Impact of Nozzle Hole Number on Combustion, Performance and Emission in a Diesel Engine, Fueled with Diesel Like Fuel Produced from Waste Engine Oil

An experimental work on the combustion, performance and emission characteristics of single cylinder direct injection (DI) diesel engine carried out, fueled with DLF produced from WEL. The experiments were carried out with four different fuel injectors with 2 hole,3 hole, 4 hole and 5 hole having orifice diameters 0.3 mm, 0.28 mm, 0.25 mm and 0.2 mm. The process parameters such as speed of 1500 RPM and pressure injected was 250 bars and compression ratio of 18 was considered with water cooling system. The engine combustion, performance and emissions are investigated by measuring HRR, cycle peak pressure, BTE, SFC, ITE, NOx, smoke opacity, CO and CO2.As combustion, performance and emission characteristics are concern 3 hole injector performed better results among all other injectors except HRR and CO2.HRR was more in 5 hole injector due to the increasing the number of injecting holes but 5 hole injector emitting more NOx.BTE obtained at rated load point was 30.11 % for 3 hole injector. Smoke and CO were recorded high percentage in two hole injector compared with other injectors. Trade-off between cycle peak pressure and specific fuel consumption with all injectors is not found