To run fast cars, we must have a strong impetus. At present the car's power system can be roughly divided into natural intake system and supercharged intake system two categories. In the European sports car, in addition to the BMW auto company still insists on the use of naturally aspirated engines, other car companies in order to enhance the vehicle's dynamic performance, have used supercharging system, for example: Mercedes-Benz sports car using mechanical supercharging system, Saab car is Turbocharging originator. In recent years, Japanese cars are also beginning to extensive use of turbocharger technology. Natural intake system is not installed any form of supercharger, just use the negative pressure generated by the piston down to inhale the mixture. Although natural intake system through the variable valve timing system can get a larger horsepower output, but the power upgrade is limited. In order to effectively increase the engine's output power, the use of booster system can be said that the most effective way.
The most common engine supercharging system has two kinds of supercharger and turbocharger.