Wastegate subassembly for a turbocharger

Patent metadata

Field	Value
Publication number	US-2016169090-A1
Application number	US-201514955104-A
Country	US
Kind code	A1
Filing date	Dec 1, 2015
Priority date	Dec 10, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A turbocharger turbine ( 2 ) includes a wastegate subassembly ( 50 ) that includes a mounting plate ( 51 ) having a bore ( 55 ) therethrough, a valve shaft ( 60 ) disposed in the bore ( 55 ), and a wastegate valve ( 30 ) including a valve body ( 31 ) and a valve arm ( 36 ) that secures the valve body ( 31 ) to an end of the valve shaft ( 60 ). The wastegate subassembly ( 50 ) is preassembled prior to assembly with the turbocharger ( 1 ), and is detachably secured to an outer surface of the turbine exhaust gas inlet ( 10 ) such that valve body ( 31 ) is positioned to control exhaust gas flow through a bypass port ( 13 ) that extends between the exhaust gas inlet ( 10 ) and an exhaust gas outlet ( 12 ), and bypasses the turbine wheel ( 16 ).

First claim

What is claimed, is:

1 . A wastegate subassembly ( 50 ) comprising
a mounting plate ( 51 ) comprising a mounting surface ( 52 ), an outer surface ( 53 ) that is opposed to the mounting surface ( 52 ) and a bore ( 55 ) that opens at both the mounting surface ( 52 ) and the outer surface ( 53 ), a valve shaft ( 60 ) disposed in the bore ( 55 ) such that a first end ( 61 ) of the valve shaft ( 60 ) resides outside the bore ( 55 ) on a mounting surface-side ( 52 ) of the mounting plate ( 51 ), and a second end ( 62 ) of the valve shaft ( 60 ) resides outside the bore ( 55 ) on an outer surface-side ( 53 ) of the mounting plate ( 51 ); and a wastegate valve ( 30 ) including a valve body ( 31 ) and a valve arm ( 36 ) that secures the valve body ( 31 ) to the first end ( 61 ) of the valve shaft ( 60 ); wherein the mounting plate ( 51 ) is configured to be selectively connected to and detached from a turbocharger ( 1 ) housing.

2 . The wastegate subassembly ( 50 ) of claim 1 , wherein the mounting plate ( 51 ) is planar, has a rectangular peripheral shape, and includes bolt openings ( 56 ) configured to receive a fastener that secures the mounting plate ( 51 ) to a housing of a turbocharger turbine ( 2 ).

3 . The wastegate subassembly ( 50 ) of claim 1 , wherein the valve body ( 31 ) comprises a planar valve face ( 32 ), and protruding stem ( 33 ) on a side opposed to the valve face ( 32 ).

4 . The wastegate subassembly ( 50 ) of claim 1 , wherein the valve arm ( 36 ) comprises a plate portion ( 37 ) that is connected to the valve body ( 31 ), and a hollow cylindrical portion ( 40 ) disposed at one end ( 37 ) of the plate portion ( 37 ), the cylindrical portion ( 40 ) configured to receive the valve shaft ( 60 ) therein and disposed at one end ( 37 ) of the plate portion ( 37 ) such that a longitudinal axis ( 43 ) of the cylindrical portion ( 40 ) is parallel to a broad surface ( 39 ) of the plate portion ( 37 ).

5 . The wastegate subassembly ( 50 ) of claim 4 , wherein
the plate portion ( 37 ) includes a plate through opening ( 38 ) that receives a portion of the valve body ( 31 ), the cylindrical portion ( 40 ) includes a first open end ( 44 ), a second open end ( 45 ), and a central opening ( 46 ) disposed between the first open end ( 44 ) and the second open end ( 45 ), and the plate through opening ( 38 ) is axially offset relative to the central opening ( 46 ).

6 . The wastegate subassembly ( 50 ) of claim 1 , comprising a bushing ( 68 ) disposed in the bore ( 55 ), the bushing ( 68 ) configured to support the valve shaft ( 60 ) for rotation within the bore ( 55 ).

7 . The wastegate subassembly of claim 1 , comprising a link arm ( 70 ) fixed to the second end ( 62 ) of the valve shaft ( 60 ), the link arm ( 70 ) configured to connect the valve shaft ( 60 ) to an actuator ( 29 ).

