1317 Influence of boost pressure and EGR ratio on biodiesel combustion

Abstract

The present study investigated the effect of boost pressure and EGR rate on the operation of a small single cylinder DI diesel engine fueled by coconut oil methyl ester (CME). The boost pressures were varied from 100 kPa (naturally aspirated condition) to 130 kPa with a Roots blower type supercharger and the oxygen concentration of the intake air were changed from 21 to 16.9% using a cooled EGR technique. The results show that compared with standard JIS No. 2 diesel fuel, the trade-off relation between the NOx and smoke emissions of the CME improved remarkably at high EGR rate conditions with supercharging.