Emissions cleaning module

Patent metadata

Field	Value
Publication number	US-9528411-B2
Application number	US-201214394227-A
Country	US
Kind code	B2
Filing date	Dec 7, 2012
Priority date	Apr 24, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

An emissions cleaning module is provided including a flow conduit having an upstream end fluidly connected to a source of exhaust fluid and a downstream end fluidly connected to a mixer module. The flow conduit includes a bend upstream of the mixer module. An inner side of the bend of the flow conduit includes a funnel portion. The emissions cleaning module provides an improved arrangement for the flow of exhaust fluid.

First claim

The invention claimed is:

1. An emissions cleaning module comprising:
a flow conduit having an upstream end fluidly connected to a source of exhaust fluid and a downstream end fluidly connected to a mixer module;
the flow conduit comprises a bend upstream of the mixer module;
wherein an inner side of the bend of the flow conduit comprises a funnel portion including a concave recess.

2. An emissions cleaning module as claimed in claim 1 wherein the bend extends through at least 90°.

3. An emissions cleaning module as claimed in claim 1 or wherein the funnel portion comprises a shaped portion of the flow conduit which increases the radius of curvature of at least a portion of the inner side of the flow conduit compared to the radius of curvature of a centreline of the bend.

4. An emissions cleaning module as claimed in claim 1 wherein the inner side of the bend of the flow conduit comprises two funnel portions.

5. An emissions cleaning module as claimed in claim 1 wherein the upstream end of the flow conduit is connected to a first conduit;
wherein, in use, a direction of flow of exhaust fluid within the first conduit is opposite a direction of flow of exhaust fluid within the mixer module;
wherein the bend comprises a U-bend.

6. An emissions cleaning module as claimed in claim 5 wherein the funnel portion is located in a second half of the U-bend.

7. An emissions cleaning module as claimed in claim 1 further comprising a flow hood.

8. An emissions cleaning module as claimed in claim 7 further comprising a support which supports the flow hood and the mixer module.

9. An emissions cleaning module as claimed in claim 8 wherein the support fluidly connects the flow hood to the mixer module.

10. An emissions cleaning module as claimed in claim 8 wherein the bend is defined by the inter-engagement of the flow hood and the support.

11. An emissions cleaning module as claimed in claim 10 wherein the support comprises a bore through which may pass, in use, the flow of exhaust fluid, and the funnel portion is at least partly formed by a localised enlargement of the bore.

12. An emissions cleaning module as claimed in claim 11 wherein the funnel portion is formed by a recess in the support.

13. An emissions cleaning module as claimed in claim 11 wherein the support includes a concave portion defined on a face forming a part of the flow conduit and the bore is provided in the concave portion; the funnel being defined by a remaining portion of the concave portion.

14. An emissions cleaning module as claimed in claim 7 further comprising an injector module mounted to the flow hood.

15. An emissions cleaning module as claimed in claim 2 wherein the funnel portion comprises a shaped portion of the flow conduit which increases the radius of curvature of at least a portion of the inner side of the flow conduit compared to the radius of curvature of a centreline of the bend.

16. An emissions cleaning module as claimed in claim 3 wherein the upstream end of the flow conduit is connected to a first conduit;
wherein, in use, a direction of flow of exhaust fluid within the first conduit is opposite a direction of flow of exhaust fluid within the mixer module;
wherein the bend comprises a U-bend.

17. An emissions cleaning module as claimed in claim 9 wherein the bend is defined by the inter-engagement of the flow hood and the support.

18. An emissions cleaning module as claimed in claim 4 further comprising a flow hood.

19. An emissions cleaning module as claimed in claim 8 further comprising an injector module mounted to the flow hood.

Assignees

• Perkins Engines Co Ltd

Inventors

• Niaz Naseer A

Classifications

• F01N2240/20

  a flow director or deflector · CPC title

• F01N13/08

  Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} · CPC title

• F01N2260/022

  using air · CPC title

• F01N2610/1453

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

• F01N3/2892

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