| 摘要 |
An intercooler comprises: tubes 10 in which the suction air of an internal combustion engine flows; and inner fins 11 for dividing passages in the tubes into a plurality of minute passages 100, wherein the intercooler is characterized in that when a cross sectional area in one tube 10 is S, a total passage area of the minute passages 100 in one tube 10 is Swa and an equivalent circle diameter of one minute passage 100 is de (unit: mm), the most appropriate specification of the core of the intercooler is found when de/(S/Swa) is used as a parameter. For example, in the case of an intercooler in which the inner fins 11 are straight fins and the supercharging air pressure is not less than 200 kPa, when de/(S/Swa) is made to be 0.2 to 7.5, it is possible to provide an intercooler with high performance.
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