US 12,352,199 B1
Inlet assembly for aftertreatment system
Sharad Mukati, Chennai (IN); and Arun V S ., Chennai (IN)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Sep. 9, 2024, as Appl. No. 18/828,152.
Int. Cl. F01N 3/28 (2006.01); B01D 53/94 (2006.01); B01F 25/40 (2022.01); B01F 25/42 (2022.01); B01F 25/421 (2022.01); B01F 25/422 (2022.01); F01N 1/08 (2006.01); F01N 3/035 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01)
CPC F01N 3/2892 (2013.01) [B01D 53/944 (2013.01); B01D 53/9477 (2013.01); F01N 3/035 (2013.01); F01N 3/106 (2013.01); F01N 3/2066 (2013.01); B01D 2258/012 (2013.01); B01F 25/40 (2022.01); B01F 25/42 (2022.01); B01F 25/422 (2022.01); B01F 25/4231 (2022.01); B01F 25/4233 (2022.01); F01N 1/088 (2013.01); F01N 2240/20 (2013.01); F01N 2330/38 (2013.01); F01N 2490/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An inlet assembly for an aftertreatment system, the aftertreatment system including a diesel oxidation catalyst (DOC) assembly including a first DOC and a second DOC disposed adjacent to the first DOC in a parallel configuration, the inlet assembly including:
an inlet portion adapted to receive a flow of exhaust gases; and
a diffuser plate disposed between the inlet portion and the DOC assembly along an exhaust gas flow path, wherein the diffuser plate includes a body, the body including:
a first section disposed in front of the first DOC, the first section defining a plurality of first holes, wherein each of the plurality of first holes has a first diameter, and wherein each of the plurality of first holes directs a portion of the flow of exhaust gases from the inlet portion towards the first DOC; and
a second section disposed in front of the second DOC, the second section defining a plurality of second holes and an elliptical opening adjacent to the plurality of second holes, wherein each of the plurality of second holes has a second diameter that is different from the first diameter of each of the plurality of first holes, wherein each of the plurality of second holes and the elliptical opening direct a portion of the flow of exhaust gases from the inlet portion towards the second DOC.