Patent ID: 7997383

Claim:
An exhaust system for a vehicle, the exhaust system comprising: an exhaust pipe connectable to an engine of the vehicle; a silencer connected to the exhaust pipe, the silencer including an outer housing and an inner core accommodated in the outer housing, and a plurality of through-holes are provided along a length P of a side wall of the inner core; a sound absorbing material arranged on an outer surface of the inner core; an air space provided between an outer surface of the sound absorbing material and an inner surface of the outer housing; a partition provided on the outer surface of the sound absorbing material to separate the sound absorbing material and the air space, wherein a plurality of through-holes are provided along a length Q of a side wall of the partition such that exhaust gases can pass from within the inner core to the air space through the plurality of through-holes of the inner core, the sound absorbing material, and the plurality of through-holes of the partition; and a tail pipe arranged to project from a downstream end of the silencer, the tail pipe having a smaller outer dimension than an inner dimension of the inner core, a portion of the tail pipe extending within the inner core; wherein the length Q of the partition including the plurality of through-holes is longer than the portion of the tail pipe extending within the inner core; and the length P of the side wall of the inner core is not equal to the length Q of the side wall of the partition; and the length P and the length Q extend to a same downstream point of the silencer.