US-12618355-B2 - Exhaust conduit assembly

US12618355B2US 12618355 B2US12618355 B2US 12618355B2US-12618355-B2

Abstract

An exhaust conduit assembly includes: an exhaust conduit body defining an exhaust flow path; an injection aperture extending through the exhaust conduit body; and a doser mount portion including: an inlet port configured to receive a coolant, a channel configured to receive the coolant from the inlet port, at least a portion of the channel extending around at least a portion of the injection aperture, the channel including a first section and a second section, and an outlet port configured to receive the coolant from the channel. The doser mount portion defines a cavity configured to receive at least a portion of a dosing module and a ridge defines a base of the cavity, wherein the first portion of the channel is disposed adjacent to the cavity and the second portion of the channel is disposed adjacent to the ridge.

Inventors

Omkar Tendolkar
Samuel Johnson
Thomas Kreser
MASOUD ZIABAKHSH DEILAMI
Ralf Rohrmueller
Atif Mahmood
Joe V. Hill
Nicholas K. Sharp
John G. Buechler
Jim L. Alonzo

Assignees

CUMMINS EMISSION SOLUTIONS INC.

Dates

Publication Date: 20260505
Application Date: 20241216

Claims (19)

1 . An exhaust conduit assembly comprising: an exhaust conduit body defining an exhaust flow path; an injection aperture extending through the exhaust conduit body; and a doser mount portion comprising: an inlet port configured to receive a coolant, a channel configured to receive the coolant from the inlet port, at least a portion of the channel extending around at least a portion of the injection aperture, the channel comprising a first portion and a second portion, and an outlet port configured to receive the coolant from the channel; wherein the doser mount portion defines a cavity configured to receive at least a portion of a dosing module and a ridge defines a base of the cavity; and wherein the first portion of the channel is disposed adjacent to the cavity and the second portion of the channel is disposed adjacent to the ridge.
2 . The exhaust conduit assembly of claim 1 , wherein the doser mount portion is integrally formed with the exhaust conduit body.
3 . The exhaust conduit assembly of claim 1 , wherein at least the portion of the channel extends around an entirety of the injection aperture.
4 . The exhaust conduit assembly of claim 1 , wherein the inlet port and the outlet port are both disposed on a top face of the doser mount portion or both extend from a side of the doser mount portion.
5 . The exhaust conduit assembly of claim 1 , further comprising: a support wall that at least partially defines an air gap, the support wall separating the channel from the air gap.
6 . The exhaust conduit assembly of claim 5 , wherein the air gap is defined by an inner wall and an outer wall, the inner wall being the exhaust conduit body, and the outer wall separated from inner wall by the support wall.
7 . The exhaust conduit assembly of claim 6 , wherein the outer wall extends around a portion of the inner wall.
8 . The exhaust conduit assembly of claim 1 , further comprising: a first support wall at least partially defining a first air gap, the first support wall separating the first air gap from a first portion of the channel; and a second support wall at least partially defining a second air gap, the second support wall separating the second air gap from a second portion of the channel; wherein: the exhaust conduit body comprises an inlet and an outlet; the first air gap is disposed between the first portion and the inlet of the exhaust conduit body; and the second air gap is disposed between the second portion and the outlet of the exhaust conduit body.
9 . An exhaust aftertreatment system comprising: a doser comprising an injector; and the exhaust conduit assembly of claim 1 ; wherein the doser is coupled to the doser mount portion such that the injector is configured to provide reductant through the injection aperture and into the exhaust conduit body.
10 . The exhaust aftertreatment system of claim 9 , wherein: the doser mount portion defines a cavity extending around the injection aperture; and a portion of the doser is received within the cavity.
11 . An exhaust aftertreatment system comprising: a doser comprising an injector; an exhaust conduit assembly comprising: an exhaust conduit body defining an exhaust flow path; an injection aperture extending through the exhaust conduit body; and a doser mount portion comprising: an inlet port configured to receive a coolant, a channel configured to receive the coolant from the inlet port, at least a portion of the channel extending around at least a portion of the injection aperture, and an outlet port configured to receive the coolant from the channel; and a turbocharger configured to receive the coolant and an exhaust; wherein the turbocharger and the exhaust conduit assembly are configured such that the exhaust conduit assembly receives the exhaust from the turbocharger and the inlet port receives the coolant from the turbocharger; and wherein the doser is coupled to the doser mount portion such that the injector is configured to provide reductant through the injection aperture and into the exhaust conduit body.
12 . The exhaust aftertreatment system of claim 11 , wherein the turbocharger includes a housing that is integrally formed with the exhaust conduit assembly.
13 . An exhaust aftertreatment system comprising: a doser comprising an injector; an exhaust conduit assembly comprising: an exhaust conduit body defining an exhaust flow path; an injection aperture extending through the exhaust conduit body; a doser mount portion comprising: an inlet port configured to receive a coolant, a channel configured to receive the coolant from the inlet port, at least a portion of the channel extending around at least a portion of the injection aperture, and an outlet port configured to receive the coolant from the channel; an inner wall; a support wall coupled to the inner wall and extending radially away from the inner wall; and an outer wall coupled to the support wall, the outer wall separated from the inner wall by the support wall such that an air gap extends between the outer wall and the inner wall; and a coolant pump configured to receive the coolant; wherein the coolant pump and the exhaust conduit assembly are configured such that the coolant pump receives the coolant from the outlet port; and wherein the doser is coupled to the doser mount portion such that the injector is configured to provide reductant through the injection aperture and into the exhaust conduit body.
14 . The exhaust aftertreatment system of claim 9 , wherein: the exhaust conduit assembly comprises: an inner wall, a support wall coupled to the inner wall and extending radially away from the inner wall, and an outer wall coupled to the support wall, the outer wall separated from the inner wall by the support wall such that an air gap extends between the outer wall and the inner wall.
15 . The exhaust aftertreatment system of claim 14 , wherein the support wall separates the air gap from the channel.
16 . The exhaust aftertreatment system of claim 9 , further comprising: a turbocharger configured to receive exhaust; and a coolant source configured to store the coolant; wherein the exhaust conduit assembly receives the exhaust from the turbocharger; and wherein the exhaust conduit assembly receives the coolant from the coolant source.
17 . An exhaust conduit assembly comprising: an exhaust conduit body defining an exhaust flow path, the exhaust conduit body comprising an inlet and an outlet; a support wall extending radially away from the exhaust conduit body; an outer wall extending around a portion of the exhaust conduit body, the outer wall separated from the exhaust conduit body by the support wall; an injection aperture extending through the exhaust conduit body; and a doser mount portion defining a cavity that extends around the injection aperture, the cavity to receive a portion of a doser; wherein the exhaust conduit body, the support wall, and the outer wall define at least one air gap, the at least one air gap disposed between the doser mount portion and at least one of the inlet or the outlet of the exhaust conduit body.
18 . The exhaust conduit assembly of claim 17 , further comprising: an inlet port configured to receive a coolant; a channel configured to receive the coolant from the inlet port, at least a portion of the channel extending around at least a portion of the injection aperture; and an outlet port configured to receive the coolant from the channel.
19 . The exhaust conduit assembly of claim 18 , wherein the support wall separates the at least one air gap from the channel.

