Turbocharger bearing housing with cast-in pipes
AssigneeBorgWarner Inc.
InventorsMichael Fischer, Martin Bihy, Sean Rylance, Rob Daniels, James Finley
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Abstract
Conventionally, turbocharger bearing housings are cast, and then oil passageways are drilled or bored into the casting. As a result, bores are limited to straight lines extending from drill access points. Greater design flexibility is provided by pre-staging in a mold a collection of metal pipes which will define one or more of oil, air and water galleries, and then casting a bearing housing around the pipes. This provides almost unlimited freedom in shaping and locating the oil bores and other features.
Claims17
A method of manufacturing a turbocharger bearing housing, the method comprising:
- preparing a pipe bundle (71, 74, 77, 78) including at least a first pipe directly supplying a turbine-end journal bearing and at least a second pipe directly supplying a compressor-end journal bearing, and
- casting the bearing housing (60) around the pipe bundle to form a bearing housing within which said first and second pipes are encased and respectively positioned for supplying said turbine-end journal bearing and compressor-end journal bearing.
A turbocharger bearing housing comprising:
- a pipe bundle (71, 74, 77, 78) made of a first metal and including at least a first pipe directly supplying a turbine-end journal bearing and at least a second pipe directly supplying a compressor-end journal bearing, and
- a bearing housing structure (60) comprised of a second metal cast around the pipe bundle to form a bearing housing within which said first and second pipes are encased and respectively positioned for supplying said turbine-end journal bearing and compressor-end journal bearing.
A method of manufacturing a turbocharger bearing housing, the method comprising:
- preparing a pipe bundle (71, 74, 77, 78) including at least a first metal pipe directly supplying a turbine-end journal bearing and at least a second metal pipe directly supplying a compressor-end journal bearing, and
- casting the bearing housing (60) around the pipe bundle to form a bearing housing within which said first and second metal pipes are encased and respectively positioned for supplying said turbine-end journal bearing and compressor-end journal bearing.
Dependencies are inferred from the claim text.