Estudo do desempenho de motores de ignição por centelha com sobrealimentação mecânica e turboalimentação

Abstract

Automobiles, since its creation, always had an important role in the history, being crucial for the development of society, for such cars has been a target of intense technologic studies. The automobile industry faces now a challenging scenario, having to adapt to laws about control and emission of pollutes, dealing with the fuel’s price rise and with the constant seek of cars with more efficiency and performance. For this purpose, the industry has been heavily investing supercharging of engines, as a clever alternative to the increase of performance, efficiency, economy and polluting emission. This work presents a comparative study of the performance of spark ignition engines using mechanical supercharging and turbochargers, relating which application one is more appropriate, comparing in which range of rotation one has its most efficiency and analyzing the costs. This work consists of the simulation of a supercharged engine through motor simulation software, the model is based on “Filling-and-Emptying” method, that allows the generation of torque and power curves, as well as others relevant parameters that will be shown in this work.