Exhaust treatment device

Patent metadata

Field	Value
Publication number	US-10940451-B2
Application number	US-201816230030-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Jun 12, 2015
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

An exhaust treatment arrangement includes a mixing assembly disposed between first and second substrates; and an injection mounting location disposed at the mixing assembly. The mixing assembly includes a mixing arrangement configured to direct exhaust flow exiting the first substrate in a swirling configuration, a restricting member defining a restricted passage, and optionally a dispersing member configured to even out the exhaust flow.

First claim

What is claimed is:

1. An exhaust treatment arrangement comprising:
a mixing arrangement having a peripheral surface surrounding a central longitudinal axis to define a flow passage, the mixing arrangement including:
a deflection body extending across the flow passage to divide the flow passage into a first region upstream of the deflection body and a second region downstream of the deflection body, the deflection body defining an aperture that provides access between the first and second regions, the aperture being offset from the central longitudinal axis of the mixing arrangement by a first distance in a first direction transverse to the central longitudinal axis;
a doser mounting location disposed at the first region of the flow passage; and
a conduit disposed at the first region of the flow passage, the conduit extending between a first end and a second end, the first end being disposed at the aperture defined by the deflection body, the second end being disposed at the doser mounting location, the conduit including perforations extending between an exterior of the conduit and an interior of the conduit; and

a downstream exhaust treatment substrate disposed downstream of the mixing arrangement.

2. The exhaust treatment arrangement of claim 1 , wherein the aperture defined by the deflection body is offset from the central longitudinal axis of the mixing arrangement by a second distance in a second direction transverse to the central longitudinal axis and to the first distance.

3. The exhaust treatment arrangement of claim 2 , wherein the first distance is greater than the second distance.

4. The exhaust treatment arrangement of claim 1 , wherein the aperture defined by the deflection body extends along a plane that is parallel with the central longitudinal axis of the mixing arrangement.

5. The exhaust treatment arrangement of claim 1 , wherein the conduit has a central longitudinal axis extending between the first and second ends of the conduit, and wherein the doser mounting location is positioned in alignment with the central longitudinal axis of the conduit.

6. The exhaust treatment arrangement of claim 5 , wherein the central longitudinal axis of the conduit is perpendicular to the central longitudinal axis of the mixing arrangement.

7. The exhaust treatment arrangement of claim 1 , wherein the conduit includes a cylindrical tube.

8. The exhaust treatment arrangement of claim 1 , wherein the conduit extends across a majority of a cross-dimension of the flow passage.

9. The exhaust treatment arrangement of claim 1 , wherein the deflection body includes a plate that extends across the flow passage at a non-perpendicular angle to the central longitudinal axis of the mixing arrangement.

10. The exhaust treatment arrangement of claim 9 , wherein the deflection body also includes a contoured section that extends partially around the conduit, the contoured section defining at least part of the aperture.

11. The exhaust treatment arrangement of claim 1 , further comprising a restricting member disposed downstream of the deflection body and upstream of the downstream exhaust treatment substrate, the restricting member including a baffle extending across the flow passage, the restricting member also including a duct extending from the baffle towards the deflection body, the duct defining a passage through the baffle.

12. The exhaust treatment arrangement of claim 11 , wherein the passage aligns with the central longitudinal axis of the mixing arrangement.

13. The exhaust treatment arrangement of claim 11 , wherein a length of the duct is shorter than a cross-dimension of the conduit.

14. The exhaust treatment arrangement of claim 11 , further comprising a dispersing member disposed downstream of the restricting member, the dispersing member being configured to expand exhaust flow.

15. The exhaust treatment arrangement of claim 1 , further comprising a deflector disposed in the second region of the flow passage, the deflector extending downstream of the deflection body and across the aperture, the deflector being spaced radially inwardly from the conduit and outwardly from the aperture.

16. The exhaust treatment arrangement of claim 1 , further comprising a mesh disposed in the conduit.

17. The exhaust treatment arrangement of claim 16 , wherein the mesh has an upstream end face that is generally parallel to the central longitudinal axis of the mixing arrangement.

18. The exhaust treatment arrangement of claim 16 , wherein the mesh extends fully across the conduit upstream of the aperture.

19. The exhaust treatment arrangement of claim 1 , further comprising an upstream exhaust treatment substrate disposed upstream of the mixing arrangement, the upstream exhaust treatment substrate and the downstream exhaust treatment substrate being coaxially aligned with the mixing arrangement.

20. The exhaust treatment arrangement of claim 1 , wherein the downstream exhaust treatment substrate includes a selective catalytic reduction an SCR substrate.

Assignees

• Donaldson Co Inc

Inventors

• Brandl Mark Thomas
• De Rudder Korneel
• Hoppenstedt Bruce
• Whitten Matthew S

Classifications

• F01N3/2892 Primary

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

• B01F25/4522 Primary

  the components being pressed through porous bodies, e.g. flat plates, blocks or cylinders, which obstruct the whole diameter of the tube (B01F25/45243 takes precedence) · CPC title

• B01F2025/931

  Flow guiding elements surrounding feed openings, e.g. jet nozzles · CPC title

• B01F23/2132

  using nozzles · CPC title

• B01F25/4523

  the components being pressed through sieves, screens or meshes which obstruct the whole diameter of the tube · CPC title