US 12,241,396 B2
Exhaust-gas treatment arrangement
Silas Bräuning, Denkendorf (DE); Wolfgang Datz, Tuebingen (DE); Markus Henzler, Grafenberg (DE); Oleksandr Velyaev, Stuttgart (DE); Tobias Wolf, Koengen (DE); and Arthur Wieland, Baltmannsweiler (DE)
Assigned to Purem GmbH, Neunkirchen (DE)
Filed by Purem GmbH, Neunkirchen (DE)
Filed on Dec. 4, 2023, as Appl. No. 18/528,551.
Claims priority of application No. 10 2022 132 122.3 (DE), filed on Dec. 5, 2022.
Prior Publication US 2024/0183299 A1, Jun. 6, 2024
Int. Cl. F01N 3/20 (2006.01); B01D 53/94 (2006.01); B01F 25/30 (2022.01); B01F 25/431 (2022.01); F01N 3/28 (2006.01); F01N 13/00 (2010.01)
CPC F01N 3/2033 (2013.01) [B01D 53/9418 (2013.01); B01D 53/9436 (2013.01); B01D 53/944 (2013.01); B01F 25/30 (2022.01); B01F 25/431 (2022.01); F01N 3/2066 (2013.01); F01N 3/2892 (2013.01); F01N 13/009 (2014.06); B01D 2251/2067 (2013.01); B01D 2251/208 (2013.01); B01D 2257/404 (2013.01); B01D 2257/406 (2013.01); B01D 2258/012 (2013.01); F01N 2610/02 (2013.01); F01N 2610/03 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An exhaust-gas treatment arrangement for an exhaust gas system of an internal combustion engine, the exhaust-gas treatment arrangement comprising:
a first exhaust-gas treatment unit;
an exhaust-gas treatment assembly downstream of said first exhaust-gas treatment unit;
said first exhaust-gas treatment unit and said exhaust-gas treatment assembly being arranged axially one after another in a direction of a flow-path longitudinal axis (L2) of a flow path including said first exhaust-gas treatment unit and said exhaust-gas treatment assembly;
a hydrocarbon introduction assembly arranged in said flow path axially between said first exhaust-gas treatment unit and said exhaust-gas treatment assembly for introducing hydrocarbon into exhaust gas flowing in said flow path downstream of said first exhaust-gas treatment unit and upstream of said exhaust-gas treatment assembly;
said hydrocarbon introduction assembly having an introduction ring flow channel annularly surrounding said flow-path longitudinal axis (L2);
said introduction ring flow channel being open in an upstream flow-channel end region toward an outlet region of said first exhaust-gas treatment unit and being open in a downstream flow-channel end region toward an inlet region of said exhaust-gas treatment assembly; and,
said hydrocarbon introduction assembly having a hydrocarbon discharging unit for discharging hydrocarbon into said introduction ring flow channel.