| 摘要 |
PURPOSE:To prevent the excessive inertial supercharge by allowing each suction pipe of a cylinder group free from mutual interference of intake to communicate to resonance boxes and connecting a resonance pipe communicating to a tank to the resonance box and restricting a movable partitioning member movable by the pressure in the box installed into the resonance box, according to the operation condition. CONSTITUTION:The suction pipe 9 of a cylinder group free from mutual interference communicates to resonance boxes 2 and 3, which communicate to a damping tank 7 through resonance pipes 4 and 5. Two partitioning plates 13 are installed between the resonance boxes 2 and 3, and the both partitioning plates are connected by a connecting rod 14 through a cam 15. In ordinary operation of an engine, the both partitioning plates 13 are connected and fixed, and resonance supercharge is carried-out. When the generation of knocking by the excessive air supply is estimated, according to the engine revolution and load, the transfer of the partitioning plate 13 through the revolution of the cam 15 is permitted, and since the partitioning plate is transferred when the pressure in the resonance box increases, the excessive pressure rise can be prevented.
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