Corresponding to the strict vehicle emission regulations, engines with low gas emission are taking the lead in the industry. The engine technology is improved and the material is innovated. Engines in the new generation require half of the specifications in the past to create the same performance and efficiency. Apart from the European and American vehicle companies, Japanese vehicle companies, which mostly used the naturally aspirated engine, have now released T-series automobiles of traditional turbocharger or electric turbocharger. Turbocharger is applicable to any device with engine. In addition to automobiles, turbocharger will also be widely used in ships, airplanes and motorcycles.