Car turbocharger can increase the power output of an engine by 40%. This is because the turbocharger can make the engine take in more air, thereby increasing the amount of combustible mixture, so that the thrust generated by the explosion in each working cycle is greater, thereby increasing the torque and power of the engine. Generally speaking, each increase in boost pressure by 1 atmosphere (about 14.7 psi) can increase the power of the engine by about 35%. Therefore, after using the turbocharger, the engine can output greater power with a smaller displacement, so as to achieve the purpose of light weight and high efficiency. Automobile turbocharger is a technology to increase the power density of the engine, which can effectively expand the working range and output level of the engine.