This paper explores the combined effects of boosting, intake air temperature, trapped residual gas fraction, and dilution on the Maximum Pressure Rise Rate (MPRR) in a boosted single cylinder gasoline HCCI engine with combustion controlled by negative valve overlap. Dilutions by both air and by cooled EGR were used. Because of the sensitivity of MPRR to boost, the MPRR constrained maximum load (as measured by the NIMEP) did not necessarily increase with boosting. At the same intake temperature and trapped residual gas fraction, dilution by recirculated burn gas was effective in reducing the MPRR, but dilution by air increased the value of MPRR. The dependence of MPRR on the operating condition was interpreted successfully by a simple thermodynamic analysis that related the MPRR value to the volumetric heat release rate.


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    Title :

    On the Maximum Pressure Rise Rate in Boosted HCCI Operation


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2009 Powertrains Fuels and Lubricants Meeting ; 2009



    Publication date :

    2009-11-02




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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