Study of a Turbocharged Common Rail Direct Injection Diesel Engine on Performance and Emission with n-Butanol Diesel Blends

Emissions control from turbocharged diesel engines is an important objective for automotive manufacturers. This is due to the stringent criteria for exhaust emission levels must be met as ordered by the legislated. The purposes of this study are to investigate the effect of diesel fuel blend with n-butanol on performance and emission of four-stroke, turbocharged, water cooled, common rail direct injection diesel engine, and to compare the results with the base diesel fuel. Mixtures of 0%, 5%, 10% and 15% by volume fraction of n-butanol with diesel fuel were evaluated, referred as B0, B5, B10 and B15. Experiments were conducted over a wide range of speeds and loads. The results show that, NOx emission increased for n-butanol blend as compared to the base diesel fuel. At certain n-butanol blend, HC and CO emission increased significantly under low load. B5 blend could be a better option to reduce the emission compared to the base diesel fuel.

Keywords: Diesel; n-butanol; performance; emission.