Turbocharger housing and bearing locating pin
View Patent ↗A turbocharger assembly includes: a housing with a through-bore and a cross-bore that intersects the through-bore to define an upper portion of the cross-bore with a first diameter and a lower portion of the cross-bore with a second diameter where the first diameter exceeds the second diameter; a bearing disposed in the through-bore of the housing where the bearing includes a through-bore configured to support a shaft and a cross-bore that intersects the through-bore; and a locating pin with a diameter that exceeds the second diameter of the lower portion of the cross-bore of the housing, the locating pin press-fit at least partially into the lower portion of the cross-bore of the housing and disposed at least partially in the lower portion of the cross-bore of the bearing to locate the bearing in the through-bore of the housing. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.
1. A turbocharger assembly comprising:
a housing that comprises a housing through-bore and a housing cross-bore that intersects the housing through-bore to define an upper portion of the housing cross-bore that comprises a first diameter and a lower portion of the housing cross-bore that comprises a second diameter wherein the first diameter exceeds the second diameter;
a bearing disposed in the housing through-bore of the housing wherein the bearing comprises a bearing through-bore configured to support a shaft and a bearing cross-bore that intersects the bearing through-bore; and
a locating pin that comprises a diameter that exceeds the second diameter of the lower portion of the housing cross-bore, the locating pin press-fit at least partially into the lower portion of the housing cross-bore and disposed at least partially in the lower portion of the bearing cross-bore to locate the bearing in the housing through-bore.
2. The turbocharger assembly of claim 1 wherein the upper portion of the housing cross-bore comprises a lubricant passage.
3. The turbocharger assembly of claim 1 wherein the locating pin comprises a press-fit scarred portion press-fit into the lower portion of the housing cross-bore and an unscarred locating portion disposed at least partially in the lower portion of the bearing cross-bore to locate the bearing in the housing through-bore.
4. The turbocharger assembly of claim 3 wherein the press-fit scarred portion comprises press-fit scars from a press-fit of the locating pin into the lower portion of the housing cross-bore.
5. The turbocharger assembly of claim 1 wherein a diameter of the lower portion of the bearing cross-bore exceeds the diameter of the locating pin.
6. The turbocharger assembly of claim 1 wherein the housing comprises a lubricant inlet configured to communicate lubricant to the upper portion of the housing cross-bore and a lubricant drain configured to provide access to the lower portion of the housing cross-bore.
7. The turbocharger assembly of claim 1 wherein an axis of the housing cross-bore, an axis of the bearing cross-bore and an axis of the locating pin substantially align.
8. The turbocharger assembly of claim 7 wherein the axis of the bearing cross-bore intersects an axis of the housing through-bore.
9. The turbocharger assembly of claim 1 wherein the bearing comprises a semi-floating bearing.
10. The turbocharger assembly of claim 9 wherein the locating pin provides clearance that allows for movement of the semi-floating bearing responsive to squeeze film damper dynamics.
11. A method comprising:
positioning a bearing in a through-bore of a turbocharger housing to align a cross-bore of the bearing and a cross-bore of the turbocharger housing wherein the cross-bore of the turbocharger housing intersects the through-bore and the turbocharger housing and comprises a large diameter portion on one side of the through-bore and a small diameter portion on an opposing side of the through-bore;
placing a locating pin in the large diameter portion of the cross-bore of the turbocharger housing; and
press-fitting a portion of the locating pin into the small diameter portion of the cross-bore of the turbocharger housing.
12. The method of claim 11 wherein the positioning comprises inserting a plunger into the cross-bore of the turbocharger housing and into the cross-bore of the bearing.
13. The method of claim 12 wherein the positioning comprises inserting the plunger via the small diameter portion of the cross-bore of the turbocharger housing.
14. The method of claim 11 wherein the press-fitting comprises disposing a shaft into the large diameter portion of the cross-bore of the turbocharger housing, contacting the locating pin and the shaft and applying force to the shaft to press-fit the locating pin into the small diameter portion of the cross-bore of the turbocharger housing.
15. The method of claim 11 wherein the press-fitting comprises imparting press-fit scars to only a portion of the locating pin.
16. The method of claim 11 further comprising terminating the press-fitting in response to an increase in force with respect to displacement of the locating pin.
17. A method comprising:
positioning a bearing in a through-bore of a turbocharger housing to align a cross-bore of the bearing and a cross-bore of the turbocharger housing wherein the cross-bore of the turbocharger housing intersects the through-bore and comprises a large diameter portion on one side of the through-bore and a small diameter portion on an opposing side of the through-bore;
placing a locating pin in the large diameter portion of the cross-bore of the turbocharger housing; and
press-fitting a portion of the locating pin into the small diameter portion of the cross-bore of the turbocharger housing.
wherein the positioning comprises inserting a plunger into the cross-bore of the turbocharger housing and into the cross-bore of the bearing and wherein the positioning comprises inserting the plunger via the small diameter portion of the cross-bore of the turbocharger housing.
18. The method of claim 17 wherein the inserting the plunger via the small diameter portion of the cross-bore of the turbocharger housing comprises inserting an end of the plunger into a lubricant drain of the turbocharger housing for accessing an opening of the small diameter portion of the cross-bore of the turbocharger housing and for inserting the end of the plunger therein.