Reductant delivery system for exhaust gas aftertreatment system

Patent metadata

Field	Value
Publication number	US-12503969-B2
Application number	US-201917782085-A
Country	US
Kind code	B2
Filing date	Dec 3, 2019
Priority date	Dec 3, 2019
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

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 shell, and an inlet body inner shell. The inlet body coupler surrounds an inlet body inlet that is configured to receive exhaust gas. The inlet body outer transfer shell is coupled to the inlet body coupler. The inlet body outer transfer shell includes an inlet body outer transfer shell inner surface and an inlet body outer transfer shell outlet. The inlet body outer transfer shell outlet extends through the inlet body outer transfer shell 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 shell first flange is coupled to the inlet body outer transfer shell inner surface.

First claim

What is claimed is:

1 . A reductant delivery system comprising:
an inlet body comprising:
an inlet body coupler surrounding an inlet body inlet that is configured to receive exhaust gas;
an inlet body outer transfer shell coupled to the inlet body coupler, the inlet body outer transfer shell comprising:
an inlet body outer transfer shell inner surface, and
an inlet body outer transfer shell outlet extending through the inlet body outer transfer shell inner surface;

an inlet body outer mounting shell coupled to the inlet body coupler and the inlet body outer transfer shell, the inlet body outer mounting shell and the inlet body outer transfer shell defining an inlet body cavity, the inlet body outer mounting shell comprising an inlet body outer mounting shell inner surface; and
an inlet body inner shell, an entirety of which is contained within the inlet body cavity, the inlet body inner shell comprising:
an inlet body inner shell first flange coupled to the inlet body outer mounting shell inner surface,
an inlet body inner shell second flange coupled to the inlet body outer mounting shell inner surface, and
an inlet body inner shell wall contiguous with the inlet body inner shell first flange and the inlet body inner shell second flange, and separated from the inlet body outer transfer shell inner surface;

an outlet body comprising:
an outlet body coupler surrounding an outlet body outlet that is configured to provide the exhaust gas, and
an outlet body shell coupled to the outlet body coupler, the outlet body shell comprising an outlet body shell inlet; and
an outer transfer tube coupled to the inlet body outer transfer shell around the inlet body outer transfer shell outlet and coupled to the outlet body shell around the outlet body shell inlet.

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 shell comprises 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 shell wall around the inlet body inner shell outlet.

3 . The reductant delivery system of claim 1 , further comprising:
a dividing plate comprising: a dividing plate coupling surface coupled to the inlet body inner shell wall; and a dividing plate panel contiguous with the dividing plate coupling surface.

4 . The reductant delivery system of claim 3 , further comprising:
a diverter comprising:
a diverter base coupled to the dividing plate panel and the inlet body inner shell wall,
a diverter end contiguous with the diverter base and coupled to the dividing plate panel, and
a plurality of diverter end apertures disposed in the diverter end;
wherein the inlet body inner shell further comprises an inlet body inner shell endcap that is contiguous with the inlet body inner shell wall; wherein the diverter base is coupled to the inlet body inner shell endcap; and wherein the diverter end is coupled to the inlet body inner shell endcap.

5 . The reductant delivery system of claim 1 , wherein the inlet body outer mounting shell further comprises:
an inlet body outer mounting shell dividing surface contiguous with the inlet body outer mounting shell inner surface and extending from the inlet body outer mounting shell inner surface towards the inlet body inner shell, an inlet body outer mounting shell projecting surface contiguous with the inlet body outer mounting shell dividing surface and the inlet body outer mounting shell inner surface, and an injection aperture disposed in the inlet body outer mounting shell projecting surface and extending through the inlet body outer mounting shell.

6 . The reductant delivery system of claim 5 , further comprising:
a shroud assembly comprising:
a shroud flange coupled to the inlet body outer mounting shell projecting surface partially around the injection aperture, and
a shroud plate coupled to the shroud flange;
wherein a shroud inlet is defined between the shroud flange, the shroud plate, and at least one of the inlet body outer mounting shell inner surface or the inlet body outer mounting shell projecting surface; and wherein a shroud outlet is defined between the shroud flange and the shroud plate, the shroud outlet located over the injection aperture.

7 . The reductant delivery system of claim 5 , further comprising:
a dosing module configured to receive reductant; and an injection 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 projecting surface; wherein the injection aperture is disposed in the inlet body outer mounting shell outer mounting surface and extends through the inlet body outer mounting shell outer mounting surface; and wherein the injection mount is coupled to the inlet body outer mounting shell outer mounting surface around the injection aperture.

8 . A reductant delivery system comprising:
an inlet body comprising:
an inlet body coupler surrounding an inlet body inlet that is configured to receive exhaust gas,
an inlet body outer transfer shell coupled to the inlet body coupler, the inlet body outer transfer shell comprising:
an inlet body outer transfer shell inner surface, and
an inlet body outer transfer shell outlet extending through the inlet body outer transfer shell inner surface,

an inlet body inner shell comprising:
an inlet body inner shell first flange,
an inlet body inner shell second flange, and
an inlet body inner shell wall contiguous with the inlet body inner shell first flange and the inlet body inner shell second flange, and separated from the inlet body outer transfer shell inner surface, and

an inlet body outer mounting shell coupled to the inlet body coupler and the inlet body outer transfer shell, the inlet body outer mounting shell and the inlet body outer transfer shell defining an inlet body cavity, the inlet body outer mounting shell comprising:
an inlet body outer mounting shell inner surface,
an inlet body outer mounting shell dividing surface contiguous with the inlet body outer mounting shell inner surface and extending from the inlet body outer mounting shell inner surface towards the inlet body inner shell,
an inlet body outer mounting shell projecting surface contiguous with the inlet body outer mounting shell dividing surface and the inlet body outer mounting shell inner surface,
an inlet body outer mounting shell outer mounting surface opposite the inlet body outer mounting shell projecting surface, and
an injection aperture disposed in the inlet body outer mounting shell projecting surface and the inlet body outer mounting shell outer mounting surface and extending through the inlet body outer mounting shell and the inlet body outer mounting shell outer mounting surface; and

an injection mount coupled to the inlet body outer mounting shell outer mounting surface around the injection aperture and configured to be coupled to a dosing module; wherein an entirety of the inlet body inner shell is contained within the inlet body cavity; wherein the inlet body inner shell first flange is coupled to or in contact with the inlet body outer mounting shell inner surface; and wherein the inlet body inner shell second flange is coupled to or in contact with the inlet body outer mounting shell inner surface.

9 . The reductant delivery system of claim 8 , further comprising a dividing plate comprising:
a dividing plate coupling surface coupled to the inlet body inner shell wall, and a dividing plate panel

Assignees

• Cummins Emission Solutions Inc

Inventors

• Mittapalli Mahendra
• Nanduru Enoch
• Johnson Samuel
• Johnson Ryan M
• Jagtap Kartiki
• Joshi Vinay Kumar
• Joshi Aishwarya Pravin

Classifications

• F01N2240/20

  a flow director or deflector · CPC title

• F01N3/2073

  Means for generating a reducing substance from the exhaust gases · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01N3/2892 Primary

  Exhaust flow directors or the like, e.g. upstream of catalytic device · CPC title

• F01N2610/1453

  Sprayers or atomisers; Arrangement thereof in the exhaust apparatus · CPC title