processes.Color schlieren motion pictures reveal qualitative features of both the intake flow and combustion event. Image processing of selected frames from black and white schlieren motion pictures produce quantitative burn rate data. Early flame development patterns are markedly different for the different intake valve configurations. Stoichiometric flame kernel development is more than 1.6 times faster than the lean burn case for the four valve head, 1.3 times for the swirl port, and 1.8 for the straight port. Volume burn data show cycle to cycle variations near the lean limit is due to poor flame kernel development rather than poor flame propagation.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effect of Intake Valve Configuration on Lean Combustion


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Iiyama, A. (Autor:in) / Chau, E.L. (Autor:in) / Schipperijn, F.W. (Autor:in) / Nagasaka, R. (Autor:in) / Sawyer, R.F. (Autor:in)

    Kongress:

    SAE International Congress and Exposition ; 1988



    Erscheinungsdatum :

    01.02.1988




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Effects of intake valve configuration on lean combustion

    Chau,E.L. / Schipperijn,F.W. / Nagasaka,R. et al. | Kraftfahrwesen | 1988


    Extension of Lean Burn Range by Intake Valve Offset

    Saito, Hideki / Shirasuna, Takamori / Nomura, Tomokazu et al. | SAE Technical Papers | 2013


    Effects of Intake Ports on In-Cylinder Flow and Lean Combustion in a 4-Valve Engine

    Jeon, Chung-Hwan / Kang, Kern-Yong / Cho, Kyu-Bak et al. | SAE Technical Papers | 1998


    Effects of intake ports on in-cylinder flow and lean combustion in a 4-valve engine

    Jeon,C.H. / Chang,Y.J. / Cho,K.B. et al. | Kraftfahrwesen | 1998


    Particle Reduction in LPG Lean Stratified Combustion by Intake Strategies

    Bae, Choongsik / Park, Sangjae / Lee, Sanguk | SAE Technical Papers | 2019