The exhaust emissions from a single-cylinder spark ignition engine were measured as a function of burning time. Flame propagation time was measured with an ionization probe, and the exhaust gas was sampled with a gas sampling valve. Electronic control logic determined the cycles to be sampled, based on the flame propagation time. Tests were carried out at full throttle, for lean, optimum, and rich A/F. The exhaust components measured were CO, HC, O2, H2, and N2 using a gas chromatograph.The emission most affected by CBCV is CO. Cycles that are either faster or slower than the mean cycle have increased CO, particularly at lean A/F where a five-fold difference in CO concentration was measured. HC emissions show a 150% change for the same conditions. For other than lean A/F operation, H2 was an exhaust product, up to 6% at rich A/F operation.It is well established that reductions in CBCV would improve efficiency and power output. Here it is established that a reduction in CBCV would also reduce overall CO and HC emissions, particularly for very lean operation.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Cycle by Cycle Variability in Emissions of a Spark Ignition Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Milkins, E. E. (Autor:in) / Watson, H. C. (Autor:in) / Goldsworthy, L. C. (Autor:in) / Hallworth, R. J. (Autor:in)

    Kongress:

    International Automobile Engineering and Manufacturing Meeting ; 1974



    Erscheinungsdatum :

    1974-02-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Cycle by Cycle Variability in Emission of a Spark Ignition Engine

    Melbourne University | Kraftfahrwesen | 1974


    LES Modelling of Spark-Ignition Cycle-to-Cycle Variability on a Highly Downsized DISI Engine

    d'Adamo, Alessandro / Cantore, Giuseppe / Breda, Sebastiano et al. | SAE Technical Papers | 2015


    Cycle by Cycle Variations of Flame Propagation in a Spark Ignition Engine

    Petrovic,S. / Univ.Belgrad,YU | Kraftfahrwesen | 1982



    Cycle-by-Cycle Variations of a Spark Ignition Engine - A Statistical Analysis

    Kenemuth, D. K. / Barton, R. K. / Lestz, S. S. et al. | SAE Technical Papers | 1970