Abstract: An exhaust-driven turbocharger for a motor vehicle includes at least one of a variable turbine and a compressor geometry, a vane-mounting ring with guide vanes mounted rotatably thereon and a guide vane cage. The guide vane cage forms at least part of a flow duct and at the same time a mount for the vane-mounting ring. The guide vane cage is supported by spacer elements while creating an axial gap on a housing of the exhaust-driven turbocharger such that hot gas selectively flows behind the guide vane cage. Also, the guide vane cage is clamped between the turbine housing and the mounting housing of the exhaust-driven turbocharger without fixedly connecting the guide vane cage to either one of the two housings.

Abstract: The invention relates to an exhaust gas turbocharger (1) for a motor vehicle with a shaft (2) carrying a compressor wheel and a turbine wheel which is mounted in a bearing housing (3), wherein in the region of the mounting in the bearing housing (3) at least one shaft sealing ring (4) is provided which is held in a shaft-sided circumferential groove (5). It is substantial to the invention here that at least two axially adjacent shaft sealing rings (4, 4?) are provided which are held in corresponding shaft-sided circumferential grooves (5, 5?), that an outer diameter (D) of the shaft (2) surrounding the shaft-sided circumferential grooves (5, 5?) is different in size.

Abstract: The invention relates to an exhaust-driven turbocharger (1) for a motor vehicle, with a variable turbine and/or compressor geometry, a vane-mounting ring (8) with guide vanes (9) mounted rotatably thereon, a guide vane cage (10) which forms at least part of a flow duct (5) and at the same time a mount for the vane-mounting ring (8). Essential to the invention is that the guide vane cage (10) is supported by means of spacer elements (11) while creating an axial gap (12) on a housing (13) of the exhaust-driven turbocharger (1) in such a manner that hot gas can flow behind the guide vane cage (10).