Recessed exhaust reductant injector with cover plate

Patent metadata

Field	Value
Publication number	US-2016273431-A1
Application number	US-201514811556-A
Country	US
Kind code	A1
Filing date	Jul 28, 2015
Priority date	Mar 17, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

An aftertreatment system comprises a housing defining an internal volume. The housing includes an inlet, an outlet and a first sidewall. A sleeve is positioned within the internal volume and protrudes through the first sidewall. An inner shell is positioned within an inner region defined by the sleeve and defines a recess therein. The inner shell spaced apart from the sleeve so as to define a channel therebetween. A base is positioned within the recess and includes an injection port which is in communication with the internal volume. An injector is disposed on the base and is disposed completely within the recess. The injector is in fluidic communication with the internal volume via the injection port. The injector is configured to inject an exhaust reductant into the internal volume via the opening. A cover plate can be disposed over the recess and structured to prevent objects from impacting the injector.

First claim

What is claimed is:

1 . An aftertreatment system, comprising:
a housing defining an inlet, and outlet and an internal volume, the housing including:
a first sidewall,
a sleeve positioned within the internal volume and protruding through the first sidewall,
an inner shell positioned within an inner region defined by the sleeve, the inner shell defining a recess therein, the inner shell spaced apart from the sleeve so as to define a channel therebetween, and
a base positioned within the recess, the base including an injection port, the injection port in fluidic communication with the internal volume;
an injector disposed on the base, the injector disposed completely within the recess, the injector in fluidic communication with the internal volume via the injection port, the injector configured to inject an exhaust reductant into the internal volume via the injection port; and a selective catalytic reductant system disposed in the internal volume and structured to receive a mixture of an exhaust gas and the exhaust reductant, the selective catalytic reduction system including at least one catalyst formulated to treat the exhaust gas.

2 . The aftertreatment system of claim 1 , wherein an insulating material is positioned in the channel.

3 . The aftertreatment system of claim 1 , wherein a cover plate is disposed over the recess, the cover plate structured to prevent objects from impacting the injector.

4 . The aftertreatment system of claim 3 , wherein a plurality of openings are defined in the cover plate.

5 . The aftertreatment system of claim 1 , wherein the recess has a circular cross-section.

6 . The aftertreatment system of claim 1 , wherein the injector includes a base plate, the base plate removably coupled to the base of the recess via at least one fastener.

7 . The aftertreatment system of claim 6 , wherein a handle is disposed on the base plate, the handle structured to be engaged by a user to either selectively dispose the injector in the recess or selectively remove the injector from the recess.

8 . The aftertreatment system of claim 1 , wherein the inlet includes an inlet conduit and the outlet includes an outlet conduit, each of the inlet conduit and the outlet conduit rotatable relative to a longitudinal axis of the housing between a first position, in which the inlet conduit and the outlet conduit are oriented parallel to the longitudinal axis, and a second position, in which the inlet conduit and outlet conduit are oriented orthogonal to the longitudinal axis.

9 . The aftertreatment system of claim 1 , wherein the housing further comprises:
a second sidewall positioned orthogonal to the first sidewall, and a third sidewall positioned orthogonal to the first sidewall and opposite the second sidewall, wherein at least one of the second sidewall and the third sidewall define a plurality of mounting holes, each of the plurality of mounting holes configured to receive a fastener for mounting the housing on a structure.

10 . A housing for an aftertreatment system, comprising:
an inlet; an outlet; a first sidewall defining a recess therein; and a base positioned within the recess, the base including an injection port, the injection port in fluidic communication with an internal volume defined by the housing, wherein the recess is structured to receive an injector such that the injector is disposed completely within the recess and is in fluidic communication with the internal volume via the injection port, the injector configured to inject an exhaust reductant into the internal volume via the injection port, wherein at least a portion of the first sidewall of the housing is contoured to define a dome shape.

11 . The housing of claim 10 , wherein the housing further comprises a second sidewall of the housing opposite the first sidewall,
wherein the second sidewall is also contoured so as to define the dome shape.

12 . The housing of claim 11 , wherein a plurality of ribs are defined on at least one of the first sidewall and the second sidewall.

13 . The housing of claim 10 , wherein the recess is defined proximal to the inlet.

14 . The housing of claim 10 , further comprising:
a cover plate disposed over the recess, the cover plate structured to prevent objects from impacting the injector.

15 . The housing of claim 14 , wherein a plurality of openings are defined in the cover plate.

16 . The housing of claim 10 , wherein the injector includes a base plate, the base plate removably coupled to the base of the recess via at least one fastener.

17 . The housing of claim 16 , wherein a handle is disposed on the base plate, the handle structured to be engaged by a user to selectively dispose the injector in the recess and selectively remove the injector from the recess.

18 . The housing of claim 10 , further comprising:
a sleeve positioned within the internal volume and protruding through the first sidewall; and an inner shell positioned within an inner region defined by the sleeve, the inner shell defining the recess therein, the inner shell spaced apart from the sleeve so as to define a channel therebetween.

19 . The aftertreatment system of claim 1 , wherein the inlet includes an inlet conduit and the outlet includes an outlet conduit, each of the inlet conduit and the outlet conduit configured to rotate relative to a longitudinal axis of the housing between a first position, in which the inlet conduit and outlet conduit are oriented parallel to the longitudinal axis, and a second position, in which the inlet conduit and the outlet conduit are oriented perpendicular to the longitudinal axis.

20 . An apparatus for treating an exhaust gas, comprising:
a housing defining an internal volume and including:
an inlet conduit,
an outlet conduit,
a first sidewall defining a recess therein, and
a base positioned within the recess, the base including an injection port, the injection port in fluidic communication with the internal volume;
an injector disposed on the base of the recess, the injector disposed completely within the recess, the injector in fluidic communication with the internal volume via the injection port, the injector configured to inject an exhaust reductant into the internal volume via the injection port; and a cover plate disposed over the recess, the cover plate structured to prevent objects from impacting the injector, wherein each of the inlet conduit and the outlet conduit are rotatable relative to a longitudinal axis of the housing between a first position, in which the inlet conduit and the outlet conduit are oriented parallel to the longitudinal axis, and a second position, in which the inlet conduit and the outlet conduit are oriented perpendicular to the longitudinal axis.

21 . The apparatus of claim 20 , wherein the injector includes a base plate, the base plate removably coupled to the base of the recess via at least one fastener.

22 . The apparatus of claim 21 , wherein a handle is disposed on the base plate, the handle structured to be engaged by a user to selectively dispose the injector in the recess and selectively remove the injector from the recess.

23 . The apparatus of claim 20 , wherein the housing further comprises:
a sleeve positioned within the internal volume and protruding through the first sidewall; and an inner shell positioned within an inner region defined by the sleeve, the inner shell defining the recess therein, the inner shell s

Assignees

• Cummins Emission Solutions Inc

Inventors

• Meier Jason
• lyer Vipin
• Severance Stephanie F
• Loraas Gordon

Classifications

• F01N3/2066 Primary

  Selective catalytic reduction [SCR] · CPC title

• F01N2610/1453

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

• B01D2258/01

  Engine exhaust gases · CPC title

• B01D53/94

  by catalytic processes · CPC title

• F01N3/2803

  characterised by structure, by material or by manufacturing of catalyst support · CPC title