Effects of Carbon dioxide, Nitrogen and Exhaust gas with intake air on DI Diesel Engine Emission and Performance Characteristics

The present work reports the emission and performance characteristics of a direct injection (D.I) diesel engine operating with maximum proportions of carbon dioxide (CO₂), nitrogen (N₂), and exhaust gas with intake air. The test was conducted on a direct injection (DI) diesel engine for various proportions of CO₂, N₂, and exhaust gas from no load to full load under a constant speed of 1500 rpm. The proportions of CO₂, N₂, and exhaust gas were varied up to 10, 20 and 15 percent by volume respectively with intake air. The results revealed that the addition of CO₂, N₂, and exhaust gas with intake air causes large reduction in oxides of nitrogen (NO_X) and increase in smoke, carbon monoxide (CO), unburnt hydrocarbon (HC) emissions. The performance characteristics revealed that brake thermal efficiency (BTE) decreases and brake specific fuel consumption increases (BSFC) with an increasing amount of CO₂, N₂, and exhaust gas. Also it was noticed from the present investigation that when the percentage of CO₂, N₂, and exhaust gas exceeds 10, 20, 15 respectively causes engine misfire occur under full load condition.