Borgwarner Inc.

Michael Fischer

Frank Scherrer

Sean Rylance

Robert Lingenauber

Josef-Hans Hemer

James Finley

Rob Daniels

Martin Bihy

An exhaust-gas turbocharger () having a compressor housing (); a turbine housing (); and a bearing housing () which has a compressor-side flange () and which has a turbine-housing-side flange (). The turbine-housing-side flange () is produced from a material which corresponds in terms of its mechanical and thermal properties to the material of the turbine housing ().

Exhaust-gas turbocharger

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.

Turbocharger bearing housing with cast-in pipes

Growing community of inventors

Kirchheimbolanden, Germany

Michael Fischer