Vehicle exhaust system mixer with flexible doser mount

Patent metadata

Field	Value
Publication number	US-11624310-B2
Application number	US-202016834182-A
Country	US
Kind code	B2
Filing date	Mar 30, 2020
Priority date	Mar 30, 2020
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

A component for a mixer of a vehicle exhaust system, according to an exemplary aspect of the present disclosure includes, among other things, a doser mount comprising a curved body having a center boss with a doser opening defining a doser axis. The curved body includes at least a first mating surface configured to receive a first mixer shell defined by a first dimension and a second mating surface configured to receive a second mixer shell defined by a second dimension different than the first dimension.

First claim

What is claimed is:

1. A component for a mixer of a vehicle exhaust system comprising:
a doser mount comprising a curved body having a center boss with a doser opening defining a doser axis, wherein the curved body includes at least a first mating surface configured to receive a first mixer shell defined by a first dimension to provide a first mixer type and a second mating surface configured to receive a second mixer shell defined by a second dimension different than the first dimension to provide a second mixer type different than the first mixer type, and wherein the first mixer shell and the second mixer shell each comprise an outer mixer housing that defines an internal cavity which surrounds a mixer center axis that is non-concentric with the doser axis.

2. The component according to claim 1 , wherein the second dimension is greater than the first dimension.

3. The component according to claim 2 , wherein the first dimension comprises an inner diameter of the first mixer shell and the second dimension comprises an inner diameter of the second mixer shell.

4. The component according to claim 2 , wherein the center boss includes a flat surface that is spaced from the curved body by a shoulder, and wherein the flat surface comprises an attachment interface for a doser configured to inject a fluid through the doser opening.

5. The component according to claim 4 , wherein the first mating surface of the curved body has a first curvature and the second mating surface of the curved body has a second curvature that is greater than the first curvature, and wherein the first and second mating surfaces are staggered such that the second mating surface is radially inward of the first mating surface relative to the doser axis.

6. The component for a mixer according to claim 1 , wherein either the first mixer shell or the second mixer shell is mounted to the doser mount to provide the outer mixer housing that defines the internal cavity for the mixer.

7. A component for a mixer of a vehicle exhaust system comprising:
a doser mount comprising a curved body having a center boss with a doser opening defining a doser axis, wherein the curved body includes at least a first mating surface configured to receive a first mixer shell defined by a first dimension to provide a first mixer type and a second mating surface configured to receive a second mixer shell defined by a second dimension greater than the first dimension to provide a second mixer type different than the first mixer type, wherein the first dimension comprises an inner diameter of the first mixer shell and the second dimension comprises an inner diameter of the second mixer shell, and wherein the doser mount comprises a single mount to which either the first or second mixer shell is mounted.

8. A component for a mixer of a vehicle exhaust system comprising:
a doser mount comprising a curved body having a center boss with a doser opening defining a doser axis, wherein the curved body includes at least a first mating surface configured to receive a first mixer shell defined by a first dimension to provide a first mixer type and a second mating surface configured to receive a second mixer shell defined by a second dimension greater than the first dimension to provide a second mixer type different than the first mixer type, and wherein the center boss includes a flat surface that is spaced from the curved body by a shoulder, and wherein the flat surface comprises an attachment interface for a doser configured to inject a fluid through the doser opening, and wherein each of the first and second mixer shells define a mixer center axis, and including a second shoulder that separates the center boss from the second mating surface and a third shoulder that separates the second mating surface from the first mating surface such that the second mating surface is radially outward of the first mating surface relative to the mixer center axis.

9. A component for a mixer of a vehicle exhaust system comprising:
a doser mount comprising a curved body having a center boss with a doser opening defining a doser axis, wherein the curved body includes at least a first mating surface configured to receive a first mixer shell defined by a first dimension to provide a first mixer type and a second mating surface configured to receive a second mixer shell defined by a second dimension different than the first dimension to provide a second mixer type different than the first mixer type; and
a plurality of flow elements each having an upstream end fixed to the doser mount and a downstream end, and wherein the plurality of flow elements are attached to each other to form a swirl chamber, and wherein each flow element provides a curved inwardly facing surface that forms at least a portion of an inner peripheral wall of the swirl chamber.

10. A component for a mixer of a vehicle exhaust system comprising:
a doser mount comprising a curved body having a center boss with a doser opening defining a doser axis, wherein the curved body includes at least a first mating surface configured to receive a first mixer shell defined by a first dimension and a second mating surface configured to receive a second mixer shell defined by a second dimension different than the first dimension;
a plurality of flow elements each having an upstream end fixed to the doser mount and a downstream end, and wherein the plurality of flow elements are attached to each other to form a swirl chamber; and
wherein the plurality of flow elements comprise at least first, second, and third flow elements, and wherein the doser mount includes at least a first flange area extending in an opposite direction from the center boss and at least partially surrounding the doser opening and a second flange area extending at least partially about a peripheral edge of the curved body, and where in the upstream ends of the first and second flow elements are associated with the first flange area and the upstream end of the third flow element is associated with the second flange area.

11. The component according to claim 10 , wherein the first flow element forms one portion of a swirl chamber and the second flow element forms a remaining portion of the swirl chamber, the first and second flow elements fixed to each other to surround the doser axis, and wherein the third flow element has an arm portion at the downstream end that is fixed to one of the first and second flow elements and the upstream end of the third flow element is seated against the second flange area, and wherein a first open space is created between an outer surface of the second flow element and an inner surface of the third flow element and a second open space is created between an outer surface of the first flow element and an inner surface of the second flow element.

12. A vehicle exhaust system component comprising:
a mixer having an upstream end configured to be connected to an upstream exhaust component and a downstream end configured to be connected to a downstream component, the mixer having a mixer shell providing an internal cavity that surrounds a mixer center axis, and wherein the mixer shell has a doser opening;
a doser mount mounted to the mixer at the doser opening, wherein the doser mount is configured to support a doser that injects a fluid into the internal cavity of the mixer shell, and wherein the doser mount comprises a curved body having a center boss with a doser mount opening defining a doser axis, wherein the curved body includes at least a first mating surface configured to receive a first mixer shell defined by a first dimension and a second mating surface configured to receive a second mixer shell defined by a second dimension

Assignees

• Faurecia Emissions Control Technologies Usa Llc

Inventors

• Cvelbar Randall
• Alano Eduardo
• Bhatt Amee
• Rakkasagi Amaresh
• Burnett Anthony

Classifications

• F01N2240/20

  a flow director or deflector · CPC title

• F01N2610/1453

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

• F01N2610/02

  the substance being ammonia or urea · CPC title

• B01F25/102

  wherein the vortex is created by two or more jets introduced tangentially in separate mixing chambers or consecutively in the same mixing chamber · CPC title

• F01N13/009

  having two or more separate purifying devices arranged in series · CPC title