VARIABLE TURBINE/COMPRESSOR GEOMETRY

摘要

A variable turbine/compressor geometry for an exhaust gas turbocharger of an internal combustion engine includes a blade bearing ring having guide blades rotatably mounted therein and a cover disc which is arranged on the face end of the guide blades. At least one gas guide channel may run through at least one guide blade. The gas guide channel including, adjacent to a profile lug, a least one inlet opening, and on at least one of a face end directed towards the cover disc and a bottom side directed towards the blade bearing ring includes an outlet opening. The gas guide channel may be configured to generate a friction-reducing air cushion during operation on at least one of the face end and the bottom side.