Blast pipe sound -attenuating structure and motor vehicle

The utility model provides a pair of blast pipe sound -attenuating structure and motor vehicle relates to automobile manufacturing technical field, including back silencer and preceding blast pipe, back silencer includes the noise elimination casing, and blast pipe mouth before being provided with on the noise elimination casing, preceding blast pipe are connected on the mouth of pipe that exhausts in the front, still be provided with the first final vacuum mouth of pipe and the second final vacuum mouth of pipe on the noise elimination casing, the first final vacuum mouth of pipe and the second final vacuum mouth of pipe are used for connecting the back row trachea respectively. According to the technical solution, for the noise that can improve motor vehicle blast pipe part, so set up the first final vacuum mouth of pipe and these two final vacuum mouths of pipe of the second final vacuum mouth of pipe on connecting front -seat tracheal back silencer, go on the exhaust to shunt through the first final vacuu