CN-116498420-B - Reducing agent delivery system for exhaust aftertreatment system

Abstract

The application relates to a reductant delivery system for an exhaust aftertreatment system. A reductant delivery system includes an inlet body, an outlet body, and an outer transfer tube. The inlet body includes an inlet body coupler, an inlet body outer transfer housing, and an inlet body inner housing. The inlet body coupler surrounds an inlet body inlet configured to receive exhaust gas. The inlet body outer transfer shell is coupled to the inlet body coupler. The inlet body outer transfer housing includes an inlet body outer transfer housing inner surface and an inlet body outer transfer housing outlet. The inlet body outer transfer case outlet extends through the inlet body outer transfer case inner surface. The inlet body inner shell includes an inlet body inner shell first flange, an inlet body inner shell second flange, and an inlet body inner shell wall. The inlet body inner housing first flange is coupled to the inlet body outer transfer housing inner surface.

Inventors

• M. Mittapali
• Enoch Nandulu
• SAMUEL JOHNSON
• RYAN M. JOHNSON
• Kartiki Jagotap
• Venai Kumar Josh
• Aishwarya Pravin Josh

Assignees

• 康明斯排放处理公司

Dates

Publication Date

20260512

Application Date

20191203

Claims (20)

1. 1. A reductant delivery system, comprising: an inlet body, the inlet body comprising: An inlet body coupler surrounding an inlet body inlet configured to receive exhaust gas, -An inlet body outer transfer housing coupled to the inlet body coupler, the inlet body outer transfer housing comprising: -an inlet body outer transfer housing inner surface, and -An inlet body outer transfer housing outlet extending through the inlet body outer transfer housing inner surface; an inlet body outer mounting housing coupled to the inlet body coupler and the inlet body outer transfer housing, the inlet body outer mounting housing and the inlet body outer transfer housing defining an inlet body cavity, the inlet body outer mounting housing including an inlet body outer mounting housing inner surface, and -An inlet body inner housing contained within the inlet body cavity, the inlet body inner housing being separate from the inlet body outer mounting housing inner surface; An outlet body, the outlet body comprising: An outlet body coupler surrounding an outlet body outlet configured to provide exhaust gas, and -An outlet body housing coupled to the outlet body coupler, the outlet body housing comprising an outlet body housing inlet, and An outer transfer tube coupled to the inlet body outer transfer housing about the inlet body outer transfer housing outlet and coupled to the outlet body housing about the outlet body housing inlet.
2. 2. The reductant delivery system of claim 1, further comprising: An inner transfer tube positioned within and spaced apart from the outer transfer tube; Wherein the inlet body inner housing comprises an inlet body inner housing wall; wherein the inlet body inner shell includes an inlet body inner shell outlet extending through the inlet body inner shell wall, and Wherein the inner transfer tube is coupled to the inlet body inner housing wall around the inlet body inner housing outlet.
3. 3. The reductant delivery system of claim 1, wherein: The inlet body inner shell includes an inlet body inner shell wall, and The inlet body further includes a diverter plate at least partially contained within the inlet body inner housing wall.
4. 4. The reductant delivery system of claim 3, wherein: The diverter plate includes a diverter plate opening configured to receive exhaust gas from the inlet body inlet; The inlet body inner housing further includes an inlet body inner housing end cap surface abutting the inlet body inner housing wall and spaced apart from the inlet body outer mounting housing inner surface; the inlet body further includes a distributor tube comprising: -a distributor tube first end coupled to the distributor plate around the distributor plate opening, and -A distributor tube second end coupled to the inlet body inner shell end cap surface.
5. 5. The reductant delivery system of claim 4, wherein the distributor pipe further comprises more than one distributor pipe aperture, each of the distributor pipe apertures configured to facilitate exhaust gas flow from the distributor pipe out of the distributor pipe and to a region between the diverter plate, the distributor pipe, the inlet body inner shell wall, and the inlet body inner shell end cap surface.
