One of the important roles in diesel engine research is the development of a means to reduce the emission of oxides of Nitrogen (NOx). An experimental investigation was carried out to investigate the performance and emission characteristics of a direct injection single cylinder diesel engine using split injection method involving double lobed cam The present results show that NOx can be reduced considerably while causing a minor decrease in engine efficiency. Hence to offset the reduction of Brake thermal efficiency blends of diesel and oxygenated compounds have also been tried and analyzed .Three oxygenated compounds such as Ethyl Aceto Acetate, Diethyl carbonate and Diethylene Glycol were blended with diesel fuel in the proportions 5% & 7%. Double lobed cams were designed and made to inject the fuel in two pulses in the proportion of 40% during pilot injection and 60% during main injection with 8° dwell between two. The engine was tested using Eddy current dynamometer at a speed of 1500 rpm from no load to full load using diesel, 5% and 7% of oxygenated-diesel blends using single injection and split injection.The emission parameters such as  CO, CO₂, HC, and NOx values were measured by using krypton gas analyzer The Smoke Measurement was carried out using AVL 437 smoke meter. The Combustion parameters such as pressure and heat release were analyzed using azectech combustion analyzer.From the investigation, it has been observed that using diesel fuel athigher loads the NOx emission for single injection and split injection are 346ppm and 240ppm respectively  There is a drastic reduction of about 30% in NOx emission. .The brake thermal efficiency is 26.9% for single injection and is reduced to 25.34% in case of split injection. The maximum pressure using single injection is 73.54bar. The maximum pressure using split injection is 61.31bar, a16% drop in maximum cylinder pressure with split injection.As far as oxygenated compound blends which have been used to improve the performance, it is found that 5% Diethyl carbonate gives an optimum increase in Brake thermal efficiency of 26.1%.