3rd TAGRA

Naturally aspirated engines provide adequate performance in urban and highway driving conditions where high power and acceleration are not required. However, when greater acceleration and power are needed, mechanical supercharging can be used to increase engine torque and power. This study investigates the effects of mechanical supercharging on a four-cylinder engine. First, the engine was modeled in GT-Suite, and the simulation results were compared with experimental data. After the model was validated, a mechanical supercharger with an intercooler was incorporated into the engine model. Engine power, torque, brake-specific fuel consumption (BSFC), and emissions of hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOx) were then compared between the naturally aspirated and supercharged configurations. The results indicate that supercharging can substantially increase torque and power, with only modest increases in fuel consumption and some emissions. The greatest increases occurred at 6000 rpm: torque rose from 113 to 208 N·m, while power increased from 95 to 175 hp. On average, brake-specific HC emissions, brake-specific CO emissions, and BSFC increased by 5.4%, 3.7%, and 3.65%, respectively, whereas brake-specific NOx emissions decreased by an average of 10.58%.