6. 6. The reductant delivery system of any one of claims 1-5, wherein the inlet body housing further comprises: An inlet body outer mounting housing flow dividing surface contiguous with and extending from the inlet body outer mounting housing inner surface toward the inlet body inner housing, An inlet body outer mounting housing projecting surface contiguous with the inlet body outer mounting housing flow dividing surface and the inlet body outer mounting housing inner surface, and An injection hole extending through the inlet body outer mounting housing flow dividing surface.
7. 7. The reductant delivery system of claim 6, wherein: the inlet body further includes a shroud assembly comprising: a shroud flange coupled to the inlet body outer mounting shell protruding surface partially around the injection hole, and A shroud plate coupled to the shroud flange; a shield inlet is defined between the shield flange and the shield plate, and at least one of the inlet body outer mounting housing inner surface and the inlet body outer mounting housing protruding surface, and A shroud outlet is defined between the shroud flange and the shroud plate, the shroud outlet being located above the jet aperture.
8. 8. The reductant delivery system of claim 6, further comprising: A dosing module configured to receive a reductant, and A spray mount coupled to the dosing module; Wherein the inlet body outer mounting shell further comprises an inlet body outer mounting shell outer mounting surface opposite the inlet body outer mounting shell protruding surface; Wherein the injection hole is disposed in and extends through the inlet body outer mounting housing outer mounting surface, and Wherein the injection mount is coupled to the inlet body outer mounting housing outer mounting surface about the injection orifice.
9. 9. The reductant delivery system of claim 2, wherein: the inlet body inlet is disposed along an inlet body inlet plane; the inlet body, the outlet body and the outer transfer tube are bisected by a reductant delivery system body bisecting plane orthogonal to the inlet body inlet plane and intersecting an inlet body inlet center point defining the inlet body inlet; the inner transfer tube includes: -an inner transfer tube curved portion, and -An inner transfer tube straight portion adjoining the inner transfer tube curved portion; The straight line part of the inner conveying pipe is centered on the central axis of the inner conveying pipe, and The inner transfer tube central axis is angularly separated from the reductant delivery system body bisecting plane by less than 50 degrees as measured along a plane parallel to the inlet body inlet plane.
10. 10. The reductant delivery system of claim 9, wherein the inlet body is coupled to the outlet body only by the outer delivery tube.
11. 11. A reductant delivery system, comprising: an inlet body, the inlet body comprising: -an inlet body coupler surrounding an inlet body inlet configured to receive exhaust gas; -an inlet body outer transfer housing coupled to the inlet body coupler, the inlet body outer transfer housing comprising: -an inlet body outer transfer housing inner surface, and -An inlet body outer transfer housing outlet extending through the inlet body outer transfer housing inner surface; -an inlet body outer mounting housing coupled to the inlet body coupler and the inlet body outer transfer housing, the inlet body outer mounting housing and the inlet body outer transfer housing defining an inlet body cavity, the inlet body outer mounting housing comprising an inlet body outer mounting housing inner surface; -an inlet body inner housing contained within the inlet body cavity, the inlet body inner housing being separate from the inlet body outer mounting housing inner surface, the inlet body inner housing comprising: -an inlet body inner housing wall, and An inlet body inner housing end cap surface contiguous with said inlet body inner housing wall and spaced from said inlet body outer mounting housing inner surface, and -A distributor pipe, the distributor pipe comprising: -a first end of the distributor tube, -A distributor tube second end coupled to said inlet body inner shell end cap surface, and -More than one distributor pipe aperture, each of said distributor pipe apertures being configured to facilitate the flow of exhaust gas from said distributor pipe out of said distributor pipe and to a zone; an outlet body including an outlet body coupler surrounding an outlet body outlet configured to provide exhaust gas, and A diverter plate at least partially contained within the inlet body inner housing wall, the diverter plate including a diverter plate opening configured to receive exhaust gas from the inlet body inlet; wherein the distributor tube first end is coupled to the distributor plate about the distributor plate opening, and Wherein the region is between the diverter plate, the distributor tube, the inlet body inner housing wall, and the inlet body inner housing end cap surface.
