| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake manifold device with a passage length change-over part via which the length of an intake passage is quickly and smoothly changed over. SOLUTION: The passage length change-over part 18 for freely changing over the length of the intake passage 16 as part of an intake manifold 14 has a shaft 42 to be turned under the driving operation of a driving part, and a plurality of first-fourth valves 36a-36d held by the shaft 42. On the first-fourth valves 36a-36d, first and second valve ribs 54, 56 are provided which can be connected to each other. First and second shaft ribs 58, 60 are provided between each of the second and third valves 36b, 36c and the shaft 42. COPYRIGHT: (C)2009,JPO&INPIT
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