8 . A turbocharger ( 1 ) comprising
a turbine housing ( 8 ) defining an exhaust gas inlet ( 10 ), an exhaust gas outlet ( 12 ) and a volute ( 14 ) that connects the exhaust gas inlet ( 10 ) to the exhaust gas outlet ( 12 ), a turbine wheel ( 16 ) disposed in the exhaust gas inlet ( 10 ) between the volute ( 14 ) and the exhaust gas outlet ( 12 ), a bypass port ( 13 ) is formed in the exhaust gas inlet ( 10 ) that communicates with the exhaust gas outlet ( 12 ) and bypasses the turbine wheel ( 16 ), a second port ( 17 ) formed in the exhaust gas inlet ( 10 ) in the vicinity of the bypass port ( 13 ), and a wastegate subassembly ( 50 ) comprising
a mounting plate ( 51 ) comprising a mounting surface ( 52 ), an outer surface ( 53 ) that is opposed to the mounting surface ( 52 ) and a bore ( 55 ) that opens at both the mounting surface ( 52 ) and the outer surface ( 53 ),
a valve shaft ( 60 ) disposed in the bore ( 55 ) such that a first end ( 61 ) of the valve shaft ( 60 ) resides outside the bore ( 55 ) on a mounting surface-side ( 52 ) of the mounting plate ( 51 ), and a second end ( 62 ) of the valve shaft ( 60 ) resides outside the bore ( 55 ) on an outer surface-side ( 53 ) of the mounting plate ( 51 ); and
a wastegate valve ( 30 ) including a valve body ( 31 ) and a valve arm ( 36 ) that secures the valve body ( 31 ) to the first end ( 61 ) of the valve shaft ( 60 ),
wherein the mounting plate ( 51 ) is detachably secured to an outer surface of the exhaust gas inlet ( 10 ) such that the mounting plate ( 51 ) closes the second port ( 17 ) and the valve body ( 31 ) is positioned to control exhaust gas flow through the bypass port ( 13 ).

9 . The turbocharger ( 1 ) of claim 8 , wherein the turbine housing ( 8 ) is formed of a first material, and the mounting plate ( 51 ) is formed of a second material, wherein the second material different from the first material.

10 . The turbocharger ( 1 ) of claim 8 , comprising a bushing ( 68 ) disposed in the bore ( 55 ), the bushing ( 68 ) configured to support the valve shaft ( 60 ) for rotation within the bore ( 55 ).

11 . The turbocharger ( 1 ) of claim 8 , comprising a link arm ( 70 ) fixed to the second end ( 62 ) of the valve shaft ( 60 ), the link arm ( 70 ) configured to connect the valve shaft ( 60 ) to an actuator ( 29 ).

12 . The turbocharger ( 1 ) of claim 8 , wherein the mounting plate ( 51 ) is planar, has a rectangular peripheral shape, and includes bolt openings ( 56 ) configured to receive a fastener ( 57 ) that secures the mounting plate ( 51 ) to a housing of a turbocharger turbine ( 2 ).

13 . The turbocharger ( 1 ) of claim 8 , wherein the valve arm ( 36 ) comprises a plate portion ( 37 ) that is connected to the valve body ( 31 ), and a hollow cylindrical portion ( 40 ) disposed at one end ( 37 ) of the plate portion ( 37 ), the cylindrical portion ( 40 ) configured to receive the valve shaft ( 60 ) therein and disposed at one end ( 37 ) of the plate portion ( 37 ) such that a longitudinal axis ( 43 ) of the cylindrical portion ( 40 ) is parallel to a broad surface ( 39 ) of the plate portion ( 37 ).

14 . The turbocharger ( 1 ) of claim 13 , wherein
the plate portion ( 37 ) includes a plate through opening ( 38 ) that is fixed to a portion of the valve body ( 31 ), the cylindrical portion ( 40 ) includes a first open end ( 44 ), a second open end ( 45 ), and a central opening ( 46 ) disposed between the first open end ( 44 ) and the second open end ( 45 ), the plate through opening ( 38 ) is axially offset relative to the central opening ( 46 ).

15 . A method of assembling a wastegate valve ( 30 ) with an exhaust gas inlet ( 10 ) of a turbocharger turbine ( 2 ) such that the wastegate valve ( 30 ) controls the flow of exhaust gas through a bypass port ( 13 ) formed in the exhaust gas inlet ( 10 ), the method comprising
providing a pre-assembled wastegate subassembly ( 50 ) that includes
a mounting plate ( 51 ) comprising a mounting surface ( 52 ), an outer surface ( 53 ) that is opposed to the mounting surface ( 52 ) and a bore ( 55 ) that opens at both the mounting surface ( 52 ) and the outer surface ( 53 ),
a valve shaft ( 60 ) disposed in the bore ( 55 ) such that a first end ( 61 ) of the valve shaft ( 60 ) resides outside the bore ( 55 ) on a mounting surface-side ( 52 ) of the mounting plate ( 51 ), and a second end ( 62 ) of the valve shaft ( 60 ) resides outside the bore ( 55 ) on an outer surface-side ( 53 ) of the mounting plate ( 51 ); and
a wastegate valve ( 30 ) including a valve body ( 31 ) and a valve arm ( 36 ) that secures the valve body ( 31 ) to the first end ( 61 ) of the valve shaft ( 60 );
inserting the first end ( 61 ) of the valve shaft ( 60 ) through a second port ( 17 ) formed in the exhaust gas inlet ( 10 )

Assignees

• Borgwarner Inc

Inventors

• Murphy Michael
• Chandramohanan Rajmohan

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02B37/183 Primary

  Arrangements of bypass valves or actuators therefor · CPC title

• F02B37/186

  Arrangements of actuators or linkage for bypass valves · CPC title