Influence of different nozzle hole orifice diameter on performance, combustion and emissions in a diesel engine

Abstract

In this article, the experimental tests were carried out to explore the performance, combustion and emissions by modifying the different nozzles hole size injectors such as (3 holes × Ø = 0.20 mm (modified)), (3 holes × Ø = 0.28 mm (Base)) and (3 holes × Ø = 0.20 mm (modified)). The experiments are performed on Kirloskar 4-stroke computerised solitary cylinder diesel engine fuelled with diesel at 1500 rpm, water-cooled direct injection diesel engine with eddy current dynamometer with the standard injection timing of 23° bTDC with an injection pressure of 210 bar was maintained constant throughout the experiment. From the results, it was pointed out that in all the three different nozzles (3 holes × Ø = 0.20 mm (modified)) improves the vaporisation, atomisation and air-fuel mixing are resulting in a shorter duration. The impressive results are seen in the performance, combustion and emissions. The only negative aspect is the NOx increasing with small orifice Nozzle Hole Diameter.