| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that in order to reduce radiation heat from a turbine housing of a supercharger, the turbine housing is conventionally water-cooled or covered with a heat shielding material, but heat loss of exhaust gas used for driving an exhaust turbine increases so that a turbine efficiency deteriorates and in long-time driving of the supercharger, the outer surface of the heat shielding plate has high temperature due to thermal conduction and the radiation heat to surroundings of the supercharger increases. SOLUTION: In the supercharger 2 equipped with a turbine wheel 35 which rotates with exhaust gas from an engine 1, a cooling structure 47 comprising an inner thermal insulation portion of an air layer 45 and an outer low temperature portion of a turbine cover 39 is provided on the periphery of the turbine housing 40 for housing the turbine wheel 35. COPYRIGHT: (C)2010,JPO&INPIT |
