US 12,467,397 B2
Exhaust gas aftertreatment device having small cavities
Peter Hirth, Rösrath (DE)
Assigned to Vitesco Technologies GmbH, Regensburg (DE)
Appl. No. 18/571,003
Filed by Vitesco Technologies GmbH, Regensburg (DE)
PCT Filed Jun. 21, 2022, PCT No. PCT/EP2022/066858
§ 371(c)(1), (2) Date Dec. 15, 2023,
PCT Pub. No. WO2022/268799, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 10 2021 206 480.9 (DE), filed on Jun. 23, 2021; and application No. 10 2021 213 769.5 (DE), filed on Dec. 3, 2021.
Prior Publication US 2025/0129734 A1, Apr. 24, 2025
Int. Cl. F01N 3/28 (2006.01)
CPC F01N 3/2803 (2013.01) [F01N 3/28 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A device for aftertreatment of exhaust gases from an internal combustion engine, comprising:
at least one first casing;
a honeycomb body through which a flow can pass along a main flow direction from a gas inlet side to a gas outlet side;
a ceramic mat and with at least one first casing that receives the honeycomb body, wherein the ceramic mat is arranged between the honeycomb body and the at least one first casing and surrounds the honeycomb body as a ring in a peripheral direction,
wherein the ceramic mat is configured such that a cavity formed between the honeycomb body and the at least one first casing is completely filled by the ceramic mat; and
a second casing in which the honeycomb body is received, and the second casing is surrounded by the ceramic mat as a ring in the peripheral direction,
wherein the second casing has, at an end region facing a gas inlet side, a portion having a structure which is different from a remainder of structure of the second casing, wherein the portion has a lower thermal capacity than the remainder of the structure.