Valve for a dual-volute turbine

Patent metadata

Field	Value
Publication number	US-12044162-B2
Application number	US-202318123036-A
Country	US
Kind code	B2
Filing date	Mar 17, 2023
Priority date	Aug 16, 2022
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

A valve (100) controls a volute connecting opening (240) and a bypass opening (250) of a dual-volute turbine (200). The valve (100) has valve closing body (110), a lever arm (120) and a spindle (130). The valve closing body (110) has a main body (111) and a collar (112). The valve (100) is of a monoblock design with the valve closing body (110), the lever arm (120) and the spindle (130) being made of a single part.

First claim

The invention claimed is:

1. A valve ( 100 ) for controlling a volute connecting opening ( 240 ) and a bypass opening ( 250 ) of a dual-volute turbine ( 200 ), the valve ( 100 ) comprising a valve closing body ( 110 ), a lever arm ( 120 ) and a spindle ( 130 ), wherein the valve closing body ( 110 ) has a main body ( 111 ) and a collar ( 112 ), and wherein the valve ( 100 ) is of a monoblock design with the valve closing body ( 110 ), the lever arm ( 120 ) and the spindle ( 130 ) being made of a single part,
wherein an outer contour of the main body ( 111 ) defines a volute connection sealing surface ( 112 a ) for sealing volute connecting opening ( 240 ), and wherein the collar ( 112 ) defines a bypass sealing surface ( 112 a ) for sealing the bypass opening ( 250 ), wherein the outer contour of the main body ( 111 ) has a curved shape from the bypass sealing surface ( 112 a ) to a bottom ( 115 ) of the main body ( 111 ), wherein the main body ( 111 ) is axisymmetric about a valve axis ( 114 ), wherein the outer contour of the main body ( 111 ) is defined by multiple radii about the valve axis ( 114 ) which decrease in a direction from the bypass sealing surface ( 112 a ) to the bottom ( 115 ) of the main body ( 111 ),
wherein the lever arm ( 120 ) has a curved shape which extends on an upper side of the collar ( 112 ) opposite to the bypass sealing surface ( 112 a ) between the collar ( 112 ) and the spindle ( 130 ) such that the bypass sealing surface ( 112 a ) is better aligned to a bypass valve seat ( 252 ) located around the bypass opening ( 250 ) by elastic deformation of the lever arm ( 120 ) upon operating torque acting on the spindle ( 130 ), and
wherein the outer contour of the main body ( 111 ) and the bypass sealing surface ( 112 a ) are machined, such that a first gap ( 244 ) formed between the volute connection valve seat ( 242 ) and the volute connection sealing surface ( 112 a ) is minimized and such that a second gap ( 254 ) between the bypass valve seat ( 242 ) and the bypass sealing surface ( 112 a ) is eliminated or minimized by the machined monoblock valve ( 100 ).

2. The valve ( 100 ) of claim 1 , wherein the main body ( 111 ) is substantially bowl shaped and wherein the collar ( 112 ) forms a rim of the main body ( 111 ) and defines a valve axis ( 114 ).

3. The valve ( 100 ) of claim 1 , wherein the valve closing body ( 110 ) is hollow.

4. The valve ( 100 ) of claim 1 , wherein the lever arm ( 120 ) is connected to at least one of the collar ( 112 ) and an inner contour of the main body ( 111 ).

5. The valve ( 100 ) of claim 1 , wherein the lever arm ( 120 ) defines a sealing shoulder ( 122 ) which circumferentially surrounds the spindle ( 130 ) and which points in a direction parallel to a pivoting axis ( 133 ) defined by the spindle ( 130 ).

6. The valve ( 100 ) of claim 5 , wherein an outer contour of the spindle ( 130 ) and the sealing shoulder ( 122 ) are machined.

7. A dual-volute turbine ( 200 ) for an exhaust gas turbocharger, the turbine ( 200 ) comprising:
a turbine housing ( 230 ) with a first volute ( 236 ) and a second volute ( 238 ) which are fluidically separated by a divider wall ( 234 );
a turbine wheel ( 220 ) arranged between a turbine inlet ( 232 a , 232 b ) and a turbine outlet ( 233 ) of the turbine housing ( 230 );
wherein the turbine housing ( 230 ) defines a valve region ( 210 ), the valve region ( 210 ) comprising:
a volute connection opening ( 240 ) in the divider wall ( 234 ) to fluidically couple the first volute ( 236 ) and the second volute ( 238 ), and
a bypass opening ( 250 ) via which the volutes are directly fluidically connectable to the turbine outlet ( 233 ); and
the value ( 100 ) of claim 1 which is arranged at least partially in the valve region ( 210 ) so that the valve closing body ( 110 ) can interact with volute connection opening ( 240 ) and the bypass opening ( 250 ).

