| 摘要 |
A duct is provided for interconnecting separate stages of a compressor or a compressor and an intercooler of an internal combustion engine. The duct comprises a lumen for conveying compressed air and at least one channel for a cooling liquid, which channel at least partially surrounds the lumen and/or extends inside the lumen. The duct enables effective cooling of compressed air e.g. from 260 DEG C. to 220 DEG C. at a relatively low pressure drop, thus increasing service life of downstream equipment, in particular a downstream intercooler.
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