US 11,691,120 B1
Exhaust gas aftertreatment systems
Robert G. Sperry, Columbus, IN (US); Chetan Kishorrao Chawane, Pune (IN); Karan Shaileshkumar Chinaiwala, Surat (IN); and Enoch Nanduru, Pune (IN)
Assigned to CUMMINS EMISSION SOLUTIONS INC., Columbus, IN (US)
Filed by Cummins Emission Solutions Inc., Columbus, IN (US)
Filed on Dec. 20, 2021, as Appl. No. 17/556,692.
Int. Cl. B01J 19/26 (2006.01); F01N 3/20 (2006.01); B01J 19/18 (2006.01); B01D 53/94 (2006.01)
CPC B01J 19/26 (2013.01) [B01D 53/944 (2013.01); B01D 53/9431 (2013.01); B01J 19/1862 (2013.01); F01N 3/2066 (2013.01); B01J 2219/1943 (2013.01); B01J 2219/1946 (2013.01); F01N 2240/20 (2013.01); F01N 2260/18 (2013.01); F01N 2330/38 (2013.01); F01N 2610/02 (2013.01); F01N 2610/08 (2013.01); F01N 2610/146 (2013.01); F01N 2610/1453 (2013.01); F01N 2610/1493 (2013.01); F01N 2900/14 (2013.01); F01N 2900/1806 (2013.01); F01N 2900/1824 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An exhaust gas aftertreatment system comprising:
a housing assembly comprising:
an upstream housing,
a first inlet tube coupled to the upstream housing and configured to receive a first portion of exhaust gas from the upstream housing,
a second inlet tube coupled to the upstream housing and configured to receive a second portion of the exhaust gas from the upstream housing, and
a mixing housing coupled to the first inlet tube and the second inlet tube, the mixing housing configured to receive the first portion of the exhaust gas from the first inlet tube and receive the second portion of the exhaust gas from the second inlet tube, the mixing housing separated from the upstream housing by the first inlet tube and the second inlet tube; and
a reductant delivery system comprising a dosing module coupled to the mixing housing and positioned between the mixing housing, the first inlet tube, and the second inlet tube, the dosing module comprising an injector configured to provide reductant into the mixing housing.
 
9. An exhaust gas aftertreatment system comprising:
a housing assembly comprising:
an upstream housing centered on an upstream housing axis,
a first inlet tube coupled to the upstream housing and configured to receive a first portion of exhaust gas from the upstream housing,
a second inlet tube coupled to the upstream housing and configured to receive a second portion of the exhaust gas from the upstream housing,
a mixing housing coupled to the first inlet tube and the second inlet tube, the mixing housing configured to receive the first portion of the exhaust gas from the first inlet tube and receive the second portion of the exhaust gas from the second inlet tube, and
a divergent housing configured to receive the exhaust gas from the mixing housing, the divergent housing having a diameter that increases as a distance from the mixing housing increases; and
a reductant delivery system comprising a dosing module coupled to the mixing housing, the dosing module comprising an injector configured to provide reductant into the mixing housing.