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A turbine housing for a supercharger, includes an inlet opening, a turbine seat and a race extending from the inlet opening to the turbine seat, the race including a first spiral chamber (7) which mouth into the turbine seat and a second spiral chamber (8) which mouth into the turbine seat. Both the

A turbine housing for a supercharger, includes an inlet opening, a turbine seat and a race extending from the inlet opening to the turbine seat, the race including a first spiral chamber (7) which mouth into the turbine seat and a second spiral chamber (8) which mouth into the turbine seat. Both the first spiral chamber (7) and the second spiral chamber (8) mouth in a first angular segment (β) of the turbine seat, the axial height of the mouth into the turbine seat of the second spiral chamber (8) in the first angular segment (β) is bigger in the end of the first angular segment (β) than in the beginning thereof seen in a flow direction (F), and in that the A/R-ratio of the first spiral chamber (7) is smaller than the common A/R-ratio of the first spiral chamber (7) and the second spiral chamber (8).

대표청구항 ▼

1. A turbine housing for a supercharger, comprising: an inlet opening (2), a turbine seat (5) and a race (6) extending from said inlet opening (2) to said turbine seat (5),said race (6) comprising a first spiral chamber (7) which mouth into said turbine seat (5) and a second spiral chamber (8) which

1. A turbine housing for a supercharger, comprising: an inlet opening (2), a turbine seat (5) and a race (6) extending from said inlet opening (2) to said turbine seat (5),said race (6) comprising a first spiral chamber (7) which mouth into said turbine seat (5) and a second spiral chamber (8) which mouth into said turbine seat (5),wherein the first spiral chamber (7) and the second spiral chamber (8) mouth into said turbine seat in parallel with each other in a first angular segment (β) of the turbine seat (5) and along an entire length of said first angular segment (β), the axial height of the mouth into the turbine seat (5) of the second spiral chamber (8) in said first angular segment (β) being bigger in the end of the first angular segment (β) than in the beginning thereof seen in a flow direction (F), andwherein the A/R-ratio of the first spiral chamber (7) is smaller than the common A/R-ratio of the race when the first spiral chamber (7) and the second spiral chamber (8) are considered as having one common cross sectional area. 2. The turbine housing according to claim 1, wherein the second spiral chamber (8) comprises a maneuverable flow regulator (11). 3. The turbine housing according to claim 1, wherein the first spiral chamber (7) comprises a maneuverable flow regulator. 4. The turbine housing according to claim 1, wherein an outer determining surface (13) of the second spiral chamber (8) is arranged outside an outer determining surface (14) of the first spiral chamber (7) seen in the radial direction. 5. The turbine housing according to claim 1, wherein the second spiral chamber (8) presents a larger cross sectional area than the first spiral chamber (7) in each radial cross section of the race (6). 6. The turbine housing according to claim 1, wherein only the first spiral chamber (7) mouth in a second angular segment (α) of the turbine seat (5), which second angular segment (α) is arranged downstream and adjacent an inlet (10) of the turbine housing (1) seen in the flow direction (F). 7. The turbine housing according to claim 6, wherein both the first spiral chamber (7) and the second spiral chamber (8) mouth in the first angular segment (β) of the turbine seat (5), which first angular segment (β) is arranged downstream and adjacent said second angular segment (α) seen in the flow direction (F). 8. The turbine housing according to claim 1, wherein the axial height of the mouth into the turbine seat (5) of the second spiral chamber (8) in the first angular segment (β) is increasing in the direction of said flow direction (F). 9. The turbine housing according to claim 1, wherein axial height of the mouth into the turbine seat (5) of the first spiral chamber (7) in the first angular segment (β) is smaller in the end of the first angular segment (β) than in the beginning thereof seen in said flow direction (F). 10. The turbine housing according to claim 9, wherein axial height of the mouth into the turbine seat (5) of the first spiral chamber (7) in the first angular segment (β) is decreasing in the direction of said flow direction (F). 11. The turbine housing according to claim 6, wherein said second angular segment (α) of the turbine seat (5) is bigger than 40 degrees, preferably bigger than 80 degrees. 12. The turbine housing according to claim 6, wherein said first angular segment (β) and said second angular segment (α) of the turbine seat (5) together is bigger than 300 degrees, preferably bigger than 340 degrees. 13. The turbine housing according to claim 6, wherein the first spiral chamber (7) and the second spiral chamber (8) are separated from each other by means of a wall (9) having a principally axial extension in parallel with the flow direction in said second angular segment (α). 14. A supercharger for a combustion engine, characterized in that it comprises a turbine housing according to claim 1. 15. The turbine housing according to claim 2 wherein the first spiral chamber (7) comprises a maneuverable flow regulator. 16. The turbine housing according to claim 2, wherein an outer determining surface (13) of the second spiral chamber (8) is arranged outside an outer determining surface (14) of the first spiral chamber (7) seen in the radial direction. 17. The turbine housing according to claim 2, wherein the second spiral chamber (8) presents a larger cross sectional area than the first spiral chamber (7) in each radial cross section of the race (6). 18. The turbine housing according to claim 2 wherein only the first spiral chamber (7) mouth in a second angular segment (α) of the turbine seat (5), which second angular segment (α) is arranged downstream and adjacent an inlet (10) of the turbine housing (1) seen in the flow direction (F). 19. The turbine housing according to claim 2, wherein the axial height of the mouth into the turbine seat (5) of the second spiral chamber (8) in the first angular segment (β) is increasing in the direction of said flow direction (F). 20. The turbine housing according to claim 2, wherein axial height of the mouth into the turbine seat (5) of the first spiral chamber (7) in the first angular segment (β) is smaller in the end of the first angular segment (β) than in the beginning thereof seen in said flow direction (F).