A car turbocharger is a device that drives a turbine through the exhaust gas to increase the intake air volume and pressure, which can make the engine have higher output power and lower fuel consumption under the same displacement. This is because the turbocharger can increase the effective displacement of the engine, even if the actual displacement of the engine remains unchanged, it can also increase the output power of the engine. At the same time, because the turbocharger can make the engine achieve higher torque at a lower speed, it can reduce the working intensity and wear of the engine, prolong the life of the engine, and reduce the fuel consumption and emissions of the engine.