Simultaneous reduction of NOx and smoke emission of CI engine fuelled with biodiesel

Abstract

In the present work an attempt was made to reduce the NOx and smoke emission of CI engine fuelled with biodiesel through combined effect of fuel injection timing and EGR. Fuel injection timing was advanced to inject the fuel well before the manufacturers recommended injection timing and exhaust gases were introduced at this timing and their combined effect on performance and emission parameters of the engine were investigated. Significant reduction in smoke density was observed at the advanced injection timing with increased NOx emission. It was also observed that when exhaust gases were admitted at advanced injection timing, NOx emission of the engine was decreased with marginal increase in smoke density. This increased smoke density resulted from EGR was marginally higher than the smoke density of the engine at standard injection timing.