Performance and emission characteristics of HCCI engine with exhaust gas recirculation fueled with Butanol and Diesel

Homogeneous charge compression ignition is new combustion concept, which is used to reduce the emissions and improve the engine performance parameters. HCCI combustion technology reduces CO2 and NOx emissions also reduces exhaust gas temperature. In HCCI mode Combustion takes place at each and every place in combustion chamber so overall temperature inside the cylinder is reduced therefore NOX is reduced. In Exhaust Gas Recirculation (EGR) some amount of exhaust gas is recirculated inside the cylinder after passing through the EGR cooler. Partially cooled EGR is introduced in combustion chamber.CO2 from the exhaust gas will absorb the heat of the combustion chamber and overall temperature inside the engine cylinder is reduced. HCCI and EGR combine together will reduce NOx and CO2 meanwhile HC and CO increases. The engine is run at its conventional mode and at HCCI mode with both Diesel-Bio fuel HCCI. Percentage of HCCI is introduced according to energy input per second. From that engine runs at 10%, 30%, 50%, 70%, 90% HCCI. Simultaneously partially cooled EGR is introduced with 10%, 15% and 20%. Effect of HCCI and EGR is noted on engine performance parameters and emissions. The optimum condition is obtained at 20% EGR and 30% HCCI.