Parametric study and optimization of the main engine calibration parameters and compression ratio of a methane-diesel dual fuel engine

The results show a significant impact of the CR, EGR and A/F ratio variables on the unburned hydrocarbons reduction (up to 40%) compared to the DF baseline. Benefits in terms of CO2 and particles distributions are shown with respect to the CDC. The CH4 slip on greenhouses gas (GHG) and the emissions and fuel consumption estimation over the New European Driving Cycle (NEDC) are considered. The information reported in this paper has a relevant impact on the development advanced combustion engines running under natural gas - diesel dual fuel combustion mode and transferable in modern light-duty engines, giving as output the main engine calibration parameters and CR that most influence the efficiency and pollutant emissions formation in a DF engines.