Patent ID: 8684678

Claim:
An exhaust gas turbocharger, comprising: a turbine rotor rotatably mounted in a housing, which is associated with a guide apparatus forming a radial inlet channel, wherein the turbine rotor drives a medium in the channel, wherein the guide apparatus comprises a guide vane bearing ring, a plurality of guide vanes radially surrounding the turbine rotor and located in the inlet channel and a guide vane cover ring, wherein the inlet channel is axially delimited by the guide vane bearing ring and the guide vane cover ring, wherein the guide vane bearing ring and the guide vane cover ring are mounted axially and radially moveably relative to each other and to the housing for material relaxation, and wherein the guide apparatus is subjected to axial and radial preload, and wherein a line of flux of the axial preload runs through the guide apparatus substantially parallel to the rotational axis of the turbine rotor.