Granted Patent B2

US 12,281,605 · App. 18/291,362 · Granted Apr 22, 2025

Inventors: Z. Gerald Liu (Madison, WI); Apoorv Kalyankar (Madison, WI); Achuth Munnannur (Verona, WI); Niklas Schmidt (Madison, WI)

Assignee: CUMMINS EMISION SOLUTIONS INC.

F01N3/20F01N3/021F01N13/08

Abstract

Claims (133)

1. An exhaust gas aftertreatment system comprising:

an introduction conduit centered on a conduit center axis;

a dosing module coupled to the introduction conduit and comprising an injector that is configured to provide a treatment fluid into the introduction conduit and that is defined by an injection axis;

a mixer disposed within the introduction conduit and comprising a mixer body configured to receive exhaust gas and the treatment fluid; and

an outlet flange comprising:

an outlet flange body centered on an outlet flange center axis, the outlet flange body comprising:

an outlet flange body inner portion coupled to the mixer body and extending radially outward from the mixer body,

an outlet flange body outer portion coupled to the introduction conduit, separating the outlet flange body inner portion from the introduction conduit, and extending at an outlet flange angle away from the outlet flange body inner portion and downstream of the mixer, the outlet flange angle being obtuse,

an outlet flange opening extending through the outlet flange body inner portion, and

a plurality of outlet flange perforations extending through the outlet flange body outer portion and arrayed circumferentially around a portion of the outlet flange opening.

2. The exhaust gas aftertreatment system of claim 1 , wherein:

the introduction conduit has a radius (r c );

the mixer body has a radius (r mb ); and

0

.

3

⁢

0

⁢

r

c

≤

r

mb

≤

0

.

9

⁢

0

⁢

r

c

.

3. The exhaust gas aftertreatment system of claim 2 , wherein:

the outlet flange body inner portion has a radius (r if ), and

0

.

0

⁢

9

⁢

r

c

≤

r

if

≤

0

.

8

⁢

5

⁢

5

⁢

r

c

.

4. The exhaust gas aftertreatment system of claim 3 , wherein: each of the plurality of outlet flange perforations has a center point that is separated from the outlet flange center axis by a radius (r perf ) that is a function of a value k;

the outlet flange body outer portion has a radius r of ;

0

.

0

⁢

5

≤

k

≤

0.95

;

and

r

perf

=

r

if

+

k

⁡

(

r

of

-

r

if

)

.

5. The exhaust gas aftertreatment system of claim 1 , wherein each of the plurality of outlet flange perforations has a diameter in a range of 2 millimeters to 30 millimeters, inclusive.

6. The exhaust gas aftertreatment system of claim 5 , wherein:

the outlet flange has an outlet flange transverse axis that intersects a center point of the outlet flange body outer portion, the outlet flange transverse axis extends along an outlet flange plane that bisects the outlet flange body outer portion, the outlet flange plane is orthogonal to and intersecting the conduit center axis, and is parallel to the injection axis;

a center point of each of the plurality of outlet flange perforations is separated from the outlet flange transverse axis by an outlet flange perforation angle;

the outlet flange perforation angle is defined by an angle between (1) the outlet flange transverse axis and (2) a line between the center point of each of the plurality of outlet flange perforations and a center of the outlet flange; and

each of the plurality of outlet flange perforations is located such that each of the outlet flange perforation angles is in a range of 5 degrees to 90 degrees, inclusive.

7. The exhaust gas aftertreatment system of claim 1 , wherein the outlet flange angle is in a range of 120 degrees to 171 degrees, inclusive.

8. The exhaust gas aftertreatment system of claim 1 , wherein: the mixer further comprises:

a treatment fluid inlet disposed along the injection axis and configured to receive the treatment fluid from the injector,

an upstream vane plate disposed upstream of the treatment fluid inlet and having a plurality of upstream vanes, at least one of the plurality of upstream vanes coupled to the mixer body, and

a downstream vane plate disposed downstream of the treatment fluid inlet and having a plurality of downstream vanes, at least one of the plurality of downstream vanes coupled to the mixer body.

