Exhaust-gas turbocharger with acoustically active imperfections

Patent metadata

Field	Value
Publication number	US-9683485-B2
Application number	US-201514722698-A
Country	US
Kind code	B2
Filing date	May 27, 2015
Priority date	May 28, 2014
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

An exhaust-gas turbocharger ( 1 ) having a turbine housing ( 2 ), which has a bypass duct ( 10 ) with a bypass opening ( 9 ); and having a control flap ( 3 ), which is mounted pivotably between a closed position and an open position in the turbine housing ( 2 ), the control flap ( 3 ), when in its closed position, resting on a bearing region ( 8 ) of a housing wall ( 11 ) which conducts exhaust gas and contains the bypass opening ( 9 ), wherein at least one flow imperfection ( 12 A, 12 B; 23 A, 23 B) is arranged in the turbine housing wall ( 11 ) in the bearing region ( 8 ) of the control flap ( 3 ) and/or in the control flap ( 3 ).

First claim

The invention claimed is:

1. An insert ring ( 13 ) adapted to be seated in a bypass opening ( 9 ) of an exhaust-gas turbocharger ( 1 ), the insert ring ( 13 ) having at least one flow imperfection ( 12 ; 12 A, 12 B; 23 A, 23 B) in a form of a bevel, a notch, a protrusion, or a flow guiding profile, being arranged completely around or partially around a circumference of the bypass opening ( 9 ) to reduce vibration excitation of flow.

2. The insert ring according to claim 1 , wherein the at least one flow imperfection is a plurality of flow imperfections ( 12 ; 12 A, 12 B; 23 A, 23 B).

3. The insert ring according to claim 2 , wherein the plurality of the flow imperfections ( 12 ; 12 A, 12 B; 23 A, 23 B) is arranged around the circumference of the bypass opening ( 9 ) at varying intervals (A 1 , A 2 ) apart.

4. The insert ring according to claim 2 , wherein the plurality of the flow imperfections ( 12 ; 12 A, 12 B; 23 A, 23 B) is arranged completely around the bypass opening ( 9 ).

5. The insert ring according to claim 2 , wherein the plurality of the flow imperfections ( 12 ; 12 A, 12 B; 23 A, 23 B) is arranged partially around the bypass opening ( 9 ).

6. The insert ring according to claim 2 , wherein the plurality of the flow imperfections ( 12 ; 12 A, 12 B; 23 A, 23 B) in a bearing region ( 8 ) is provided with different separations from each other.

7. The insert ring according to claim 1 , wherein the at least one flow imperfection ( 12 ; 12 A, 12 B; 23 A, 23 B) has a width (B) or a depth (T) which varies.

8. An exhaust-gas turbocharger ( 1 ) having
a turbine housing ( 2 ), which has a bypass duct ( 10 ) with a bypass opening ( 9 ); and
a control flap ( 3 ), which is mounted pivotably between a closed position and an open position in the turbine housing ( 2 ), the control flap ( 3 ), when in its closed position, resting on a bearing region ( 8 ) of a housing wall ( 11 ) which conducts exhaust gas and contains the bypass opening ( 9 ), and when in the open position is pivoted away from the bypass opening ( 9 ),
wherein at least one flow imperfection ( 12 ; 12 A, 12 B; 23 A, 23 B) in a form of a bevel, a notch, a protrusion, or a flow guiding profile is arranged in at least one of
the housing wall ( 11 ) in the bearing region ( 8 ) of the control flap ( 3 ), and
the control flap ( 3 ).

9. The exhaust-gas turbocharger according to claim 8 , wherein the at least one flow imperfection is a plurality of flow imperfections ( 12 ; 12 A, 12 B, 23 A, 23 B).

10. The exhaust-gas turbocharger according to claim 9 , wherein the plurality of flow imperfections ( 12 ; 12 A, 12 B; 23 A, 23 B), these are arranged distributed around the circumference of the bypass opening ( 9 ) at varying intervals (A 1 , A 2 ) apart.

11. The exhaust-gas turbocharger according to claim 9 , wherein the plurality of the flow imperfections ( 12 ; 12 A, 12 B, 23 A, 23 B) is in the form of a bevel or a notch and is completely arranged around the bypass opening ( 9 ).

12. The exhaust-gas turbocharger according to claim 9 , wherein the plurality of the flow imperfections ( 12 ; 12 A, 12 B, 23 A, 23 B) is in the form of a bevel or a notch having a width (B) and a depth (T) and wherein the plurality of the flow imperfections ( 12 , 12 A, 12 B; 23 A, 23 B) is arranged partially around the bypass opening ( 9 ).

13. The exhaust-gas turbocharger according to claim 9 , wherein the plurality of the flow imperfections ( 12 ; 12 A, 12 B; 23 A, 23 B) in the bearing region ( 8 ) is provided with different separations from each other.

14. The exhaust-gas turbocharger according to claim 8 , wherein the at least one flow imperfection ( 12 ; 12 A, 12 B; 23 A, 23 B) has a width (B) or a depth (T) which varies.

15. The exhaust-gas turbocharger according to claim 8 , wherein the at least one flow imperfection ( 12 ; 12 A, 12 B; 23 A, 23 B) is formed in an insert ring ( 13 ) inserted in the bypass opening ( 9 ).

Assignees

• Borgwarner Inc

Inventors

• Dellmann Udo
• Nawrath Ivo
• Ebert Stefan

Classifications

• F02B39/16 Primary

  Other safety measures for, or other control of, pumps · CPC title

• F02B37/183

  Arrangements of bypass valves or actuators therefor · CPC title

• Y02T10/144

  Cross-Sectional Technologies · mapped topic

• Y02T10/12

  Improving ICE efficiencies · CPC title