ABSTRACT

Diesel engines are a major source of urban air pollution. The engine exhaust gases contain oxides of nitrogen (Nitric oxide, NO and small amount of nitrogen-di-oxide, NO₂-collectively known as NOx), Carbon monoxide (CO) and particulate matter. Among this, NOx is a prominent exhaust emission problem. The heavy duty highway engine manufacturers can achieve substation emission reduction.The procedure for emission control are exhaust gas treatment, engine modification, fuel modification. The prime objective of this thesis is to reduction of emission especially NOx by fuel modification. Here fuel modification system include using aqueous salt solution. The engine was running at 50% constant load at variable speed. By this procedure formation of NOx is reduced, CO is increased, BSFC is reduced, exhaust temperature is reduced  compared to neat diesel and also the efficiency of diesel engine is increased. 

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