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

Fabio Bozza, Vincenzo De Bellis and Luigi Teodosio

Applied Energy, 2016, vol. 169, issue C, 112-125

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.

Keywords: Engine downsizing; Knock; 1D model; Cooled EGR; Water injection (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (40)

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DOI: 10.1016/j.apenergy.2016.01.129

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