The turbocharger is driven by the exhaust energy of the engine, which is called exhaust turbocharging (or turbocharging). As shown in the figure, there is an exhaust turbocharging system. Exhaust turbocharging features no mechanical connection between the turbocharger and the engine. They are connected by an air route. Since the work consumed by the compressor is part of the energy recovered by the turbine from the exhaust gas, turbocharged engines can not only increase the engine's power, but also improve its thermal efficiency and reduce fuel consumption. If you see a Turbo or T logo in the back of the car, it indicates that the engine is turbocharged. The turbocharger is actually an air compressor, which USES the exhaust gas from the engine to push the turbine. The turbine in turn drives the coaxial impeller to compress the air from the air filter pipe, so that the air is pressurized and enters the cylinder. When the engine speed increases, the exhaust gas speed and the turbine speed also increase synchronously, the impeller will compress more air into the cylinder, the air pressure and density increase can burn more fuel, the corresponding increase in refueling volume and adjust the engine speed, you can increase the engine output power.
This paper by guilin new ronghuang machinery co., LTD