Experimental investigation, optimization and ANN model prediction of a gasoline premixed waste cooking oil fueled HCCI DI engine
In this study, a Homogeneous charge compression ignition Direct injection (HCCI DI) engine was experimentally investigated with waste cooking oil (WCO) biodiesel and its blends with diesel as the DI fuel and gasoline as the premixed fuel. 20% of the gasoline was introduced as the premixed charge and remaining 80% of the fuel was supplied directly into the cylinder at 23deg before top dead centre (TDC) The experimental results were compared with DI combustion. Early start of combustion (SOC) was observed from the WCO fueled DI combustion. Lean homogeneous combustion from the gasoline premixed HCCI DI engine increased the ebt up to 4.23% compared with DI combustion. NOx emissions decreased up to 11% for the WCO fueled HCCI DI combustion unlike WCO fueled DI combustion. WCO biodiesel fueled HCCI DI combustion emitted 6.67% less HC emissions than diesel fueled DI combustion. ANN modeling was projected to predict the emission and performance characteristics of the gasoline premixed HCCI DI engine. Response surface methodology (RSM) was accustomed to optimize the engine operating parameters.