| 摘要 |
PROBLEM TO BE SOLVED: To determine conditions for obtaining high performance as an intercooler when supercharging pressure gets higher than pressure in current situation or a material is changed to improve performance. SOLUTION: In this intercooler provided with a tube 10 forming a flow passage in which intake air of an internal combustion engine flows in the inside and an inner fin 11 for dividing the flow passage in the tube 10 into a plurality of thin flow passages 100, the optimum specifications of a core of the intercooler are obtained using de/(S/Swa) as parameter when cross sectional area in one tube 10 is S, total flow passage area of the thin flow passages 100 in one tube 10 is Swa, and diameter of circle equivalent to one thin flow passage 100 is de (unit:mm). For example, in a case of an intercooler in which an inner fin 11 is a straight fin and supercharging pressure is 200 kPa or more, de/(S/Swa) is set to 0.2 to 7.5 to obtain the intercooler having high performance. COPYRIGHT: (C)2006,JPO&NCIPI
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