8. The dual-volute turbine ( 200 ) of claim 7 , wherein the valve ( 100 ) is pivotable between a closed position to suppress flow of exhaust gases through the volute connection opening ( 240 ) and the bypass opening ( 250 ), and an opened position to allow flow of exhaust gases through the volute connection opening ( 240 ) and the bypass opening ( 250 ).

9. The dual-volute turbine ( 200 ) of claim 8 , wherein the main body ( 111 ) is substantially bowl shaped and the collar ( 112 ) forms a rim of the main body ( 111 ) and defines the valve axis ( 114 ), wherein an outer contour of the main body ( 111 ) defines a volute connection sealing surface ( 111 a ) for sealing volute connecting opening ( 240 ), and wherein the collar ( 112 ) defines the bypass sealing surface ( 112 a ) for sealing the bypass opening ( 250 ), wherein in the closed position the main body ( 111 ) extends through the bypass opening ( 250 ) and such that the volute connection sealing surface ( 111 a ) interacts with a volute connection valve seat ( 242 ) defined by the volute connection opening ( 240 ) in the divider wall ( 234 ) to suppress flow of exhaust gases between the volutes ( 236 , 238 ) through the volute connection opening ( 240 ).

10. The turbine ( 200 ) of claim 7 , wherein the pivoting axis ( 133 ) lies in a plane defined by the bypass sealing surface ( 112 a ).

11. The dual-volute turbine ( 200 ) of claim 7 , wherein the main body ( 111 ) is substantially bowl shaped and the collar ( 112 ) forms a rim of the main body ( 111 ) and defines a valve axis ( 114 ), wherein an outer contour of the main body ( 111 ) defines a volute connection sealing surface ( 111 a ) for sealing volute connecting opening ( 240 ), and wherein the collar ( 112 ) defines a bypass sealing surface ( 112 a ) for sealing the bypass opening ( 250 ), wherein the outer contour of the main body ( 111 ) and a contour of the volute connection opening ( 240 ) are shaped substantially complementary to each other.

12. The dual-volute turbine ( 200 ) of claim 7 , wherein the main body ( 111 ) is substantially bowl shaped and the collar ( 112 ) forms a rim of the main body ( 111 ) and defines a valve axis ( 114 ), wherein an outer contour of the main body ( 111 ) defines a volute connection sealing surface ( 111 a ) for sealing volute connecting opening ( 240 ), wherein the valve ( 100 ) is operable such that the bypass sealing surface ( 112 a ) sealingly engages with a bypass valve seat ( 252 ) located around the bypass opening ( 250 ).

13. An exhaust gas turbocharger for an internal combustion engine or a fuel cell comprising:
a compressor with a compressor wheel and a compressor housing,
the turbine ( 200 ) of claim 10 , and
a bearing housing with a shaft supported therein, wherein the turbine wheel and the compressor wheel are rotationally coupled via the shaft.

14. The valve ( 100 ) of claim 1 , wherein an outer contour of the main body ( 111 ) defines a volute connection sealing surface ( 111 a ) for sealing volute connecting opening ( 240 ), and wherein the collar ( 112 ) defines a bypass sealing surface ( 112 a ) for sealing the bypass opening ( 250 ).

15. The valve ( 100 ) of claim 1 , wherein the pivoting axis ( 133 ) lies in a plane defined by the bypass sealing surface ( 112 a ).

Assignees

• Borgwarner Inc

Inventors

• Injac Ivan

Classifications

• F02B37/22

  by varying cross-section of exhaust passages or air passages {, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits} (F02B37/24 takes precedence) · CPC title

• F02B37/025

  Multiple scrolls or multiple gas passages guiding the gas to the pump drive · CPC title

• F02B37/183 Primary

  Arrangements of bypass valves or actuators therefor · CPC title