Turbocharger turbine housing

1. A turbocharger turbine housing comprising:

a base that defines a turbine wheel opening that comprises an axis that defines an axial direction;

an exhaust inlet flange that defines an exhaust inlet;

an exhaust outlet flange that defines an exhaust outlet;

a wastegate shaft bore, a wastegate passage, a wastegate opening for the wastegate passage and a wastegate seat disposed about the wastegate opening;

bosses wherein each of the bosses defines a coolant opening;

a spiral coolant passage in fluid communication with at least two of the coolant openings wherein the spiral coolant passage comprises at least two 360 degree windings with respect to an axial dimension of the turbocharger turbine housing; and

at least one coolant passage that intersects at least two of the at least two 360 degree windings of the spiral coolant passage to be in fluid communication with the at least two of the at least two 360 degree windings of the spiral coolant passage.

2. The turbocharger turbine housing of claim 1 wherein the at least one coolant passage that is in fluid communication with at least two of the at least two 360 degree windings of the spiral coolant passage comprises a coolant passage that is radially offset from the axis and that extends a length in the axial direction.

3. The turbocharger turbine housing of claim 1 wherein the at least one coolant passage that is in fluid communication with at least two of the at least two 360 degree windings of the spiral coolant passage comprises a coolant passage that is in fluid communication with at least three 360 degree windings of the spiral coolant passage.

4. The turbocharger turbine housing of claim 1 wherein the spiral coolant passage comprises at least three 360 degree windings.

5. The turbocharger turbine housing of claim 1 wherein the spiral coolant passage comprises four 360 degree windings.

6. The turbocharger turbine housing of claim 1 wherein the wastegate shaft bore is at least partially disposed between two of the 360 degree windings of the spiral coolant passage.

7. The turbocharger turbine housing of claim 6 wherein one of the two 360 degree windings is a closest winding to the exhaust outlet.

8. The turbocharger turbine housing of claim 1 wherein the bosses comprise three bosses wherein each of the three bosses defines a respective coolant opening.

9. The turbocharger turbine housing of claim 8 wherein one of the three coolant openings of the three bosses is sealed and the other two of the coolant openings of the three bosses comprise a coolant inlet and a coolant outlet.

10. The turbocharger turbine housing of claim 1 wherein the at least one coolant passage comprises at least one axial coolant passage that intersects at least two of the at least two 360 degree windings of the spiral coolant passage.

11. A method of cooling a turbocharger turbine housing, the method comprising:

in the turbocharger turbine housing, that comprises a base that defines a turbine wheel opening that comprises an axis that defines an axial direction; an exhaust inlet flange that defines an exhaust inlet; an exhaust outlet flange that defines an exhaust outlet; a wastegate shaft bore, a wastegate passage, a wastegate opening for the wastegate passage and a wastegate seat disposed about the wastegate opening; bosses wherein each of the bosses defines a coolant opening; a spiral coolant passage in fluid communication with at least two of the coolant openings wherein the spiral coolant passage comprises at least two 360 degree windings with respect to an axial dimension of the turbocharger turbine housing; and at least one coolant passage that intersects at least two of the at least two 360 degree windings of the spiral coolant passage to be in fluid communication with the at least two of the at least two 360 degree windings of the spiral coolant passage, flowing coolant to the spiral coolant passage; and

flowing at least a portion of the coolant in an axial direction from one of the at least two 360 degree windings to another one of the at least two 360 degree windings via at least one of the at least one coolant passage that is in fluid communication with at least two of the at least two 360 degree windings of the spiral coolant passage.

12. The method of claim 11 further comprising flowing air in an axial direction in at least one of the at least one coolant passage.

13. The method of claim 11 further comprising sealing one of three openings of the spiral coolant passage and using the two unsealed openings as the coolant openings that comprise a coolant inlet and a coolant outlet.

14. The method of claim 11 wherein flowing coolant to the spiral coolant passage comprises flowing coolant in two of the at least two 360 degree windings wherein the wastegate shaft bore is at least partially disposed between the two 360 degree windings.

15. A turbocharger turbine housing comprising:

a base that defines a turbine wheel opening that comprises an axis that defines an axial direction;

an exhaust inlet flange that defines an exhaust inlet;

an exhaust outlet flange that defines an exhaust outlet;

a wastegate shaft bore, a wastegate passage, a wastegate opening for the wastegate passage and a wastegate seat disposed about the wastegate opening;

bosses wherein each of the bosses defines a coolant opening;

a spiral coolant passage in fluid communication with at least two of the coolant openings wherein the spiral coolant passage comprises at least two windings with respect to an axial dimension of the turbocharger turbine housing; and

at least one coolant passage that is in fluid communication with at least two of the at least two windings of the spiral coolant passage,

wherein the spiral coolant passage comprises four windings.