Effect of injection strategy and load on the performance of a common-rail diesel engine fueled with Jatropha curcas biodiesel–diesel blend

Abstract

The present work attempts to determine the optimal engine load, fuel injection pressure (FIP), start of injection timing (SOI) and pilot-main injection intervals (PMII) regarding the performance and emissions of a diesel engine fueled with J20 biodiesel (20 vol% Jatropha curcas biodiesel + 80 vol% 0# diesel). A four-factor and three-level full factorial design and response surface methodology (RSM) were employed in the design of experiments and in the analysis of test results. All the models developed using RSM for measured responses like NO X , Soot, HC, CO emissions, brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE) were determined to be statistically significant by analysis of variance. Interactive effects between load, FIP, SOI and PMII were analyzed using tri-dimensional response surface plots that were fitted using developed multiple regression models. The multi-objective optimization was carried out using the desirability-based approach of the RSM for minimum emissions and BSFC and maximum BTE. The best condition of engine parameters with J20 was load of 65.71%, FIP of 160 MPa, SOI of 4.02 CA and PMII of 4.40 CA. And the optimal values with a high desirability of 0.866 were 1172 ppm, 0.0061 FSN, 2.78 ppm, 17.53 ppm, 203.818 g/kW h and 40.96% for NO X , Soot, HC, CO emissions, BSFC and BTE, respectively.

Energy, Exergy, and Emission Analysis of Biofuels in Compression Ignition Engine with Camphor Oil as Premixing Fuel

“…Based on Xu et al [ 30 ] article's, it was concluded that 160 MPa of injection pressure, 4.02 degree CA at the start of injection, 65.71% loading conditions, and 4.4 degrees CA pilot to main injections produce higher thermal efficiency and lower CO, soot, HC, and NO emissions while using 20% jatropha oil biodiesel blended diesel fuel. “An addition of jatropha oil methyl ester with decanol and n‐propanol with combinations of 45:45:10, 40:40:20, 35:35:30 and 30:30:40 blending ratio in CI engine produces 4% hike in thermal efficiency, in‐cylinder pressure (ICP), and heat release rate (HRR).…”