Description

CROSS-REFERENCE TO RELATED APPLICATION This is a bypass continuation of PCT Application No. PCT/US2023/025152, filed Jun. 13, 2023, which claims the benefit of and priority to U.S. Provisional Application No. 63/353,247, filed Jun. 17, 2022. The contents of these applications are incorporated herein by reference in their entirety. TECHNICAL FIELD The present disclosure relates generally to doser mounts for exhaust aftertreatment systems of an internal combustion engine. BACKGROUND For an internal combustion engine system, it may be desirable to reduce emissions of certain components in exhaust produced by a combustion of fuel. One approach that can be implemented to reduce emissions is to treat the exhaust using an aftertreatment system. It is often desirable to mix exhaust with a reductant used to treat the exhaust. However, heat from the exhaust system may be transferred to the reductant dosing module, which may damage the dosing module. SUMMARY In one embodiment, an exhaust conduit assembly includes an exhaust conduit body, an injection aperture, and a doser mount portion. The exhaust conduit defines an exhaust flow path. The injection aperture extends through the exhaust conduit body. The doser mount portion includes an inlet port, a channel, and an outlet port. The inlet port is configured to receive a coolant. The channel is configured to receive the coolant from the inlet port. At least a portion of the channel extends around at least a portion of the injection aperture. The outlet port is configured to receive the coolant from the channel. In another embodiment, an exhaust aftertreatment system includes an exhaust conduit body defining an exhaust flow path, the exhaust conduit body comprising an inlet and an outlet. The exhaust aftertreatment system includes a support wall extending radially away from the exhaust conduit body. The exhaust aftertreatment system includes an outer wall extending around a portion of the exhaust conduit body. The outer wall is separated from the exhaust conduit body by the support wall. The exhaust aftertreatment system includes an injection aperture extending through the exhaust conduit body. The exhaust aftertreatment system includes a doser mount portion defining a cavity that extends around the injection aperture. The cavity receives a portion of a doser. The exhaust conduit body, the support wall, and the outer wall define at least one air gap. The at least one air gap is disposed between the doser mount portion and at least one of the inlet or the outlet of the exhaust conduit body. BRIEF DESCRIPTION OF THE DRAWINGS The disclosure will become more fully understood from the following detailed description, taken in conjunction with the accompanying Figures, wherein like reference numerals refer to like elements unless otherwise indicated, in which: FIG. 1 is a schematic diagram of an example exhaust aftertreatment system including an exhaust conduit assembly; FIG. 2 is a schematic diagram of another example exhaust aftertreatment system including an exhaust conduit assembly; FIG. 3 is a perspective view of an example exhaust conduit assembly for an exhaust aftertreatment system; FIG. 4 is a cross-sectional view of the exhaust conduit assembly shown in FIG. 3 taken along plane A-A in FIG. 3; FIG. 5 is a detailed view of DETAIL A shown in FIG. 4; FIG. 6 is a perspective cross-sectional view of the exhaust conduit assembly shown in FIG. 3 taken along plane A-A in FIG. 3; FIG. 7 is a perspective view of another example exhaust conduit assembly for an exhaust aftertreatment system; FIG. 8 is a perspective view of a portion of the exhaust conduit assembly shown in FIG. 7; and FIG. 9 is a top view of the portion of the exhaust conduit assembly shown in FIG. 8. It will be recognized that the Figures are schematic representations for purposes of illustration. The Figures are provided for the purpose of illustrating one or more implementations with the explicit understanding that the Figures will not be used to limit the scope or the meaning of the claims. DETAILED DESCRIPTION Following below are more detailed descriptions of various concepts related to, and implementations of, methods, apparatuses, and for providing an exhaust conduit assembly for an exhaust aftertreatment system of an internal combustion engine. The various concepts introduced above and discussed in greater detail below may be implemented in any of a number of ways, as the described concepts are not limited to any particular manner of implementation. Examples of specific implementations and applications are provided primarily for illustrative purposes. I. Overview In order to reduce emissions and optimize performance of an internal combustion engine, it may be desirable to decrease a temperature of a dosing module (e.g., a doser) of an exhaust aftertreatment system. For example, it may be desirable to reduce heat transferred from an internal combustion engine system, for example, via a turbocharger, an exhau