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Potentials of cooled EGR and water injection for knock resistance and fuel consumption improvements of gasoline engines

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  • Bozza, Fabio
  • De Bellis, Vincenzo
  • Teodosio, Luigi

Abstract

It is well known that the downsizing philosophy allows the improvement of the brake specific fuel consumption (BSFC) at part load operation for spark ignition (SI) engines. On the other hand, the BSFC is penalized at high load because of the knock occurrence and of further limitations on the turbine inlet temperature (TIT). Knock control forces the adoption of a late combustion phasing, causing a deterioration of the thermodynamic efficiency, while the TIT control requires the enrichment of the air-to-fuel ratio (A/F), with additional BSFC drawbacks.

Suggested Citation

  • Bozza, Fabio & De Bellis, Vincenzo & Teodosio, Luigi, 2016. "Potentials of cooled EGR and water injection for knock resistance and fuel consumption improvements of gasoline engines," Applied Energy, Elsevier, vol. 169(C), pages 112-125.
    • Handle: RePEc:eee:appene:v:169:y:2016:i:c:p:112-125
    DOI: 10.1016/j.apenergy.2016.01.129
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    References listed on IDEAS

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