| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbocharger capable of preventing adhesion of deposit in a diffuser passage, and capable of inexpensively preventing damage of a compressor impeller.SOLUTION: A turbocharger 1 has a blow-by gas injection part 4 on at least one of a diffuser surface 222 of a compressor housing 2 and a confronting surface 311 of a bearing housing 3. The blow-by gas injection part 4 includes a surface forming part 41 having a large number of minute through holes opened to a diffuser passage 15 side, and a tank part 42 covered with the surface forming part 41 from the diffuser passage 15 side and to which a blow-by gas circulation passage 5 for circulating blow-by gas is connected. The blow-by gas in the tank part 42 through the blow-by gas circulation passage 5 is allowed to be injected to the diffuser passage 15 via the through holes due to ejector effect generated when compressed air passes through the diffuser passage 15.SELECTED DRAWING: Figure 1 |
