Double -shell automobile muffler

The utility model discloses a double -shell automobile muffler, including shell body and interior casing, it has soundproof cotton to pack between shell body and the interior casing, be equipped withcirculating cooling water pipe between shell body and the interior casing, the inner shell is internal to be equipped with preceding baffle, median septum and back baffle, the bottom of preceding baffle is equipped with the through -hole, it has the amortization cotton to pack between median septum and the back baffle, the front end of interior casing is equipped with the intake pipe, the rear endof intake pipe is connected with the reposition of redundant personnel chamber of admitting air, the inner shell is internal to be equipped with all the first honeycomb duct that extends along the fore -and -aft direction, second honeycomb duct and third honeycomb duct, interior body case rear's bottom is equipped with main exhausting pipe, the end connection that main exhausting pipe stretches out the shell body has tail