Experimental measurements of burn rates have been carried out in a single cylinder homogeneous charge engine. Three different combustion chambers were investigated (75 % and 60 % squish bowl-in-piston chambers and a disk chamber) using a cylinder head with a swirl producing intake port and near central spark location. Data were obtained with each combustion chamber as a function of spark timing, EGR, and load at 1500 RPM.The combustion rate is strongly influenced by chamber shape. The 10-90 % burn durations of the 75 % and 60 % squish chambers are respectively about 40 % and 60 % that of the disk chamber. Chamber configuration had less effect on 0-10 % burn duration. The disk had about 25 % longer 0-10 % burn time than the bowl-in-piston chambers.Modifications to the GESIM model enabled good overall agreement between predictions and experimental data, a rather severe test of the model because the coupling of fluid mechanics, combustion and chamber geometry must be properly modeled. An improved basic understanding of the influence of combustion chamber shape on burn rate has been achieved through the interactive use of experimental data and modeling. The results suggest that differences in turbulence intensity and flame area development due to changes in chamber shape are responsible for the observed burn rate differences.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Combustion Chamber Effects on Burn Rates in a High Swirl Spark Ignition Engine


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1983



    Publication date :

    1983-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Combustion Chamber effects on burn rates in a high swirl spark ignition engine

    Belaire,R.C. / Davis,G.C. / Kent,J.C. et al. | Automotive engineering | 1983


    Combustion chamber design for a lean-burn spark ignition engine

    Evans,R.L. / Univ.of British Columbia,CA | Automotive engineering | 1992


    The effect of swirl on spark-ignition engine combustion

    Hamamoto,Y. / Tomita,E. / Tanaka,Y. et al. | Automotive engineering | 1985


    Cyclic Variations in a Lean-Burn Spark Ignition Engine Without and With Swirl

    Xu, H. M. / Whitelaw, J. H. | SAE Technical Papers | 1995


    Cyclic variations in a lean-burn spark ignition engine without and with swirl

    Whitelaw,J.H. / Xu,H.M. / Imperial College,London,GB | Automotive engineering | 1995