Device for exhaust-gas routing having a turbocharger

Patent metadata

Field	Value
Publication number	US-10774663-B2
Application number	US-201715851981-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Dec 22, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A turbocharger assembly for an internal combustion engine, in particular of a commercial vehicle, has a turbocharger with a turbine housing. The turbocharger assembly additionally has an exhaust-gas pipe. The exhaust-gas pipe is arranged downstream of the turbine housing. The exhaust-gas pipe has a diffusor region and an exhaust-gas manifold region.

First claim

The invention claimed is:

1. A turbocharger assembly for an internal combustion engine comprising:
a turbocharger with a turbine housing;
an exhaust-gas pipe which is arranged downstream of the turbine housing and has a diffusor region defined by an increase in size of the exhaust-gas pipe cross section and an exhaust-gas manifold region; and
a wastegate duct which has at least one passage through a pipe wall of the exhaust-gas pipe, wherein the at least one passage is provided downstream of the diffusor region.

2. The turbocharger assembly according to claim 1 , wherein the diffusor region extends at least partially into the turbine housing.

3. The turbocharger assembly according to claim 2 , wherein the diffusor region extends substantially into the turbine housing.

4. The turbocharger assembly according to claim 1 , wherein the exhaust-gas pipe is formed in one piece and/or is a cast part.

5. The turbocharger assembly according to claim 1 , wherein the at least one passage is provided upstream of the exhaust-gas manifold region.

6. The turbocharger assembly according to claim 1 , wherein the at least one passage is formed such that a flow through the passage is channelled into the exhaust-gas pipe such that the flow from the passage impinges a flow through the exhaust-gas pipe at an angle of less than 90°.

7. The turbocharger assembly according to claim 1 , wherein the at least one passage is formed such that a flow through the passage is channelled into the exhaust-gas pipe such that the flow from the passage impinges a flow through the exhaust-gas pipe at an angle of less than 45°.

8. The turbocharger assembly according to claim 1 , wherein the at least one passage is formed such that a flow through the passage is channelled into the exhaust-gas pipe such that the flow from the passage impinges a flow through the exhaust-gas pipe at an angle of less than 25°.

9. The turbocharger assembly according to claim 1 , wherein a plurality of passages of the wastegate duct through the pipe wall of the exhaust-gas pipe are arranged at equal spaces in a circumferential direction about a longitudinal axis of the exhaust-gas pipe.

10. The turbocharger assembly according to claim 1 , wherein an inlet opening of the at least one passage is formed by a metal-cutting process.

11. The turbocharger assembly according to claim 10 , wherein the metal-cutting process is a turning process.

12. The turbocharger assembly according to claim 1 , wherein an outlet opening of the at least one passage is formed by a casting process.

13. The turbocharger assembly according to claim 1 , wherein the diffusor region and the exhaust-gas manifold region at least partially overlap.

14. The turbocharger assembly according to claim 1 , wherein the diffusor region extends substantially rectilinearly.

15. The turbocharger assembly according to claim 1 , wherein the exhaust-gas pipe further has a flange region for flanging the exhaust-gas pipe onto the turbine housing.

16. The turbocharger assembly according to claim 15 , wherein the flange region is arranged downstream of an inlet opening of the exhaust-gas pipe.

17. The turbocharger assembly according to claim 15 , wherein the flange region is arranged downstream of the diffusor region.

18. The turbocharger assembly according to claim 15 , where the flange region is arranged upstream of the exhaust-gas manifold region.

19. The turbocharger assembly according to claim 15 , wherein the at least one passage extends at least partially through the flange region.

20. The turbocharger assembly of claim 1 , wherein the internal combustion engine is configured for a commercial vehicle.

21. A motor vehicle comprising:
a turbocharger assembly for an internal combustion engine having:
a turbocharger with a turbine housing;
an exhaust-gas pipe which is arranged downstream of the turbine housing and has a diffusor region defined by an increase in size of the exhaust-gas pipe cross section and an exhaust-gas manifold region; and
a wastegate duct which has at least one passage through a pipe wall of the exhaust-gas pipe, wherein the at least one passage is provided downstream of the diffusor region.

22. The motor vehicle of claim 21 , wherein the motor vehicle is a commercial vehicle.

Assignees

• Man Truck & Bus Ag

Inventors

• Leitel Thomas
• Polster Dominik

Classifications

• F01D9/045 Primary

  for radial flow machines or engines · CPC title

• F01N13/08 Primary

  Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} · CPC title

• F01N13/00

  Exhaust or silencing apparatus characterised by constructional features · CPC title

• F02B37/00

  Engines characterised by provision of pumps driven at least for part of the time by exhaust · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title