Effect of split fuel injection strategies on the diverse characteristics of CRDI diesel engine operated with tamarind biodiesel
Katuru Bala Prasad, Oliva Meduri, V. Dhana Raju, Aruna Kumari Azmeera, Harish Venu, Lingesan Subramani, Manzoore Elahi M. Soudagar
Abstract
The demand for petroleum fuels has been rapidly increasing owing to the wide use of automobiles and other agricultural engines which prefer diesel as a major fossil fuel. This research work investigates the effect of change in the fuel injection strategies on CRDI engine under various loads with tamarind seed methyl ester (TSME) 20% biodiesel blend. Initially, the diesel fuel is injected at 600 bar with 30% pilot injection (P.I) and 100% main injection (M.I). Later, TSME20 is injected at the same pressure with the two injection strategies mentioned. This study discloses that the BTE has boosted by 4.79% with 30% pilot injection than 100% main injection for the tested biodiesel. Further, TSME20 biodiesel at 30% pilot injection has shown significant reduction of hydrocarbons by 12.16%, carbon monoxide by 32.14% and smoke emissions by 19.71% when compared with 100% diesel main injection at peak load conditions. However, the pilot injection for the tested fuels has exposed slight enhancement in NOX emissions, which may be reduced by exhaust gas recirculation (EGR). Hence, the use of 30% pilot injection of TSME20 biodiesel is recommended for diesel engines as an alternative fuel which has improved performance along with reduced emissions.