本文从车辆的行驶特性、经济性和环境法等不同的角度阐述了采用机械增压的理由。以较大的篇幅讲述了大众汽车G增压器的工作原理和结构。并以不同的指标对G增压器和其它类型的机械增压器进行比较,进而得出了G增压器具有充气效率高、机械损失适中、可以设置内压缩,转动惯量小、噪音低以及制造成本低廉等优点的结论。并通过将装有G增压器的机械增压发动机进行装车试验,显示了其性能的优越性。 This paper elaborates on the reasons for using supercharger from the perspectives of vehicle driving characteristics, economy and environmental law. With a larger space about the Volkswagen G supercharger working principle and structure. And compares the G supercharger with other types of superchargers with different indexes, and then concludes that G supercharger has the advantages of high aeration efficiency, moderate mechanical loss, internal compression, low moment of inertia, low noise and Manufacturing costs and other advantages of the conclusion. And through the supercharger equipped with a turbocharged engine loading test, showed its superiority of performance.