Engine operation with spark ignition retarded from MBT timing is used at cold start to reduce HC emissions and increase exhaust gas temperature; however it also results in increased cyclic variations. Steady-state cold fluids testing was performed to better understand the causes of the cycle-to-cycle variations. Detailed analysis of individual cycles was performed to help gain an understanding of the causes of cyclic variations. The important results were:


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    Title :

    SI Engine Operation with Retarded Ignition: Part 1 - Cyclic Variations


    Additional title:

    Sae Technical Papers


    Contributors:
    Lavoie, G. (author) / Russ, S. (author) / Dai, W. (author)

    Conference:

    International Fuels & Lubricants Meeting & Exposition ; 1999



    Publication date :

    1999-10-25




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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