TY - JOUR
TI - Decreasing the emissions of a partially premixed gasoline fueled compression ignition engine by means of injection characteristics and EGR
AU - Nemati Arash
AU - Barzegar Ramin
AU - Khalilarya Shahram
AU - Khatamnezhad Hassan
JN - Thermal Science
PY - 2011
VL - 15
IS - 4
SP - 939
EP - 952
PT - Article
AB - This paper is presented in order to elucidate some numerical investigations  related to a partially premixed gasoline fuelled engine by means of three  dimensional CFD code. Comparing with the diesel fuel, gasoline has lower soot  emission because of its higher ignition delay. The application of double  injection strategy reduces the maximum heat release rate and leads to the  reduction of NOx emission. For validation of the model, the results for the  mean in-cylinder pressure, H.R.R., NOx and soot emissions are compared with  the corresponding experimental data and show good levels of agreement. The  effects of injection characteristics such as, injection duration, spray  angle, nozzle hole diameter, injected fuel temperature and EGR rate on  combustion process and emission formation are investigated yielding the  determination of the optimal point thereafter. The results indicated that  optimization of injection characteristics leads to simultaneous reduction of  NOx and soot emissions with negligible change in IMEP.