| 摘要 |
PURPOSE:To improve a distribution characteristic of fuel, by forming a plurality of passage to be divided on the bottom surface of an intake passage part introducing a mixture in a direction distant from an engine in accordance with a number of passages in the side of a fuel supplying means, in the case of an engine equipping an intake manifold of U turn type. CONSTITUTION:An intake manifold 1, setting a twin carburetor onto a mounting flange 2, has a primary side and a secondary side port 3, 4. The intake manifold 1 in the downstream side of these ports 3, 4 has an intake passage part 8, comprising a riser part 6 and a communication path 7 extending in a horizontal direction, and a branch part 10, in which a branch passage 9a, 9b collects in the upstream end, while the branch passage 9a, 9b, branching from the branch part 10 and performing a U turn, is connected with each intake port of an engine 5. Here an intake passage device, providing a partition 21 in the intake passage part 8 in a plane containing its center line C8, thus forms a primary side passage 22 and a secondary side passage 23 to be divided in the intake passage part 8. |
