Valve assembly for a dual volute turbocharger and dual volute turbocharger including the same

Patent metadata

Field	Value
Publication number	US-11408333-B2
Application number	US-202016788927-A
Country	US
Kind code	B2
Filing date	Feb 12, 2020
Priority date	Feb 15, 2019
Publication date	Aug 9, 2022
Grant date	Aug 9, 2022

Abstract

A valve assembly for controlling exhaust gas flow to a turbine housing interior of a dual volute turbocharger includes a first valve member, a valve shaft, and a second valve member. The first valve member is disposed about and extends along an axis between a first end and a second end and is movable between a first, a second, and a third position for controlling exhaust gas flow to the turbine housing interior. The first valve member defines a valve interior between the first and second ends. The valve shaft is partially disposed in the valve interior and is coupled to the first end of the first valve member. The second valve member has a base coupled to and disposed about the valve shaft and a projection extending from the base and about the shaft into the valve interior. The second valve member is movable between closed and open positions.

First claim

What is claimed is:

1. A dual volute turbocharger for receiving exhaust gas from an internal combustion engine and for delivering compressed air to the internal combustion engine, said dual volute turbocharger comprising:
a turbine housing comprising,
an interior surface defining,
a turbine housing interior adapted to receive a turbine wheel,
a first volute adapted for fluid communication with the internal combustion engine and said turbine housing interior for delivering exhaust gas from the internal combustion engine to said turbine housing interior,
a second volute adapted for fluid communication with the internal combustion engine and said turbine housing interior for delivering exhaust gas from the internal combustion engine to said turbine housing interior, and
a turbine housing outlet in fluid communication with said turbine housing interior for discharging exhaust gas from said turbine housing interior,

a wall separating said first volute from said second volute, and
a valve seat, wherein said wall and said valve seat collectively define a valve cavity; and

a valve assembly for controlling exhaust gas flow from said first volute and said second volute to said turbine housing interior, said valve assembly comprising,
a first valve member engageable with said wall of said turbine housing and disposed about and extending along an axis between a first end adapted to be proximal said wall of said turbine housing and a second end spaced from said first end and adapted to be distal said wall of said turbine housing, with said first valve member defining a valve interior between said first end and said second end, and with said first valve member movable between a first position where said first valve member is disposed in said valve cavity and adjacent said wall of said turbine housing for restricting exhaust gas from flowing between said first volute and said second volute, a second position where said first valve member is disposed in said valve cavity and spaced from said wall of said turbine housing for allowing exhaust gas to flow between said first volute and said second volute, and a third position where said first valve member is disposed outside of said valve cavity for allowing exhaust gas from said first volute and said second volute to bypass said turbine housing interior,
a valve shaft partially disposed in said valve interior and coupled to and extending from said first end of said first valve member for moving said first valve member between said first position, said second position, and said third position,
a second valve member engageable with said valve seat and having a base coupled to and disposed about said valve shaft and a projection extending from said base and about said valve shaft into said valve interior, with said second valve member movable between a closed position where said base is engaged with said valve seat of said turbine housing for restricting exhaust gas from said first volute and said second volute from bypassing said turbine housing interior, and an open position where said base is disengaged with said valve seat of said turbine housing for allowing exhaust gas from said first volute and said second volute to bypass said turbine housing interior, and
a biasing member disposed in said valve interior and about said valve shaft, with said biasing member configured to bias said first valve member into one of said first position and said second position when said second valve member is in said closed position.

2. The dual volute turbocharger as set forth in claim 1 , wherein said biasing member is chosen from a cupped spring, a curved spring, a wave spring, and a coil spring.

3. The dual volute turbocharger as set forth in claim 1 , wherein said biasing member is configured to bias said first valve member into said second position when second valve member is in said closed position.

4. The dual volute turbocharger as set forth in claim 1 , wherein said biasing member is disposed about said projection of said second valve member.

5. The dual volute turbocharger as set forth in claim 4 , wherein said second valve member further comprises a lip extending radially from said projection with respect to said axis.

6. The dual volute turbocharger as set forth in claim 5 , wherein said biasing member is disposed between and in contact with said lip of said second valve member and said second end of said first valve member.

7. The dual volute turbocharger as set forth in claim 6 , wherein said biasing member is configured to bias said first valve member into said second position when said second valve member is in said closed position.

8. The dual volute turbocharger as set forth in claim 1 , wherein said first valve member has an outer contour that is cup-shaped.

9. A valve assembly for controlling exhaust gas flow to a turbine housing interior of a dual volute turbocharger, said valve assembly comprising:
a first valve member disposed about and extending along an axis between a first end and a second end spaced from said first end, with said first valve member defining a valve interior between said first end and said second end, and with said first valve member movable between a first position, a second position, and a third position for controlling exhaust gas flow to the turbine housing interior of the dual volute turbocharger;
a valve shaft partially disposed in said valve interior and coupled to and extending from said first end of said first valve member, with said valve shaft extending along said axis from said first end of said first valve member for moving said first valve member between said first position, said second position, and said third position;
a second valve member having a base coupled to and disposed about said valve shaft and a projection extending from said base and about said valve shaft into said valve interior, with said second valve member movable between a closed position and an open position for controlling exhaust gas flow to the turbine housing interior of the dual volute turbocharger; and
a biasing member disposed in said valve interior and about said valve shaft, with said biasing member configured to bias said first valve member into one of said first position and second position when said second valve member is in said closed position;
wherein said biasing member is disposed about said projection of said second valve member, and
wherein said second valve member further comprises a lip extending radially from said projection with respect to said axis.

10. The valve assembly as set forth in claim 9 , wherein said biasing member is chosen from a cupped spring, a curved spring, a wave spring, and a coil spring.

11. The valve assembly as set forth in claim 9 , wherein said biasing member is disposed between and in contact with said lip of said second valve member and said second end of said first valve member.

12. The valve assembly as set forth in claim 9 , wherein said first valve member has an outer contour that is cup-shaped.

13. A dual volute turbocharger for receiving exhaust gas from an internal combustion engine and for delivering compressed air to the internal combustion engine, said dual volute turbocharger comprising:
a turbine housing comprising,
an interior surface defining,
a turbine housing interior adapted to receive a turbine wheel,
a first volute adapted for fluid communication with the internal combustion engine and said turbine housing interior for delivering exhaust gas from the internal combustion engine to said turbine housing interior,
a second volute adapted for fluid communication with the internal combustion engine and said turbine housing interior for de

Assignees

• Borgwarner Inc

Inventors

• Cola Michael Daniel

Classifications

• F01D17/143

  the shiftable member being a wall, or part thereof of a radial diffuser · CPC title

• F01D9/026

  Scrolls for radial machines or engines · CPC title

• F05D2270/3015

  differential pressure · CPC title

• F02B37/025 Primary

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

• F05D2270/66

  Mechanical actuators (F05D2270/62 takes precedence) · CPC title