| 摘要 |
In a supercharger ( 10 ) with an electric motor in accordance with the present invention, the electric motor ( 20 ) is arranged at a position adjacent to a compressor impeller ( 6 ), a center housing ( 14 ) has a cooling fluid flow path ( 34 ) formed in such a manner as to surround the electric motor ( 20 ) and be adjacent to a diffuser portion ( 25 ). A first cooling structure portion ( 38 ) is formed at a position in the electric motor ( 20 ) side in the cooling fluid flow path ( 34 ), a second cooling structure portion ( 39 ) is formed at a position in the diffuser portion ( 25 ) side in the cooling fluid flow path ( 34 ). The electric motor ( 20 ) is cooled by the first cooling structure portion ( 38 ). The diffuser portion ( 25 ) is cooled by the second cooling structure portion ( 39 ).
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