Reductant injector mount

Patent metadata

Field	Value
Publication number	US-2016245142-A1
Application number	US-201514628836-A
Country	US
Kind code	A1
Filing date	Feb 23, 2015
Priority date	Feb 23, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

A reductant injector mount is provided. The reductant injector mount includes a mounting region configured to connect to an exhaust conduit. The reductant injector also includes a contoured region formed in the mounting region. The contoured region is configured to increase a velocity of an exhaust gas flow through the contoured region. The contoured region is also configured to reduce a recirculation of the exhaust gas flow through the contoured region. Further, the reductant injector mount includes a cut out portion provided on the contoured region. The cut out portion is configured to receive a reductant injector tip therethrough.

First claim

What is claimed is:

1 . A reductant injector mount comprising:
a mounting region configured to connect to an exhaust conduit; a contoured region formed in the mounting region, the contoured region configured to:
increase a velocity of an exhaust gas flow through the contoured region; and
reduce a recirculation of the exhaust gas flow through the contoured region; and
a cut out portion provided on the contoured region, the cut out portion configured to receive a reductant injector tip therethrough.

2 . The reductant injector mount of claim 1 , wherein the contoured region includes a first lobe and a second lobe provided on either side of the cut out portion, wherein the first lobe is positioned at a location upstream of the cut out portion and the second lobe is positioned downstream of the cut out portion, with respect to an exhaust gas flow direction.

3 . The reductant injector mount of claim 2 , wherein the cut out portion is positioned in a throat portion of the contoured region, the throat portion connecting the first and second lobes of the contoured region.

4 . The reductant injector mount of claim 2 , wherein a ratio of a width of the first lobe with respect to a diameter of the cut out portion is from 0.75 to 5, wherein the width of the first lobe is measured along an axis of the reductant injector mount perpendicular to the exhaust gas flow direction.

5 . The reductant injector mount of claim 2 , wherein a ratio of a width of the second lobe with respect to a diameter of the cut out portion is from 0.75 to 5, wherein the width of the first lobe is measured along an axis of the reductant injector mount perpendicular to the exhaust gas flow direction.

6 . The reductant injector mount of claim 2 , wherein a ratio of a thickness of the reductant injector mount at a downstream end of the first lobe with respect to a thickness of the reductant injector mount at a downstream end of the second lobe is from 0.4 to 0.9, with respect to the exhaust gas flow direction.

7 . The reductant injector mount of claim 2 , wherein an angle of incidence of the contoured region at the first lobe is from 3° to 45°, wherein the angle of incidence is defined by the angle formed by the upstream end of the first lobe with respect to the mounting region of the reductant injector mount.

8 . The reductant injector mount of claim 1 further comprising receiving elements projecting from the mounting region, the receiving elements configured to connect to a reductant injector.

9 . The reductant injector mount of claim 1 , wherein the contoured region has an oblong shape.

10 . The reductant injector mount of claim 1 , wherein a circumference of the cut out portion tapers along a thickness of the reductant injector mount.

11 . The reductant injector mount of claim 1 , wherein an orientation of the contoured region provided on the mounting region is aligned with respect to an exhaust gas flow direction.

12 . The reductant injector mount of claim 1 , wherein the cut out portion is positioned closer to a downstream end of the contoured region with respect to the exhaust gas flow direction as compared to an upstream end of the contoured region.

13 . An aftertreatment system comprising:
an exhaust conduit having a cut out region provided thereon; a selective catalytic reduction module coupled to the exhaust conduit; a reductant injector mount received into the cut out region provided on the exhaust conduit, the reductant injector mount positioned upstream of the selective catalytic reduction module with respect to an exhaust gas flow, the reductant injector mount comprising:
a mounting region connected to the exhaust conduit;
a contoured region formed in the mounting region, the contoured region facing an inner side of the exhaust conduit, the contoured region being configured to:
increase a velocity of the exhaust gas flow through the contoured region; and
reduce a recirculation of the exhaust gas flow through the contoured region; and

a cut out portion provided on the contoured region; and
a reductant injector in fluid communication with the exhaust conduit, wherein the reductant injector mount is received through the cut out portion provided on the reductant injector mount.

14 . The aftertreatment system of claim 13 , wherein the reductant injector mount is attached to a top portion of the exhaust conduit.

15 . The aftertreatment system of claim 13 , wherein the reductant injector mount is disposed in a direction parallel to a direction of the exhaust gas flow.

16 . The aftertreatment system of claim 13 , wherein the reductant injector mount is disposed in a direction angular to a direction of the exhaust gas flow.

17 . The aftertreatment system of claim 13 , wherein the reductant injector mount further comprises receiving elements projecting into an interior space of the exhaust conduit from the mounting region, the receiving elements configured to receive mechanical fasteners associated with the reductant injector.

18 . A method of controlling exhaust gas flow in an exhaust conduit, the method comprising:
receiving a reductant injector through a mounting region of a reductant injector mount; flowing an exhaust gas flow on a contoured region of the reductant injector mount; increasing a velocity of the exhaust gas flow through the contoured region based on the flow; and reducing a recirculation of the exhaust gas flow through the contoured region based on the flow.

19 . The method of claim 18 , wherein the flowing step further comprises receiving the exhaust gas flow at an angle of incidence defined at an upstream end of the contoured region of the reductant injector mount with respect to a direction of flow of the exhaust gas, wherein the angle of incidence is defined by the angle formed by contoured region with respect to the mounting region of the reductant injector mount.

20 . The method of claim 18 further comprising discharging the exhaust gas flow towards a selective catalytic reduction module.

Assignees

• Caterpillar Inc

Inventors

• Venkataraghavan Jayaraman
• Driscoll James J
• Akers David A

Classifications

• F01N2340/00

  Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the exhaust apparatus; Spatial arrangements of exhaust apparatuses · CPC title

• F01N3/2839 Primary

  Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration · CPC title

• F01N3/2066 Primary

  Selective catalytic reduction [SCR] · CPC title

• F01N3/2892

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

• Y02T10/12

  Improving ICE efficiencies · CPC title