Experimental and Simulation Analysis of Natural Aspirated Diesel Engine for Fuel Economy Improvement

The paper presents the investigation of the engine fuel efficiency improvement using one-dimensional (1D) simulation software Ricardo Wave. The study is carried out for a baseline multicylinder direct-injection naturally aspirated diesel engine of 2945 cc meeting CPCB-II emission norms. Initially base simulation model is calibrated and good correlation is observed between experimental and simulation results for parameters like airflow rate and engine power cylinder pressure. Engine breathing capability, i.e. volumetric efficiency, is improved by optimizing intake pipes, intake ports and cam events. Cam-lobe profile is optimized keeping consideration of gen-set/tractor application. Optimum hardware improved engine pumping losses which results in better fuel efficiency on various load points. It meets CPCB-II emission norms.