Patent ID: 8419350

Claim:
An exhaust-gas turbocharger for an internal combustion engine, comprising: a shaft, a turbine wheel and a compressor wheel, wherein the shaft supports the turbine wheel and the compressor wheel and the shaft further includes, a housing, a bearing region of the shaft, comprising a bearing device, a bearing-housing section and a bearing-shaft section, a hub of the shaft, wherein the hub is positioned on an exhaust-gas side between the bearing region of the shaft and the turbine wheel, at least one groove in the hub, at least one sealing ring positioned in the groove of the hub for sealing the shaft; wherein the shaft further includes an oil throwing groove between the groove and the bearing-shaft section and at least one annular bead in the region of the oil throwing groove, wherein the at least one annular bead is arranged such that an annular gap is bordered thereby; a radial hub step configured in the hub of the shaft between the groove and the turbine wheel, and a hub-housing section enclosing the hub, wherein a radial housing step is configured, which communicates with the radial hub step such that the radial hub step in conjunction with the radial housing step forms a heat shield for at least one sealing ring to provide protection from hot exhaust gases.