Improving liter of power is an important direction that the diesel develops. The regulated two-stage turbo charging technology can notable improves power per liter and the torque of low speed, has already looked upon as one of the technology having a potential comparatively satisfying future vehicle using a request. At present ,in the homeland the research to regulated two-stage turbo charging technology is less, uses high-speed diesel engine first step to design that two stage pressure boost sys...