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US 2010/0135785 A1Published application
Exhaust-gas turbocharger for an internal combustion engine
AssigneeBosch Mahle Turbo Systems GmbH & Co. KG
InventorMichael Just
Life of this patent
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Abstract
The invention relates to an exhaust-gas turbocharger (1) for an internal combustion engine, in particular of a motor vehicle. The exhaust-gas side sacrificial sealing ring that serves as a heat shield is replaced by a step (20, 21) formed in the housing (4) and in the hub (9), said step serving to assume the function of a heat shield instead of the sacrificial sealing ring. By means of this design feature, the production costs are reduced by the outlay for the sacrificial sealing ring.
Claims20
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,
- 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,
- 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.
5 more elements
Dependencies are inferred from the claim text.