Exhaust gas turbocharger

Patent metadata

Field	Value
Publication number	US-10494990-B2
Application number	US-201615548031-A
Country	US
Kind code	B2
Filing date	Feb 2, 2016
Priority date	Feb 3, 2015
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

An exhaust gas turbocharger ( 1 ) including a compressor housing ( 2 ), a bearing housing ( 3 ), a turbine housing ( 4 ) in which a turbine wheel ( 5 ) is arranged, which has a housing inlet ( 6 ), which has a turbine spiral ( 7 ) connecting to the housing inlet ( 6 ), which has a housing outlet ( 8 ), and which has a wastegate arrangement ( 9 ), which in the open state brings the housing inlet ( 6 ) into flow connection with the housing outlet ( 8 ) for guiding a wastegate mass flow. The wastegate insert part ( 10 ) is arranged in the turbine housing ( 4 ) between the turbine wheel ( 5 ) and the housing outlet ( 8 ) and the open wastegate arrangement ( 9 ) introduces the wastegate mass flow into the wastegate insert arrangement ( 9 ).

First claim

The invention claimed is:

1. An exhaust gas turbocharger ( 1 ) comprising:
a compressor housing ( 2 ),
a bearing housing ( 3 ),
a turbine housing ( 4 ) in which a turbine wheel ( 5 ) having an axis of rotation is arranged, which has a turbine housing inlet ( 6 ), which has a turbine spiral ( 7 ) connecting to the turbine housing inlet ( 6 ), which has a turbine housing outlet ( 8 ), and which has a wastegate arrangement ( 9 ), which in the open state brings the turbine housing inlet ( 6 ) into flow connection with the turbine housing outlet ( 8 ) for guiding a wastegate mass flow, wherein
a wastegate insert part ( 10 ) is arranged in the turbine housing ( 4 ) between the turbine wheel ( 5 ) and the turbine housing outlet ( 8 ) coaxial with the turbine wheel ( 5 ) axis of rotation,
the wastegate arrangement ( 9 ) when open introduces the wastegate mass flow into the wastegate insert part ( 10 ), and
the wastegate insert part ( 10 ) is open radially inwards for introducing wastegate mass flow from the wastegate insert part ( 10 ) into the turbine housing outlet ( 8 ) coaxial with the turbine wheel ( 5 ) axis of rotation.

2. The exhaust gas turbocharger according to claim 1 , wherein the wastegate insert part ( 1 ) is a separately producible component which is inserted into the turbine housing ( 4 ) and fixed in the same.

3. The exhaust gas turbocharger according to claim 1 , wherein the wastegate insert part ( 10 ) is a sheet metal insert part ( 10 ).

4. The exhaust gas turbocharger according to claim 1 , wherein the turbine housing ( 4 ) is a cast housing.

5. The exhaust gas turbocharger according to claim 1 , wherein an annular gap ( 12 ) is arranged in the region of the turbine housing outlet ( 8 ) downstream of the wastegate insert part ( 10 ) when viewed in the flow direction (S) of the exhaust gases discharging from the turbine housing ( 4 ).

6. The exhaust gas turbocharger according to claim 1 , wherein the size of the wastegate insert part ( 10 ) is matched to the wastegate mass throughput.

7. The exhaust gas turbocharger according to claim 5 , wherein a width (B) of the annular gap ( 12 ) is matched to the wastegate mass throughput.

8. An exhaust gas turbocharger ( 1 ) comprising:
a compressor housing ( 2 ),
a bearing housing ( 3 ),
a turbine housing ( 4 ) in which a turbine wheel ( 5 ) is arranged, which has a turbine housing inlet ( 6 ), which has a turbine spiral ( 7 ) connecting to the turbine housing inlet ( 6 ), which has a turbine housing outlet ( 8 ), and which has a wastegate arrangement ( 9 ), which in the open state brings the turbine housing inlet ( 6 ) into flow connection with the turbine housing outlet ( 8 ) for guiding a wastegate mass flow, wherein
a wastegate insert part ( 10 ) is arranged in the turbine housing ( 4 ) between the turbine wheel ( 5 ) and the turbine housing outlet ( 8 ) and the wastegate arrangement ( 9 ) when open introduces the wastegate mass flow into the wastegate insert part ( 10 ), and
the wastegate insert part ( 10 ) is a wastegate spiral open radially inwards.

9. The exhaust gas turbocharger according to claim 1 , wherein the wastegate insert part ( 10 ) has a sleeve ( 18 ) which is provided with a collar ( 20 ; 29 ) on an end face.

10. The exhaust gas turbocharger according to claim 9 , wherein the collar ( 20 ) is provided with through openings ( 21 ).

11. The exhaust gas turbocharger according to claim 10 , wherein the collar ( 29 ) is connected to the sleeve ( 28 ) via spacers ( 30 ) and the through openings ( 31 ) are provided between the collar ( 29 ) and the sleeve ( 28 ).

12. The exhaust gas turbocharger according to claim 9 , wherein the insert part ( 10 ) has a sleeve body ( 32 ) which has a waist and is provided with through openings ( 33 ) directed radially inwardly.

13. The exhaust gas turbocharger according to claim 12 , wherein the sleeve body ( 32 ) is provided with an annular stop collar ( 34 ).

14. An exhaust gas turbocharger ( 1 ) comprising:
a compressor housing ( 2 ),
a bearing housing ( 3 ),
a turbine housing ( 4 ) in which a turbine wheel ( 5 ) having an axis of rotation is arranged,
which has a turbine housing inlet ( 6 ), which has a turbine spiral ( 7 ) connecting to the turbine housing inlet ( 6 ), which has a turbine housing outlet ( 8 ), and which has a wastegate arrangement ( 9 ), which in the open state brings the turbine housing inlet ( 6 ) into flow connection with the turbine housing outlet ( 8 ) for guiding a wastegate mass flow, wherein
a wastegate insert part ( 10 ) is arranged in the turbine housing ( 4 ) between the turbine wheel ( 5 ) and the turbine housing outlet ( 8 ) and the wastegate arrangement ( 9 ) when open introduces the wastegate mass flow into the wastegate insert part ( 10 ), and
the wastegate insert part ( 10 ) defines a wastegate spiral coaxial with the turbine wheel ( 5 ) axis of rotation and open radially inwards.

Assignees

• Borgwarner Inc

Inventors

• Sauerstein Rolf
• Parma Philip Christoph
• Rylance Sean
• Day Andrew

Classifications

• F02B37/18 Primary

  by bypassing exhaust {from the inlet to the outlet of turbine or to the atmosphere} · CPC title

• F01N13/14

  having thermal insulation {(exhaust manifolds F01N13/102)} · CPC title

• F01N2240/20

  a flow director or deflector · CPC title

• F01N3/2892

  Exhaust flow directors or the like, e.g. upstream of catalytic device · CPC title

• F02B37/183 Primary

  Arrangements of bypass valves or actuators therefor · CPC title