A simulation model for crankcase scavenged 2-stroke cycle SI engine has been developed to predict the performance and scavenging characteristics. A suitable coupling of scavenging and combustion processes has been achieved to enable these predictions.Scavenging process has been analysed through a 3-phase, that is, displacement, short circuiting and mixing, model capable of taking any combination of these phases. The flow of fresh charge in the exhaust during mixing period is modeled based on ‘S’ shape concept. The back flow through the ports is also considered.The combustion analysis uses quasi-dimensional eddy entrainment concept that includes the basic turbulent parameters.The results concerning the combination of displacement, short circuiting and mixing phases are analysed to judge the scavenging characteristics of the enginefrom its overall parameters. The predictions of cylinder pressure time history at different speeds, equivalence ratios and compression ratios are made. A comparison with experimental results is also made. The predicted and experimental results show good agreement.


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    Title :

    Phenomenological Scavenge-Combustion Model for Two Stroke Cycle S I Engine


    Additional title:

    Sae Technical Papers


    Contributors:
    Gupta, C.P. (author) / Malik, K.A. (author) / Mehta, P.S. (author)

    Conference:

    1988 SAE International Off-Highway and Powerplant Congress and Exposition ; 1988



    Publication date :

    1988-09-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Studying Scavenge Flow in a Two-Stroke Cycle Engine

    Blair,G.P. / Queens Univ.of Belfast,Ashby Inst.,GB | Automotive engineering | 1975


    Studying Scavenge Flow in a Two-Stroke Cycle Engine

    Blair, G. P. | SAE Technical Papers | 1975


    Phenomenological scavange-combustion model for two-stroke cycle S I engine

    Malik,K.A. / Mehta,P.S. / Gupta,C.P. et al. | Automotive engineering | 1988


    Crankcase scavenge target engine

    Ryde, J.L. | Engineering Index Backfile | 1946