| 摘要 |
PURPOSE:To improve the charging efficiency by installing a valve into a communication passage for allowing a supercharge port to communicate to a natural intake passage and opening the valve for a prescribed time before the opening of a supercharge passage. CONSTITUTION:A communication passage 27 for allowing a supercharge port 15 to communicate to a natural intake passage 1 is formed, and a valve 28 is installed into the communication passage 27. The valve 28 is opened for a prescribed time before the opening of the supercharge passage by a timing valve 26. Therefore, the natural intake is supplied also from the supercharge port 15, and the charging efficiency can be improved.
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