US 11,680,508 B2
Exhaust-gas treatment module
Holger Brenner, Stuttgart (DE)
Assigned to Purem GmbH, Neunkirchen (DE)
Filed by Purem GmbH, Neunkirchen (DE)
Filed on May 5, 2022, as Appl. No. 17/737,699.
Claims priority of application No. 10 2021 111 759.3 (DE), filed on May 6, 2021.
Prior Publication US 2022/0356832 A1, Nov. 10, 2022
Int. Cl. F01N 3/28 (2006.01); B01F 25/313 (2022.01); B01F 23/213 (2022.01); B01D 53/94 (2006.01); F01N 3/20 (2006.01)
CPC F01N 3/2892 (2013.01) [B01D 53/9418 (2013.01); B01D 53/9431 (2013.01); B01F 23/2132 (2022.01); B01F 25/31322 (2022.01); F01N 3/2066 (2013.01); F01N 2610/02 (2013.01); F01N 2610/1453 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An exhaust-gas treatment module for an exhaust system of an internal combustion engine, the exhaust-gas treatment module defining an exhaust-gas flow direction and an exhaust-gas treatment module longitudinal axis (L), said exhaust-gas treatment module comprising:
a first exhaust-gas treatment arrangement;
a first mixing path associated with said first exhaust-gas treatment arrangement and having upstream and downstream end regions and defining a first mixing path longitudinal axis (M1);
said first mixing path including a first reactant dispensing arrangement in said upstream end region thereof for dispensing a first reactant;
said first mixing path further including a first mixing channel elongated in a direction of said first mixing path longitudinal axis (M1);
said first exhaust-gas treatment arrangement defining a first exhaust-gas treatment longitudinal axis (A1) and being elongated in a direction of said first exhaust-gas treatment longitudinal axis (A1), said first exhaust-gas treatment arrangement including at least one exhaust-gas treatment unit, at least one exhaust-gas treatment unit of said at least one exhaust-gas treatment unit of said first exhaust-gas treatment arrangement including at least one SCR catalytic converter unit;
said first exhaust-gas treatment arrangement having upstream and downstream end regions and said upstream end region being connected to said downstream end region of said first mixing path;
a second exhaust-gas treatment arrangement;
a second mixing path associated with said second exhaust-gas treatment arrangement and defining a second mixing path longitudinal axis (M2) and having upstream and downstream end regions and said upstream end region thereof being connected to said downstream end region of said first exhaust-gas treatment arrangement;
said second mixing path having a second reactant dispensing arrangement in said upstream end region thereof for dispensing a second reactant;
said second mixing path having a second mixing channel elongated in a direction of said second mixing path longitudinal axis (M2);
said second exhaust-gas treatment arrangement defining a second exhaust-gas treatment arrangement longitudinal axis (A2) and being elongated in a direction of said second exhaust-gas treatment longitudinal axis (A2), said second exhaust-gas treatment arrangement including at least one exhaust-gas treatment unit, at least one exhaust-gas treatment unit of said at least one exhaust-gas treatment unit of said second exhaust-gas treatment arrangement including at least one SCR catalytic converter unit;
said second exhaust-gas treatment arrangement having an upstream end region connected to said downstream end region of said second mixing path and a downstream end region open for releasing at least one of exhaust gas and reactant; and,
wherein said first mixing path, said first exhaust-gas treatment arrangement, said second mixing path and said second exhaust-gas treatment arrangement overlap one another in a direction of said exhaust-gas treatment module longitudinal axis (L), wherein said first mixing path, said first exhaust-gas treatment arrangement, said second mixing path and said second exhaust-gas treatment arrangement are arranged so as to follow one another about said exhaust-gas treatment module longitudinal axis (L) so as to cause said first mixing path and said second mixing path to lie diametrically opposite one another with respect to said exhaust-gas treatment module longitudinal axis (L) and so as to cause said first exhaust-gas treatment arrangement and said second exhaust-gas treatment arrangement to lie diametrically opposite one another with respect to said exhaust-gas treatment module longitudinal axis (L).