12. 12. The reductant delivery system of claim 11, wherein the outlet body further comprises an outlet body housing coupled to the outlet body coupler, the outlet body housing comprising an outlet body housing inlet.
13. 13. The reductant delivery system of claim 12, further comprising: An inner transfer tube coupled to the inlet body outer transfer housing about the inlet body outer transfer housing outlet and coupled to the outlet body housing about the outlet body housing inlet; wherein the inlet body inner shell includes an inlet body inner shell outlet extending through the inlet body inner shell wall, and Wherein the inner transfer tube is coupled to the inlet body inner housing wall around the inlet body inner housing outlet.
14. 14. The reductant delivery system of claim 13, wherein the outlet body further comprises a deflector extending within the outlet body housing toward the inner delivery tube, the deflector coupled to at least one of the outlet body housing and the inner delivery tube.
15. 15. The reductant delivery system of any one of claims 11-14, wherein the inlet body outer mounting housing further comprises: An inlet body outer mounting housing flow dividing surface contiguous with and extending from the inlet body outer mounting housing inner surface toward the inlet body inner housing, An inlet body outer mounting housing projecting surface contiguous with the inlet body outer mounting housing flow dividing surface and the inlet body outer mounting housing inner surface, and An injection hole extending through the inlet body outer mounting housing flow dividing surface.
16. 16. The reductant delivery system of claim 15, wherein: the inlet body further includes a shroud assembly comprising: -a shroud flange coupled to the inlet body outer mounting shell protruding surface partially surrounding the injection hole, and -A shroud plate coupled to the shroud flange; a shield inlet is defined between the shield flange and the shield plate, and at least one of the inlet body outer mounting housing inner surface and the inlet body outer mounting housing protruding surface, and A shroud outlet is defined between the shroud flange and the shroud plate, the shroud outlet being located above the jet aperture.
17. 17. The reductant delivery system of claim 15, further comprising: A dosing module configured to receive a reductant, and A spray mount coupled to the dosing module; Wherein the inlet body outer mounting shell further comprises an inlet body outer mounting shell outer mounting surface opposite the inlet body outer mounting shell protruding surface; Wherein the injection hole is disposed in and extends through the inlet body outer mounting housing outer mounting surface, and Wherein the injection mount is coupled to the inlet body outer mounting housing outer mounting surface about the injection orifice.
18. 18. The reductant delivery system of claim 13, wherein: the inlet body inlet is disposed along an inlet body inlet plane; The inlet body, the outlet body and the outer transfer tube are bisected by a reductant delivery system body bisecting plane orthogonal to the inlet body inlet plane and intersecting an inlet body inlet center point defining the inlet body inlet; the inner transfer tube includes: -an inner transfer tube curved portion, and -An inner transfer tube straight portion adjoining the inner transfer tube curved portion; The straight line part of the inner conveying pipe is centered on the central axis of the inner conveying pipe, and The inner transfer tube central axis is angularly separated from the reductant delivery system body bisecting plane by less than 50 degrees as measured along a plane parallel to the inlet body inlet plane.
19. 19. The reductant delivery system of claim 18, wherein the inlet body is coupled to the outlet body only by the outer delivery tube.
20. 20. The reductant delivery system of any one of claims 11-14, 16-19, wherein the inlet body inner shell further comprises more than one inlet body inner shell aperture disposed on the inlet body inner shell end cap surface around the distributor tube, each inlet body inner shell aperture configured to facilitate passage of exhaust gas from at least one of: passing between the inlet body inner shell and the inlet body outer mounting shell into the inlet body inner shell, and Passes between the inlet body inner housing and the inlet body outer transfer housing, into the inlet body inner housing.

