Empirical results indicated that the engine emission and fuel efficiency of low-temperature combustion (LTC) cycles can be optimized by adjusting the fuel-injection scheduling in order to obtain appropriate combustion energy release or heat-release rate patterns. Based on these empirical results the heat-release characteristics were correlated with the regulated emissions such as soot, hydrocarbon and oxides of nitrogen. The transition from conventional combustion to LTC with the desired set of heat-release rate has been implemented. This transition was facilitated with the simplified heat-release characterization wherein each of the consecutive engine cycles was analyzed with a real-time controller embedded with an FPGA (field programmable gate array) device. The analyzed results served as the primary feedback control signals to adjust fuel injection scheduling. The experimental efforts included the boost/backpressure, exhaust gas recirculation, and load transients in the LTC region. The impact of heat-release phasing, duration, splitting, and shaping on the combustion-efficiency and cylinder pressure-rise rate was also analyzed with an engine cycle simulation to facilitate the model-based control.


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    Titel :

    Heat Release Pattern Diagnostics to Improve Diesel Low Temperature Combustion


    Weitere Titelangaben:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants


    Beteiligte:
    Reader, Graham T. (Autor:in) / Zheng, Ming (Autor:in) / Kumar, Raj (Autor:in) / Tan, Yuyu (Autor:in)

    Kongress:

    2008 SAE International Powertrains, Fuels and Lubricants Congress ; 2008


    Erschienen in:

    Erscheinungsdatum :

    2008-06-23


    Format / Umfang :

    17 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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