Speed sensor insert with bearing spacer indexing for a turbocharger

Patent metadata

Field	Value
Publication number	US-9745997-B2
Application number	US-201615143994-A
Country	US
Kind code	B2
Filing date	May 2, 2016
Priority date	Aug 17, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A number of variations may include a turbocharger bearing housing comprising a bearing bore, a rolling element bearing assembly including an inner race and an outer race having a plurality of ball bearings disposed therebetween, wherein the rolling element bearing assembly is disposed within the bearing bore, a shaft for rotating the rolling element bearing assembly, located and supported within the inner race, a tubular bearing spacer, having at least one radial opening, positioned within the bearing bore, a mounting bore, a generally tubular insert mounted in the mounting bore and extending into the at least one radial opening of the tubular bearing spacer, and a rotational speed sensor mounted to the tubular insert via threaded fitting or friction fit.

First claim

What is claimed is:

1. A turbocharger bearing housing, including
a bearing bore,
a rolling element bearing assembly including an inner race and an outer race having a plurality of ball bearings disposed therebetween, wherein the rolling element bearing assembly is disposed within the bearing bore,
a shaft for rotating the rolling element bearing assembly, located and supported within the inner race,
a tubular bearing spacer, having at least one radial opening, positioned within the bearing bore,
a mounting bore,
a generally tubular insert mounted in the mounting bore and extending into the at least one radial opening in the tubular bearing spacer, and
a rotational speed sensor mounted to the tubular insert via threaded fitting or friction fit.

2. The turbocharger as in claim 1 , wherein the generally tubular insert is mounted in the mounting bore by a screw fit, a friction fit, a pressed fit or by bonding, staking, or welding.

3. The turbocharger as in claim 1 , wherein the tubular insert and speed sensor are provided with indexing features for setting the depth of penetration of the speed sensor.

4. The turbocharger as in claim 1 , wherein the insert has internal threading and external threading.

5. The turbocharger as in claim 1 , wherein the bearing housing has an outer surface, the tubular insert includes a segment projecting outwards beyond the outer surface of the bearing housing, and wherein said projecting segment includes features for engagement of said insert for rotation.

6. The turbocharger as in claim 5 , wherein said features for engagement of said insert for rotation comprise one or more flat surfaces.

7. The turbocharger as in claim 6 , wherein said flat surfaces form a hexagon.

8. The turbocharger of claim 1 , wherein said outer race includes an outer race window wherein a first axial end of the tubular insert is disposed within said outer race window thereby maintaining the outer race in alignment with an axis of the rotational speed sensor.

Assignees

• Borgwarner Inc

Inventors

• Chekansky Jason W

Classifications

• F04D29/4206 Primary

  especially adapted for elastic fluid pumps · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F01D17/06 Primary

  responsive to speed · CPC title

• F02B2037/122

  Control of rotational speed of the pump · CPC title

• F02B37/22

  by varying cross-section of exhaust passages or air passages {, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits} (F02B37/24 takes precedence) · CPC title