Compact inline inlet with integrated cast ring
An exhaust gas aftertreatment system for a vehicle includes a cylindrical inner shell, a cylindrical outer shell, an inner end cap, a metal mounting member, and an outer end cap. The inner shell is configured to guide exhaust gas. The outer shell forms a first gap to the inner shell. The inner end cap encloses an open end of the outer shell. The inner end cap includes a first axially-extending lip. The inner end cap is fixed to the inner shell. The outer end cap is fixed to the inner end cap. The outer end cap includes a second axially-extending lip. The outer end cap and the inner end cap cooperate to encapsulate the mounting member. The first axially-extending lip is sandwiched between the outer shell and the second axially-extending lip.
1. An exhaust gas aftertreatment system for a vehicle comprising:
a cylindrical inner shell configured to guide exhaust gas;
a cylindrical outer shell disposed around the inner shell, the outer shell forming a first gap to the inner shell;
an outer end cap enclosing an open end of the outer shell, the outer end cap comprising a central wall and a peripheral portion, the peripheral portion comprising an axially-extending radially-inner wall, a peripheral wall extending from the radially-inner wall, and an axially-extending radially-outer lip extending from the peripheral wall and opposite the radially-inner wall, wherein the radially-inner wall, the peripheral wall, and the radially-outer lip define a pocket;
a metal mounting member partially disposed within the pocket and configured to be in fluid communication with the exhaust gas, the mounting member comprising an annular body and a central aperture; and
an inner end cap having an axially-extending lip, the axially-extending lip being coupled to the mounting member to enclose the central aperture of the mounting member, wherein the mounting member and the inner end cap enclose an open end of the inner shell.
2. The exhaust gas aftertreatment system of claim 1 , further comprising insulation disposed in at least one of the first gap and a second gap defined by the inner end cap and the outer end cap.
3. The exhaust gas aftertreatment system of claim 1 , wherein the mounting member includes a step to set the first gap between the inner shell and the outer shell.
4. The exhaust gas aftertreatment system of claim 1 , further comprising a weld disposed between the mounting member and the inner end cap, the weld sealingly coupling the mounting member and the inner end cap.
5. The exhaust gas aftertreatment system of claim 1 , wherein one of an exhaust inlet or an exhaust gas outlet is provided through one of the inner shell and the outer shell or the inner end cap and the outer end cap.
6. The exhaust gas aftertreatment system of claim 1 , wherein the mounting member includes thinned areas.
7. An exhaust gas aftertreatment system for a vehicle comprising:
a cylindrical inner shell configured to guide exhaust gas;
a cylindrical outer shell forming a first gap to the inner shell;
an inner end cap enclosing an open end of the outer shell and including a first axially-extending lip, the inner end cap being fixed to the inner shell;
a metal mounting member; and
an outer end cap fixed to the inner end cap and including a second axially-extending lip, the outer end cap and the inner end cap cooperating to encapsulate the mounting member, wherein the first axially-extending lip is sandwiched between the outer shell and the second axially-extending lip.
8. The exhaust gas aftertreatment system of claim 7 , further comprising:
a first weld disposed between the outer shell and the first axially-extending lip to sealingly couple the outer shell to the inner end cap; and
a second weld disposed between the first axially-extending lip and the second axially-extending lip to sealingly couple the inner end cap to the outer end cap, wherein a fluidly-sealed three-ply weld comprises the outer shell, the first weld, the first axially-extending lip, the second weld, and the second axially-extending lip.
9. The exhaust gas aftertreatment system of claim 8 , further comprising a third weld disposed between the inner shell and the inner end cap.
10. The exhaust gas aftertreatment system of claim 7 , wherein a radially-outer surface of the mounting member includes a radially-extending flange and the flange defines an axially-extending step, the axially-extending step partially defining the first gap.
11. The exhaust gas aftertreatment system of claim 7 , further comprising insulation disposed in at least one of the first gap or a second gap defined by the outer end cap and the inner end cap.
12. The exhaust gas aftertreatment system of claim 7 , wherein one of an exhaust inlet or an exhaust gas outlet is provided through one of the inner shell and the outer shell or the inner end cap and the outer end cap.
13. The exhaust gas aftertreatment system of claim 7 , wherein the mounting member includes thinned areas.
14. An exhaust gas aftertreatment system for a vehicle comprising:
an inner shell configured to guide exhaust gas and having a first axially-extending lip;
an outer shell fixed to the inner shell at the first axially-extending lip, the outer shell forming a first gap with the inner shell;
an inner end cap;
an outer end cap enclosing an open end of the inner shell and having a second axially-extending lip; and
a metal mounting member enclosed in an annular area defined by the outer end cap, the inner end cap, and the inner shell, wherein the inner end cap is fixed to one of the mounting member or the inner shell and the first axially-extending lip is sandwiched between the outer shell and the second axially-extending lip.
15. The exhaust gas aftertreatment system of claim 14 , further comprising:
a first weld disposed between an open end of the outer shell and the first axially-extending lip to sealingly couple the outer shell to the inner shell; and
a second weld disposed between the first axially-extending lip and the second axially-extending lip to sealingly couple the inner shell to the outer end cap, wherein a fluidly-sealed three-ply weld comprises the outer shell, the first weld, the first axially-extending lip, the second weld, and the second axially-extending lip.
16. The exhaust gas aftertreatment system of claim 15 , further comprising a third weld disposed between the inner end cap and the inner shell.
17. The exhaust gas aftertreatment system of claim 14 , wherein the mounting member includes a radially-extending flange and the flange defines an axially-extending step, the axially-extending step partially defining the first gap.
18. The exhaust gas aftertreatment system of claim 14 , further comprising insulation disposed in at least one of the first gap or a second gap defined by the outer end cap and the inner end cap.
19. The exhaust gas aftertreatment system of claim 14 , wherein one of an exhaust inlet or an exhaust gas outlet is provided through one of the inner shell and the outer shell or the inner end cap and the outer end cap.
20. The exhaust gas aftertreatment system of claim 14 , wherein the mounting member includes thinned areas.