| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake manifold capable of reducing the noise, weight and manufacturing costs. SOLUTION: An intake air lead-in part 20 made of a resin has a semicircular intake pipe 21 and eight connection parts 22, 23, 24, 25, 26, 27, 28, 29 by arranging four each side of the intake pipe 21. The intake pipe 21 is formed with a communication hole 21a at a central part in the axial direction, and the intake air is distributed to each connection part through the communication hole 21a. An intake air distribution part 40 made of aluminum has a semicircular intake pipe 41. Branch pipes 42, 44, 46, 48 and branch pipes 43, 45, 47, 49 are arranged each other in both sides of the intake pipe 41 opposite to the air flow. A flange plate 50 for connecting the branch pipes 42, 44, 46, 48 and a flange plate 51 for connecting the branch pipes 43, 45, 47, 49 are fixed to an intake port of an engine by fastening bolts. The intake air distribution part 40 covers the intake air lead-in part 20 on the side opposite to an engine.
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