| 摘要 |
A turbocharger of the present invention is provided with a thermo-reducing means between the turbine housing and the bearing housing in order to reduce the heat transferred from the turbine housing to the bearing housing. The thermo-reducing means comprises a thermo-isolating means such as an annular member made of a low heat conductive material. Also, the annular member contacts with the wall of the turbine housing which has a high thermal resistance, so that the heat transferred from the turbine housing to the connecting portion is reduced. The thermo-reducing means also comprises a sensible heat reducing means which is composed of a layer made of a low conductive material, on the inner surface of the wall of the turbine housing, preventing the heat transferred from the exhaust gas to the wall, and a layer made of a high emissive material, on the outer surface of the wall of the turbine housing radiating out the heat effectively. The turbine housing of the sensible heat means has the lower heat capacity compared with that of the bearing housing to reduce the sensible heat of the turbine housing.
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