Exhaust gas treating unit e.g. silencer, for internal combustion engine, has one inner infundibuliform part applied on associated outer infundibuliform part in contact zone between extreme regions located at gas passages` and case`s sides

摘要

The unit has a case with outer infundibuliform parts (4, 5), coupled to exhaust gas passages of an exhaust system. The parts have inner infundibuliform parts (10, 11) placed in the parts` (4, 5) extreme regions (12, 12`) located at the passages` side. The regions are spaced from extreme regions (13, 13`) located at the case`s side. The part (10) is applied on the part (4) in a contact zone (15) placed between the regions (12, 13).