Composite exhaust gas recirculation cooler

Patent metadata

Field	Value
Publication number	US-9897388-B2
Application number	US-201113251569-A
Country	US
Kind code	B2
Filing date	Oct 3, 2011
Priority date	Oct 4, 2010
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A cooler having a first component made of at least one of steel, stainless steel, plastic and ceramic. A second component may be made of aluminum, wherein the two components may be connected to each other in a connecting area via a friction stir weld joint.

First claim

The invention claimed is:

1. A composite exhaust gas recirculation cooler, comprising:
a first component made of at least one plastic and ceramic; and
a second component made of a material that is at least predominantly aluminum;
wherein the two components abut one on top of the other in a connecting area where the two components are connected to each other via a friction stir weld joint without any filler material to form a diffusion bond there between;
wherein the first component is reinforced in the connecting area and includes a cooler shell and two cooler bottoms at opposing ends of the cooler shell in an exhaust gas flow direction, and the second component is configured as at least one of a coolant nozzle and a housing; and
wherein one cooler bottom is thicker than the other cooler bottom.

2. The composite exhaust gas recirculation cooler according to claim 1 , wherein the cooler is configured as an I-cooler.

3. The composite exhaust gas recirculation cooler according to claim 1 , wherein the cooler has at least one of a valve housing and a flap housing.

4. The composite exhaust gas recirculation cooler according to claim 1 , wherein the cooler has a bypass channel.

5. The composite exhaust gas recirculation cooler according to claim 1 , wherein the connecting area of the two components is stiffened by the cooler bottoms.

6. The composite exhaust gas recirculation cooler according to claim 1 , wherein the cooler bottoms have at least one of a generally rectangular and oval cross-section.

7. The composite exhaust gas recirculation cooler according to claim 1 , wherein the one cooler bottom is a reinforced cooler bottom.

8. The composite exhaust gas recirculation cooler according to claim 2 , wherein the cooler has at least one of a valve housing and a flap housing.

9. The composite exhaust gas recirculation cooler according to claim 8 , wherein the cooler has a bypass channel.

10. The composite exhaust gas recirculation cooler according to claim 9 , wherein the connecting area of the two components is stiffened by the cooler bottoms.

11. The composite exhaust gas recirculation cooler according to claim 10 , wherein the cooler bottoms have at least one of a generally rectangular and oval cross-section.

12. The composite exhaust gas recirculation cooler according to claim 1 , wherein the cooler has a valve housing.

13. The composite exhaust gas recirculation cooler according to claim 1 , wherein the cooler has a flap housing.

14. The composite exhaust gas recirculation cooler according to claim 1 , wherein the second component is configured as a housing.

15. A composite exhaust gas recirculation cooler, comprising:
a first component made of at least one of plastic and ceramic; and
a second component made of a material that is at least predominantly aluminum;
wherein the two components abut one on top of the other in a connecting area where the two components are connected to each other via a friction stir weld joint without any filler material;
wherein the first component includes a cooler shell and two cooler bottoms at opposing ends of the cooler shell in an exhaust gas flow direction, and the second component is configured as at least one of a coolant nozzle and a housing; and
wherein one cooler bottom is thicker than the other cooler bottom.

16. The composite exhaust gas recirculation cooler according to claim 1 , wherein the one cooler bottom has a bent edge with which the one cooler bottom rests flatly against a projection of the cooler shell.

Assignees

• Dittmann Joerg
• Jaiβle Richard
• Mahle Int Gmbh

Inventors

• Dittmann Joerg
• Jaiβle Richard

Classifications

• F02M26/32

  Liquid-cooled heat exchangers · CPC title

• F28F9/02

  Header boxes; End plates · CPC title

• F28D7/1684 Primary

  the conduits having a non-circular cross-section · CPC title

• Y02T10/146

  Cross-Sectional Technologies · mapped topic

• F28F2225/08

  for header boxes · CPC title