DEVELOPMENT OF MULTI CYLINDER CRD-I ENGINE TO MEET EURO VI EMISSION NORMS

Direct injection diesel engine offers the benefit of better fuel economy over gasoline engine. Diesel engine with electronic control of high press ure, multiple injections per cycle, 4valves per cylinder, turbocharged with intercooled, cooled EGR or SCR and DPF have now become the key features to meet the upcoming emissions in India. This paper describes the work done on multi-cylinder diesel engine to meet the requirements of Bharat stage 5 emissions and has the potential to meet Euro6 emission norms. Vehicle simulation model developed by using LOTUS simulation was used to find out the engine steady state speed-load point’s equivalent to Bharat stage 5 emission test cycle. Engine emission development was done on test bench using these speed-load points. Engine was optimized with new hardware, namely piston bowl with reduced compression ratio, high capacity EGR cooler and turbocharger to attain the desired emission level. Diesel oxidation catalyst and coated diesel particulate filter (cDPF) loading were optimized to reach Bharat stage 5 emission norms. Vehicle with Selective Catalyst Reduction (SCR) with average 60% conversion efficiency has the potential to meet Euro6 norms.