Mass burning rate was varied by using two single-cylinder engines, each fitted with different combustion-chamber geometries. The slower-burning chamber incorporated a side-mounted spark plug, the faster-burning chamber combined a more compact combustion space and a centrally located spark plug.The faster-burning engine exhibited an improved efficiency-NOx emissions trade-off, primarily due to the engine's higher maximum thermal efficiency and greater tolerance to charge dilution by recirculated exhaust gas.Faster burning also reduced cyclic variability in combustion, increased the knock-limited thermal efficiency, but offered no advantage in regard to hydrocarbon emissions.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Increased Burning Rates Offer Improved Fuel Economy-NOx Emissions Trade-Offs in Spark-Ignition Engines


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    1979 Automotive Engineering Congress and Exposition ; 1979



    Publication date :

    1979-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Increased burning rates offer improved fuel economy - NOx emissions trade-offs in spark-ignition engines

    Tuttle,J.H. / Toepel,R.R. / General Motors,US | Automotive engineering | 1979


    Digital Twin Spark Ignition for Improved Fuel Economy and Emissions on Four Stroke Engines

    Joseph, A. / Ramtilak, A. / Sivakumar, G. et al. | SAE Technical Papers | 2005


    Turbocharging Small Displacement Spark Ignition Engines for Improved Fuel Economy

    Hagemann, G. / Emmenthal, K. -D. / Hucho, W. -H. | SAE Technical Papers | 1979


    Recuperative thottling of spark ignition engines for improved fuel economy

    Guzzella,L. / Betschart,M. / Fluri,T. et al. | Automotive engineering | 2004


    The influence of swirl and fuel type on mass burning rates in spark ignition engines

    Agnew,B. / Chan,C.L. / Tam,I.C.K. et al. | Automotive engineering | 1988