Exhaust pipe flange

Patent metadata

Field	Value
Publication number	US-9771852-B2
Application number	US-201514631981-A
Country	US
Kind code	B2
Filing date	Feb 26, 2015
Priority date	Mar 12, 2014
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

An exhaust pipe flange with an exhaust gas pipe and with a flange plate fastened to the exhaust gas pipe, wherein the flange plate has an inner side which can be turned toward a cylinder head with a sealing surface which can be placed directly or indirectly against a cylinder head, and a seat in which the exhaust gas pipe is received. The exhaust gas pipe is joined to the flange plate and sealed in the region of the seat on the inner side by a welded connection.

First claim

What is claimed is:

1. An exhaust pipe flange, comprising: an exhaust gas pipe and a flange plate fastened to the exhaust gas pipe, wherein the flange plate has an inner side of the flange turned toward a cylinder head with a sealing surface placed indirectly against the cylinder head, and a seat in which the exhaust gas pipe is received, wherein the exhaust gas pipe is joined to the flange plate and sealed in a region of the seat on the inner side by a welded connection, wherein a cooling body with a receiving opening is provided, which is placed on one end of the exhaust gas pipe via the receiving opening and is either placed directly against the sealing surface of the flange plate or indirectly against the sealing surface of the flange plate with a seal located between the cooling body and flange plate, wherein the exhaust gas pipe extends axially either a) into the receiving opening of the cooling body or b) through and beyond the receiving opening of the cooling body such that the exhaust gas pipe is accommodated within the outlet opening of the cylinder head.

2. The exhaust pipe flange according to claim 1 , wherein a recess with a support surface is provided around the exhaust gas pipe on the inner side, which stands back in relation to the sealing surface by a dimension “a” of at least 2 mm and the weld connection is provided at least partly in the recess and on the support surface.

3. The exhaust pipe flange according to claim 2 , wherein the weld connection protrudes by a dimension “b” of at least 0.5 mm above the sealing surface for mounting on a cylinder head having a slot at an outlet opening in which the weld connection can be at least partly accommodated.

4. The exhaust pipe flange according to claim 2 , wherein the cooling body has a slot at the receiving opening in which the weld connection is at least partly accommodated.

5. The exhaust pipe flange according to claim 4 , wherein the cooling body has a coolant channel or borders on a coolant channel.

6. The exhaust pipe flange according to claim 1 , wherein the weld connection protrudes by a dimension “b” of at least 0.5 mm above the sealing surface for mounting on a cylinder head having a slot at an outlet opening in which the weld connection can be at least partly accommodated.

7. The exhaust pipe flange according to claim 1 , wherein the cooling body has a slot at the receiving opening in which the weld connection is at least partly accommodated.

8. The exhaust pipe flange according to claim 7 , wherein the cooling body has a coolant channel or borders on a coolant channel.

9. The exhaust pipe flange according to claim 1 , wherein the cooling body has a coolant channel or borders on a coolant channel.

10. The exhaust pipe flange according to claim 1 , wherein the exhaust gas pipe is formed from clamshells or configured as a shell manifold.

11. A group flange with several exhaust pipe flanges and several exhaust gas pipes according to claim 1 , wherein the respective exhaust gas pipe is connected to an adjacent exhaust gas pipe, the exhaust gas pipes being of modular design and at least two identical exhaust gas pipes being coupled together.

12. An exhaust system of an internal combustion engine with an exhaust pipe flange or a group flanges according to claim 11 .

13. An exhaust system of an internal combustion engine with the exhaust pipe flange according to claim 1 .

14. The exhaust pipe flange according to claim 1 , wherein a seal is present between the cylinder head and the cooling body by which the cooling body is sealingly attached to the cylinder head.

15. An exhaust pipe flange, comprising: an exhaust gas pipe and a flange plate fastened to the exhaust gas pipe, wherein the flange plate has an inner side turned toward a cylinder head with a sealing surface placed indirectly against the cylinder head, an opposite outer side, and a seat in which the exhaust gas pipe is received, wherein a cooling body with a receiving opening is provided, which is placed on one end of the exhaust gas pipe via the receiving opening and is either placed directly against the sealing surface of the flange plate or indirectly against the sealing surface of the flange plate with a seal located between the cooling body and flange plate, the exhaust gas pipe being connected to the flange plate and sealed by a weld connection on the outer side in the region of the seat, wherein the exhaust gas pipe extends axially either a) into the receiving opening of the cooling body or b) through and beyond the receiving opening of the cooling body such that the exhaust gas pipe is accommodated within the outlet opening of the cylinder head.

16. The exhaust pipe flange according to claim 15 , wherein the cooling body has a coolant channel or borders on a coolant channel.

17. A group flange with several exhaust pipe flanges and several exhaust gas pipes according to claim 15 , wherein the respective exhaust gas pipe is connected to an adjacent exhaust gas pipe, the exhaust gas pipes being of modular design and at least two identical exhaust gas pipes being coupled together.

18. The exhaust pipe flange according to claim 15 , wherein the exhaust gas pipe is formed from clamshells or configured as a shell manifold.

19. An exhaust system of an internal combustion engine with the exhaust pipe flange according to claim 15 .

20. An exhaust pipe flange, comprising: an exhaust gas pipe and a flange plate fastened to the exhaust gas pipe, wherein the flange plate has an inner side of the flange turned toward a cylinder head with a sealing surface placed indirectly against the cylinder head, and a seat in which the exhaust gas pipe is received, wherein the exhaust gas pipe is joined to the flange plate and sealed in a region of the seat on the inner side by a welded connection, wherein a cooling body with a receiving opening is provided, which is placed on one end of the exhaust gas pipe via the receiving opening and is either placed directly against the sealing surface of the flange plate or indirectly against the sealing surface of the flange plate with a seal located between the cooling body and flange plate, wherein the cooling body has a slot at the receiving opening in which the weld connection is at least partly accommodated.

21. The exhaust pipe flange according to claim 20 , wherein a recess with a support surface is provided around the exhaust gas pipe on the inner side, which stands back in relation to the sealing surface by a dimension “a” of at least 2 mm and the weld connection is provided at least partly in the recess and on the support surface.

22. The exhaust pipe flange according to claim 21 , wherein the cooling body has a coolant channel or borders on a coolant channel.

23. The exhaust pipe flange according to claim 20 , wherein the cooling body has a coolant channel or borders on a coolant channel.

24. An exhaust pipe flange, comprising: an exhaust gas pipe and a flange plate fastened to the exhaust gas pipe, wherein the flange plate has an inner side of the flange turned toward a cylinder head with a sealing surface placed indirectly against the cylinder head, and a seat in which the exhaust gas pipe is received, wherein the exhaust gas pipe is joined to the flange plate and sealed in a region of the seat on the inner side by a welded connection, wherein a cooling body with a receiving opening is provided, which is placed on one end of the exhaust gas pipe via the receiving opening and is either placed directly agai

Assignees

• Tenneco Gmbh

Inventors

• Steigert Andreas
• Geminn Markus

Classifications

• F01N13/10

  of exhaust manifolds {(with cooling jacket F01N3/046)} · CPC title

• F01N3/02

  for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N3/01 {; mixing air with exhaust in tailpipes F01N13/082, F01N13/20}) · CPC title

• F01N13/1827 Primary

  Sealings specially adapted for exhaust systems (sealings in general F16J15/00) · CPC title

• F01N2450/22

  by welding or brazing · CPC title

• F01N13/1805

  Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body (pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K) · CPC title