COOLING SYSTEM OF TURBOSUPERCHARGER

摘要

PROBLEM TO BE SOLVED: To provide a cooling system simply structured to cool a turbine house.

SOLUTION: Exhaust air from an internal combustion engine 13 is supplied to a turbine 12T of a high-pressure-stage turbosupercharger 12 via a first exhaust passage 14. An outlet port of the turbine 12T is coupled to an inlet port of a turbine 11T of a low-pressure-stage turbosupercharger 11 via a second exhaust passage 15. A third exhaust passage 16 is couple to the outlet port of the turbine 12T. A cooling passage 24 is provided which makes the second and third exhaust passages 15, 16 communicate with each other. A route of the cooling passage 24 is allowed to go through a turbine housing of the turbine 12T to absorb heat of the turbine housing by means of exhaust air flowing from the second exhaust passage 15 to the third exhaust passage 16.

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