Exhaust gas recirculation for enhancing performance of HVOF sprayed zirconium dioxide & aluminium oxide coated internal combustion engine

Abstract

In the present times, a lot of research are being conducted in automobile sector for improving the performance of Internal Combustion Engines. In this paper, an attempt has been made to enhance the performance aspects and reduce emissions of High Velocity Oxy Fuel thermal spray coated piston incorporated Internal Combustion engine, by using Exhaust Gas Recirculation. By using Zirconium Dioxide and Aluminium Oxide, the piston was coated and used in the combustion evaluation experiments. The important internal combustion engine process parameters were optimized by using a central composite design model, which was evaluated using Analysis of variance. The combustion process parameters were optimized so as to enhance the Brake Thermal Efficiency to maximum extent and reduce emission of Oxides of Nitrogen (NOx) to minimum. At optimized combustion process parameters maximum Brake Thermal Efficiency of 29.1% and minimum NOx at 688 ppm, 21.8 ppm of unburnt hydro carbons and 11.08% smoke opacity was observed, which was validated to a very high level of predictability.