The combustion and emission improvements for diesel–biodiesel hybrid engines based on response surface methodology

With the rapid technological progress of society and increasingly stringent environmental regulations, further reduction emissions has become an important issue for protection. This study developed a response surface model with biodiesel blending ratio (BBR), load, exhaust gas recirculation (EGR) as independent variables brake thermal efficiency (BTE), specific fuel consumption (BSFC), NO x , CO emission rates dependent variables. Simulations were performed calculated. The results approach objectives maximizing BTE engine minimizing BSFC, emissions, show that when BBR is 20%, EGR rate 15%, load 74.52%, pollutant are significantly reduced while power’s performance maximized.