Borgwarner Inc.

Forschungszentrum Julich Gmbh

Jens-Wolf Jaisle

Patric Hoecker

Stefan Münz

Robert Lingenauber

Arno Forster

John K Fremerey

Matthias Lang

Berthold Engels

The invention relates to an exhaust gas turbocharger () having a housing and having a shaft () which is arranged so as to be capable of rotating about its longitudinal axis in the housing and on which a turbine wheel () and a compressor wheel () are seated and which is guided in radial bearings () which are embodied as magnetic bearings and in at least one axial bearing (), the bearings () each having a bearing plate () which is seated on the shaft () and at least one stator () which lies axially opposite said axial bearing () on at least one side, forming a gap. In order to cool the bearings, it is proposed according to the invention that at least one flow duct (), via which at least one bearing gap can have an air stream applied to it, is formed in the housing.

Turbocharger with air-cooled magnetic bearing system

The invention concerns an exhaust gas turbocharger () having a shaft () on which a turbine wheel () and a compressor wheel () sit and which is guided in radial bearings () and in at least one axial bearing (), which is characterized in that the radial bearings () are embodied as passive magnetic bearings having permanent magnets (through) generating axial magnetic fluxes; and the axial bearing () is embodied as an active magnetic bearing having an electromagnet (), an axial sensor, and a controller for controlling the electrical current impinging upon the electromagnet ().

Exhaust gas turbocharger

A charged internal combustion engine () having at least one stage of charging by a turbocharger (), in which at least one supplemental compressor () is connected parallel to or in series with the turbocharger, and in which the supplemental compressor () has a drive independent from the working medium cycle of the internal combustion engine.

Charged internal combustion engine

A charged internal combustion engine () having at least one stage of charging by a turbocharger (), in which at least one supplemental compressor () is connected parallel to or in series with the turbocharger, in which the supplemental compressor () has a drive independent form the working medium cycle of the internal combustion engine.

The invention relates to an exhaust gas turbocharger () having a housing and having a shaft () which is arranged so as to be capable of rotating about its longitudinal axis in the housing and on which a turbine wheel () and a compressor wheel () are seated and which is guided in radial bearings () and in at least one axial bearing (), the radial bearings () being embodied as passive, permanent-magnetic bearings which each have a bearing plate () which is seated on the shaft () as a rotor, and at least one stator () which is disposed axially opposite to said rotor. In order to achieve a radial oscillation damping of the shaft () in a simple manner, it is proposed according to the invention that a resilient element () is disposed between the stator () and a part () which is fixed to the housing.

Turbocharger with magnetic bearing system that includes dampers

An exhaust gas-driven turbocharger ( ) exhibits an adjustable radial turbine ( ) which powers a compressor ( ) by way of a common shaft ( ), whereby a turbine housing ( ) designed with a multiplicity of scrolls surround the turbine wheel ( ) and exhibits at least two afflux ports ( ) annularly encompassing the turbine wheel ( ), whose outlets ( ) at least partly surround the wheel approach ( ) of the turbine wheel ( ) and which are at an axial distance from one another. An annular, axially displaceable coupler ( ) is provided for opening and closing the outlet ( ) of at least one afflux port ( ), so that the boost pressure of the turbine can be influenced thereby.

Growing community of inventors

Heidelberg, Germany

Jens-Wolf Jaisle