| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbine housing enabling cooling performance required for a cooling system to be lowered. ! SOLUTION: A housing body 40 of a turbine housing 31 is formed of aluminum alloy, and has a groove 41 in the inner face, shaped to extend over the whole periphery of a turbine wheel and to be recessed in the direction of a rotary shaft L1 of the wheel. An inner wall member 50 is formed of stainless steel, and has a body part 51 formed into a cylindrical shape, and a folded part 52 provided at one end of the body part 51 and shaped to be folded to the outer diameter side. The inner wall member 50 is provided in the housing body 40 in such a form that the front end of the folded part 52 is fitted into the groove 41. At a low temperature, an inner face 55 of the folded part 52 comes in close contact with a face 45 on the inner diameter side of the groove 41 and a clearance is formed between an outer face 54 of the folded part 52 and a face 46 on the outer diameter side of the groove 41 |
