| 摘要 |
PROBLEM TO BE SOLVED: To enhance supercharging efficiency by preventing the temperature of air supercharged by a compressor from increasing. SOLUTION: A water jacket 5 is provided inside the sidewall portion of a compressor housing 1 that encompasses an impeller 2. Coolant is introduced through a coolant inlet port 6, circulated through the sidewall portion that surrounds the impeller 2 of the compressor housing 1, and exhausted from a coolant exhaust port 7. When the impeller 2 of the compressor housing 1 compresses and discharges air, a coolant passage surrounding the impeller 2 cools the air, thereby preventing the temperature of the air from increasing, as a result of supercharging. This enhances supercharging efficiency of a turbocharger, enables the turbocharger to be built compact thanks to a reduced capacity of an intercooler involved, and improves engine output performance.
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