Decreasing the emissions of a partially premixed gasoline fueled compression ignition engine by means of injection characteristics and EGR

Thermal Science

关键词: CI engine;    gasoline fuel;    emission reduction;    combustion;    injection characteristics;    EGR;   

DOI  :  10.2298/TSCI110227099N

来源: DOAJ

【 摘 要 】

This paper is presented in order to elucidate some numerical investigationsrelated to a partially premixed gasoline fuelled engine by means of threedimensional CFD code. Comparing with the diesel fuel, gasoline has lower sootemission because of its higher ignition delay. The application of doubleinjection strategy reduces the maximum heat release rate and leads to thereduction of NOx emission. For validation of the model, the results for themean in-cylinder pressure, H.R.R., NOx and soot emissions are compared withthe corresponding experimental data and show good levels of agreement. Theeffects of injection characteristics such as, injection duration, sprayangle, nozzle hole diameter, injected fuel temperature and EGR rate oncombustion process and emission formation are investigated yielding thedetermination of the optimal point thereafter. The results indicated thatoptimization of injection characteristics leads to simultaneous reduction ofNOx and soot emissions with negligible change in IMEP.

【 授权许可】

Unknown