9. The exhaust gas aftertreatment system of claim 1 , further comprising:

a perforated dividing plate coupled to the introduction conduit and comprising:

a perforated dividing plate body coupled to the introduction conduit, the perforated dividing plate centered on a perforated dividing plate transverse axis, and

a plurality of perforated dividing plate perforations extending through the perforated dividing plate body, disposed circumferentially along the perforated dividing plate body, and defined by a perforated area, the perforated area is defined by a shape and is centered on a perforated area transverse axis that is offset from the perforated dividing plate transverse axis.

10. The exhaust gas aftertreatment system of claim 9 , wherein the perforated dividing plate further comprises a perforated dividing plate panel disposed on the perforated dividing plate body and configured to seal at least one of the plurality of perforated dividing plate perforations.

11. The exhaust gas aftertreatment system of claim 1 , further comprising:

a partitioning plate coupled to the mixer body and comprising:

a partitioning plate body coupled to the mixer body, the partitioning plate body centered on a partitioning plate transverse axis, and

a partitioning plate opening extending through the partitioning plate body, the partitioning plate opening centered on a partitioning plate opening center axis that is offset from the partitioning plate transverse axis.

12. An exhaust gas aftertreatment system comprising:

an introduction conduit centered on a conduit center axis;

a dosing module coupled to the introduction conduit and comprising an injector that is configured to provide a treatment fluid into the introduction conduit and that is defined by an injection axis;

a mixer disposed within the introduction conduit and comprising a mixer body configured to receive exhaust gas and the treatment fluid; and

a perforated dividing plate coupled to the introduction conduit and comprising:

a perforated dividing plate body coupled to the introduction conduit, the perforated dividing plate centered on a perforated dividing plate transverse axis,

a plurality of perforated dividing plate perforations extending through the perforated dividing plate body, disposed circumferentially along the perforated dividing plate body, and defined by a perforated area, the perforated area is defined by a shape and is centered on a perforated area transverse axis that is offset from the perforated dividing plate transverse axis, and

a perforated dividing plate panel disposed on the perforated dividing plate body and configured to seal at least one of the plurality of perforated dividing plate perforations.

13. The exhaust gas aftertreatment system of claim 12 , wherein the perforated dividing plate panel is rectangular.

14. The exhaust gas aftertreatment system of claim 12 , wherein the perforated dividing plate panel is circular.

15. The exhaust gas aftertreatment system of claim 12 , wherein the perforated dividing plate panel is triangular.

16. An exhaust gas aftertreatment system comprising:

an introduction conduit centered on a conduit center axis;

a dosing module coupled to the introduction conduit and comprising an injector that is configured to provide a treatment fluid into the introduction conduit and that is defined by an injection axis;

a mixer disposed within the introduction conduit and comprising a mixer body configured to receive exhaust gas and the treatment fluid; and

a partitioning plate coupled to the mixer body and comprising:

a partitioning plate body coupled to the mixer body, the partitioning plate body centered on a partitioning plate transverse axis, and

a partitioning plate opening extending through the partitioning plate body, the partitioning plate opening centered on a partitioning plate opening center axis that is offset from the partitioning plate transverse axis;

an outlet flange comprising an outlet flange body centered on an outlet flange center axis, the outlet flange body comprising:

an outlet flange body inner portion coupled to the mixer body,

an outlet flange body outer portion coupled to the introduction conduit, separating the outlet flange body inner portion from the introduction conduit, and extending at an outlet flange angle away from the outlet flange body inner portion and downstream of the mixer, the outlet flange angle being obtuse,

an outlet flange opening extending through the outlet flange body inner portion, and

a plurality of outlet flange perforations extending through the outlet flange body outer portion and arrayed circumferentially around a portion of the outlet flange opening;

wherein the partitioning plate opening center axis is offset from the outlet flange center axis by a radial eccentric distance (e1) that is a function of an outlet flange body inner portion radius (r if ) and a partitioning plate opening radius (r partitioning );

0.05 (r if −r partitioning )≤e 1 ≤0.95(r if −r partitioning ).

Assignments (1)

Continuity (2)

References Cited (393)