US 11,982,219 B2
Systems and methods for mixing exhaust gases and reductant in an aftertreatment system
Z. Gerald Liu, Madison, WI (US); Apoorv Kalyankar, Madison, WI (US); Achuth Munnannur, Madison, WI (US); Niklas M. Schmidt, Madison, WI (US); Roy W. Detra, Stoughton, WI (US); and Mihai Chiruta, Madison, WI (US)
Assigned to CUMMINS EMISSION SOLUTIONS INC., Columbus, IN (US)
Filed by CUMMINS EMISSION SOLUTIONS INC., Columbus, IN (US)
Filed on Nov. 29, 2022, as Appl. No. 18/071,189.
Application 17/400,567 is a division of application No. 16/618,716, granted, now 11,136,910, issued on Oct. 5, 2021, previously published as PCT/US2018/035959, filed on Jun. 5, 2018.
Application 18/071,189 is a continuation of application No. 17/400,567, filed on Aug. 12, 2021, granted, now 11,542,847.
Claims priority of provisional application 62/515,743, filed on Jun. 6, 2017.
Prior Publication US 2023/0108543 A1, Apr. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F01N 3/28 (2006.01); F01N 3/20 (2006.01)
CPC F01N 3/2803 (2013.01) [F01N 3/208 (2013.01); F01N 3/2892 (2013.01); F01N 3/2066 (2013.01); F01N 2240/20 (2013.01); F01N 2470/30 (2013.01); F01N 2610/02 (2013.01); F01N 2610/1453 (2013.01); F01N 2610/146 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A multi-stage mixer comprising:
a multi-stage mixer inlet configured to receive exhaust gas;
a multi-stage mixer outlet configured to provide the exhaust gas to a catalyst; and
a first flow device configured to receive the exhaust gas from the multi-stage mixer inlet and configured to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device, the first flow device comprising:
a body comprising:
a cylindrical portion and an exhaust gas guide aperture positioned in the cylindrical portion, the exhaust gas guide aperture configured to receive the reductant, and
a frustoconical shroud downstream of the cylindrical portion,
a first hub positioned within the body,
a plurality of first vanes positioned within the body upstream of the exhaust gas guide aperture, each of the first vanes coupled to the first hub, at least one of the first vanes coupled to the body, the at least one of the first vanes being coupled to the cylindrical portion,
a plurality of first vane apertures, each of the first vane apertures positioned between adjacent ones of the first vanes,
a second hub positioned within the body,
a plurality of second vanes positioned within the body downstream of the exhaust gas guide aperture, each of the second vanes coupled to the second hub, at least one of the second vanes coupled to the body, the at least one of the second vanes being coupled to the frustoconical shroud, and
a plurality of second vane apertures, each of the second vane apertures positioned between adjacent ones of the second vanes.