US 12,503,969 B2Granted

Reductant delivery system for exhaust gas aftertreatment system

AssigneeCummins Emission Solutions Inc.

InventorsMahendra Mittapalli, Enoch Nanduru, Samuel Johnson, Ryan M. Johnson, Kartiki Jagtap, Vinay Kumar Joshi, Aishwarya Pravin Joshi

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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.

Claims19

Dependent claims

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.

13 more elements

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.

18 more elements

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 and that is defined by an inlet body inlet center point,
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;
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 inlet center point,
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;
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;
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;
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 or in contact with the inlet body outer mounting shell inner surface,
an inlet body inner shell second flange coupled to or in contact with 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;
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.

19 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/782,085Filed 3 Dec 2019
Published: US 2023/0003159 A15 Jan 2023
Granted: 23 Dec 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F01N 3/2892
Construction of catalytic reactors: exhaust flow directors or the like, e.g. upstream of catalytic device
F01N 3/021
For cooling, or for removing solid constituents of, exhaust: by means of filters
F01N 3/2066
Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing…:…
F01N 3/2073
Selective catalytic reduction [SCR]: means for generating a reducing substance from the exhaust gases