US 11,725,554 B2
Insert assembly unit for a muffler of an exhaust system of an internal combustion engine
Michael Marquardt-Stammberger, Münsingen (DE); Martin Strähle, Wendlingen am Neckar (DE); and Christian Walter, Fellbach (DE)
Assigned to PUREM GMBH, Neunkirchen (DE)
Filed by Purem GmbH, Neunkirchen (DE)
Filed on Apr. 7, 2021, as Appl. No. 17/224,845.
Claims priority of application No. 10 2020 109 817.0 (DE), filed on Apr. 8, 2020.
Prior Publication US 2021/0317763 A1, Oct. 14, 2021
Int. Cl. F01N 1/08 (2006.01); F01N 13/00 (2010.01); F01N 13/18 (2010.01); G10K 11/16 (2006.01)
CPC F01N 1/08 (2013.01) [G10K 11/161 (2013.01); F01N 2470/02 (2013.01); F01N 2490/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An insert assembly unit for a muffler of an exhaust system of an internal combustion engine, the insert assembly comprising:
a first wall with a circumferential edge area configured for fixing at a circumferential wall of a muffler and with a first mounting bulge;
a second wall arranged at a spaced location from the first wall, wherein the second wall has a circumferential edge area configured for fixing at a circumferential wall of a muffler and has a second mounting bulge; and
an exhaust gas flow unit arranged between the two walls, wherein the exhaust gas flow unit comprises:
a flow duct area with an exhaust gas outer flow opening to be positioned directed towards an opening in a circumferential wall of the muffler;
a first mounting duct area with a first mounting opening for fixing the exhaust gas flow unit at the first wall, the first mounting bulge of the first wall engaging into the first mounting opening of the first mounting duct area; and
a second mounting duct area with a second mounting opening for fixing the exhaust gas flow unit at the second wall, the second mounting bulge of the second wall engaging into the second mounting opening of the second mounting duct area.