Evaluation of CI Engine Performance, Emissions, and Combustion Characteristics Using Corn Biofuel Blend with Divergent Cr's and Exhaust Gas Recirculation

This thesis investigates the potential of corn oil biodiesel as a renewable alternative fuel for diesel engines. An experimental study is conducted to enhance engine characteristics blended through various approaches, including adjusting compression ratio, employing different exhaust gas recirculation (EGR) rates, and incorporating Nano additives into fuel. Preliminary examinations methyl ester (COME) blends at 10%, 20%, 30% reveal that COME20 blend outperforms others, establishing it preferred further investigation. Subsequently, investigation proceeds with load speed conditions. The results demonstrate notable improvements in performance. Specifically, ratio 20:1 (CR20:1) compared 18:1 (CR18:1), brake thermal efficiency increases by 2.72%, brake-specific consumption (BSFC) decreases 7.8%. Furthermore, significant reductions emissions, carbon monoxide (17.64%), unburnt hydrocarbons (13.8%), smoke opacity (3.5%), are observed. However, there an increase nitrogen oxides (NOx) emissions. In terms (EGR), addition 6% 12% EGR COME20-CR20 reduced NOx emissions diesel. Notably, exhibits greater reduction but compromises performance extent than EGR. conclusion, this highlights optimizing design (compression ratio), control (EGR rate), reformulation (COME blending) facilitate efficient utilization COME ignition (CI) findings contribute advancement technologies offer insights future developments field sustainable transportation. KEYWORDS: Corn biodiesel, Renewable fuel, BSFC (Brake-specific consumption), Compression Exhaust additives,