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Impact of intake valve strategies on fuel consumption and knock tendency of a spark ignition engine

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  • Teodosio, Luigi
  • Pirrello, Dino
  • Berni, Fabio
  • De Bellis, Vincenzo
  • Lanzafame, Rosario
  • D'Adamo, Alessandro

Abstract

Nowadays various technical solutions have been proposed in order to improve the performance of spark-ignition internal combustion engines both at part and full load operations, especially in terms of Brake Specific Fuel Consumption (BSFC). Among the most advanced technical solutions, a fully flexible valve control system (VVA – Variable Valve Actuation) appears a very robust and reliable approach to attain the above aim. In fact advanced valve strategies, such as Early Intake Valve Closure (EIVC) and Late Intake Valve Closure (LIVC), proved to be an effective way to decrease the fuel consumption: at part load through a reduction of the pumping work and, at high load, through a knock mitigation and an over-fueling reduction.

Suggested Citation

  • Teodosio, Luigi & Pirrello, Dino & Berni, Fabio & De Bellis, Vincenzo & Lanzafame, Rosario & D'Adamo, Alessandro, 2018. "Impact of intake valve strategies on fuel consumption and knock tendency of a spark ignition engine," Applied Energy, Elsevier, vol. 216(C), pages 91-104.
    • Handle: RePEc:eee:appene:v:216:y:2018:i:c:p:91-104
    DOI: 10.1016/j.apenergy.2018.02.032
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    4. Li, Yangtao & Khajepour, Amir & Devaud, Cécile, 2018. "Realization of variable Otto-Atkinson cycle using variable timing hydraulic actuated valve train for performance and efficiency improvements in unthrottled gasoline engines," Applied Energy, Elsevier, vol. 222(C), pages 199-215.
    5. d'Adamo, A. & Breda, S. & Berni, F. & Fontanesi, S., 2019. "The potential of statistical RANS to predict knock tendency: Comparison with LES and experiments on a spark-ignition engine," Applied Energy, Elsevier, vol. 249(C), pages 126-142.
    6. Tornatore, Cinzia & Bozza, Fabio & De Bellis, Vincenzo & Teodosio, Luigi & Valentino, Gerardo & Marchitto, Luca, 2019. "Experimental and numerical study on the influence of cooled EGR on knock tendency, performance and emissions of a downsized spark-ignition engine," Energy, Elsevier, vol. 172(C), pages 968-976.
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