| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake device for an internal combustion engine capable of inexpensively preventing a collision sound between a rotary valve and a bore part, regardless of deformation of the rotary valve for switching an air supply form of the internal combustion engine. SOLUTION: When the rotary valve having a plurality of valve parts 11 for respectively separately opening and closing a supply switching port 7 of a plurality of air supply passages of an intake manifold becomes a closing state, an inner surface part 77b of a ladder fitting recessed part is positioned on the opposite side of the supply switching port existing side to a ladder engaging part 64. In a central side valve part 11b except for an end side valve part positioned in both end parts of the rotary valve, a seal interval A between the inner surface part 77b and the ladder engaging part 64, becomes smaller than a valve interval C between the central side valve part 11b and the bore part 8. COPYRIGHT: (C)2008,JPO&INPIT
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