Impact of injection timing on simarouba seed oil-fueled CI engine

Abstract

In the present-day of world’s economy, the supply of fossil fuels has reduced considerably due to increased growth rate of industrialization and transportation sector. Market economy has a highest impact due to the huge variation in demand and supply of petroleum-based fossil fuels. In this context, biofuels produced from non-edible vegetable seed oil are gaining more attention to use in generators and transportation sectors with less modification in engines. In the present work, Simarouba Oil Methyl Ester (SuOME) is being considered as fuel to run CI engine by advancing and retarding the injection timing (IT). Raw simarouba seed oil is processed and converted to their methyl ester via two stage transesterification process. Use of SuOME at an IT of 190bTDC, 230bTDC, 270bTDC and 310bTDC resulted in Brake thermal efficiency of 24.96%, 25.25%, 26.32% and 25.75% respectively. Reduction in tail pipe HC and CO emissions by 10% and 15% respectively were recorded for engine operating at IT of 270bTDC than standard IT. Marginal increase of NOx by 1.51% was observed due to the increased combustion temperature. Thus, the advancement of IT is a feasible choice to use SuOME in CI engine with higher performance and reduced toxic emission.