Description

Reducing agent delivery system for exhaust aftertreatment system The application is a divisional application of application number 201980103533.3, entitled "reductant delivery System for exhaust gas aftertreatment System", having application date 2019, 12, 03. Technical Field The present disclosure relates generally to a reductant delivery system for an exhaust aftertreatment system of an internal combustion engine. Background For internal combustion engines, such as diesel engines, nitrogen oxide (NO X) compounds may be emitted in the exhaust. For example, it may be desirable to reduce NO X emissions to comply with environmental regulations. To reduce NO X emissions, the reductant may be dosed into the exhaust gas by a dosing system and within the exhaust aftertreatment system. The reductant facilitates converting a portion of the exhaust gas to non-NO X emissions, such as nitrogen (N 2), carbon dioxide (CO 2), and water (H 2 O), thereby reducing NO X emissions. Disclosure of Invention In one embodiment, a reductant delivery system includes an inlet body, an outlet body, and an outer delivery tube. The inlet body includes an inlet body coupler, an inlet body outer transfer housing, and an inlet body inner housing. The inlet body coupler surrounds an inlet body inlet configured to receive exhaust gas. The inlet body outer transfer shell is coupled to the inlet body coupler. The inlet body outer transfer housing includes an inlet body outer transfer housing inner surface and an inlet body outer transfer housing outlet. The inlet body outer transfer case outlet extends through the inlet body outer transfer case inner surface. The inlet body inner shell includes an inlet body inner shell first flange, an inlet body inner shell second flange, and an inlet body inner shell wall. The inlet body inner housing first flange is coupled to the inlet body outer transfer housing inner surface. The inlet body inner housing second flange is coupled to the inlet body outer transfer housing inner surface. The inlet body inner shell wall abuts the inlet body inner shell first flange and the inlet body inner shell second flange and is spaced from the inlet body inner shell outer transfer shell inner surface. The outlet body includes an outlet body coupler and an outlet body housing. The outlet body coupler surrounds an outlet body outlet configured to provide exhaust gas. The outlet body housing is coupled to the outlet body coupler. The outlet body housing includes an outlet body housing inlet. The outer transfer tube is coupled to the inlet body outer transfer housing about the inlet body outer transfer housing outlet and coupled to the outlet body housing about the outlet body housing inlet. In some embodiments, the reductant delivery system further includes an inner delivery tube positioned within and spaced apart from the outer delivery tube, wherein the inlet body inner shell includes an inlet body inner shell outlet extending through the inlet body inner shell wall, and wherein the inner delivery tube is coupled to the inlet body inner shell wall around the inlet body inner shell outlet. In some embodiments, the reductant delivery system further includes a diverter plate including a diverter plate coupling surface coupled to the inlet body inner housing wall, and a diverter plate panel adjacent to the diverter plate coupling surface. In some embodiments, the reductant delivery system further includes a diverter including a diverter base coupled to the diverter plate panel and the inlet body inner shell wall, a diverter end adjacent to the diverter base and coupled to the diverter plate panel, and more than one diverter end aperture disposed in the diverter end, wherein the inlet body inner shell further includes an inlet body inner shell end cap adjacent to the inlet body inner shell wall, wherein the diverter base is coupled to the inlet body inner shell end cap, and wherein the diverter end is coupled to the inlet body inner shell end cap. In some embodiments, the reductant delivery system further includes an inlet body outer mounting housing coupled to the inlet body coupler and the inlet body outer transfer housing, the inlet body outer mounting housing including an inlet body outer mounting housing inner surface, an inlet body outer mounting housing diverter surface contiguous with and extending from the inlet body outer mounting housing inner surface toward the inlet body inner housing, an inlet body outer mounting housing protrusion surface contiguous with and extending through the inlet body outer mounting housing protrusion surface, and an injection orifice disposed in and extending through the inlet body outer mounting housing. In some embodiments, the reductant delivery system further includes a shroud assembly including a shroud flange coupled to the inlet body outer mounting housing protruding surface partially around the injection hole, and a shroud plate coupled to the shroud flange, wherein a shroud inl