Search Results

Starting 2015 all new diesel locomotive have to meet stringent emission requirements of 95% lower particulate and 75% lower NOx. Various approaches [1] and strategies have been implemented by the smaller diesel engine manufacturers to address this requirement. Exhaust gas recirculation (EGR), high pressure injection, multiple injection [2-3] e.t.c are few examples of reducing emissions inside the cylinder. Although this approach is tried by many heavy duty engine manufactures but not the optimal choice at this moment. On the other hand use of controlled after-treatment device has gained huge popularity in the heavy-duty diesel engine world. Most of the in cylinder NOx reduction strategies applied in 4-stroke engine does not translate very well for 2-cycle engine especially due to the scavenging process. Hence advanced simulation tools were used to understand the scavenging process to predict the optimal combustion characteristics to meet future emission standard.