RESEARCH ON STEPS TAKEN TO MEET BSIV EMISSION NORMS WITH SINGLE CYLINDER AIR COOLED DIESEL ENGINE & CONVENTIONAL INJECTION SYSTEM

Single cylinder diesel engines are highly fuel efficient & hence are widely used in small 3 & 4 wheelers in India. All 4 wheelers being sold in India should comply Bharat Stage IV (BSIV) emission norms. Current single cylinder air cooled diesel engines meets BSIII emissions. However, it is difficult to meet stringent BSIV emission norms on the vehicles powered with single cylinder air cooled engine due to its inherent design limitations. With this research, a systematic attempt is made to upgrade single cylinder air cooled, diesel engine from BSIII to BSIV emission norms on small 4 wheeler vehicle using simple & cost effective mechanical fuel injection system. This covers changes made in hardware including combustion chamber redesign, nozzle selection, increase in injection pressure, low compression ratio, retarded injection timing, use of EUR, glow plugs & exhaust after treatment to achieve BSIV emission with minimum 10% margin for all the pollutants.