US 12,012,887 B2
Systems and methods for providing uniform exhaust gas flow to an aftertreatment component
Reshma Pattan, Chebrolu (IN); Ryan M. Johnson, Cottage Grove, WI (US); Mahendra Mittapalli, Pune (IN); and Priyanka S. Kujur, Gumla (IN)
Assigned to CUMMINS EMISSION SOLUTIONS INC., Columbus, IN (US)
Appl. No. 17/626,956
Filed by CUMMINS EMISSION SOLUTIONS INC., Columbus, IN (US)
PCT Filed Jul. 15, 2019, PCT No. PCT/US2019/041818
§ 371(c)(1), (2) Date Jan. 13, 2022,
PCT Pub. No. WO2021/010964, PCT Pub. Date Jan. 21, 2021.
Prior Publication US 2022/0356831 A1, Nov. 10, 2022
Int. Cl. F01N 3/28 (2006.01)
CPC F01N 3/2892 (2013.01) [F01N 3/2882 (2013.01); F01N 2240/20 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An inlet assembly for an aftertreatment system that comprises a housing containing an aftertreatment component, the inlet assembly comprising:
an inlet conduit configured to be disposed substantially perpendicular to a longitudinal axis of the housing;
a flow redirection conduit disposed downstream of the inlet conduit and coupled thereto, the flow redirection conduit configured to be coupled to the housing and redirect exhaust gas received from the inlet conduit towards an inlet face of the aftertreatment component,
wherein the flow redirection conduit comprises a sidewall configured to be located opposite to the inlet face of the aftertreatment component,
wherein the inlet conduit is configured to provide exhaust gas to the flow redirection conduit at a location between the sidewall and the inlet face of the aftertreatment component,
wherein the sidewall comprises a plurality of protrusions projecting in a direction substantially parallel to the longitudinal axis of the housing, the plurality of protrusions being configured to distribute exhaust gas flow towards the inlet face of the aftertreatment component as the exhaust gas flows between the plurality of protrusions and is redirected towards the inlet face, and
wherein the plurality of protrusions are arranged in a set of rows on the sidewall, each row including a set of the plurality of protrusions and being substantially perpendicular to the longitudinal axis.