Exhaust volume

摘要

An exhaust volume ( 20 ) of the type including a muffler ( 24 ) having a casing provided with an inlet ( 29 ) and an outlet ( 30 ) for passing gases and adapted to enable the muffler to be mounted in an exhaust system ( 14 ). The volume further includes an additional enclosure ( 26 ) forming an accumulation cavity communicating solely with the casing of the muffler ( 24 ) via at least one connection pipe ( 28 ), the additional enclosure ( 26 ) being placed outside the muffler ( 24 ). The additional enclosure ( 26 ) is of a structure whose ability to withstand high temperature is lower than that of the structure of the muffler ( 24 ).