| 摘要 |
<p>PROBLEM TO BE SOLVED: To strongly cool a part facing a shroud surface 32 in a shroud part 24 to improve cooling efficiency.SOLUTION: A turbocharger includes: a turbine housing 12; and a turbine impeller 18 arranged in an exhaust gas passage 22 of the turbine housing 12. A cooling water channel 26 in which cooling water flows is formed in the turbine housing 12, and a shroud surface 32 is formed in the turbine impeller 18 at a position facing the turbine housing 12. A heating value absorbed by the cooling water flowing in the vicinity of the shroud surface 32, of the cooling water for cooling the turbine housing 12, is made larger than a heating value absorbed by the same amount of cooling water flowing in portions other than the vicinity of the shroud surface 32.</p> |
