Study of combustion, performance and emissions characteristics of oxygenated constituents and methanol fumigation in the inlet manifold of a diesel engine

Abstract

To understand the aspect of methanol fumigation on diesel engine characterization, various percentages of methanol were injected from the inlet manifold, while the blend of Pine and Eucalyptus oil in diesel(P10E10D80) was injected from the main injector and used as a new source of biofuel. The cetane number and viscosity of the oil blend were found to have lower values than fossil diesel. The study envisages vaporization of oil blend and its induction into the diesel engine while P10E10D80 was used for the facilitation of ignition to the methanol-air mixture. The Sauter Mean Diameter of P10E10D80 was found to be lower than conventional diesel and thus was supposed to be more suitable for the evaporation of methanol and hence, by methanol fumigation studies. The study revealed that at 20% to 100% load, the use of methanol could replace 39% to 56% of P10E10D80, respectively, and subsequently improve the Brake Specific Energy Consumption(BSEC ;17%), brake thermal efficiency (BTE; 2.56%), Exhaust Gas Temperature(EGT;8.92%), Carbon Monoxide (CO;42%), Oxide of Nitrogen(NOx ;3.57%), Besides, the combustion of fumigated methanol was found to exhibiting 11.54% higher in-cylinder pressure and higher Heat Release Rate (HRR;22%) 39% at full load.