On the potential of ethanol fuel stratification to extend the high load limit in stratified-charge compression-ignition engines

► Effects of ethanol fuel stratification on SCCI were studied with a multi-zone model. ► The model correctly predicted the temperature dependence of ethanol ignition timing. ► Ethanol fuel evaporation increases thermal stratification in an SCCI engine. ► This leads to significant reductions in the PRR and an extended high-load limit. ► The strategy is limited by increased NO formation and reduced combustion efficiency.