| 摘要 |
PROBLEM TO BE SOLVED: To reduce a fluctuation in the air filling ratio among cylinders, without increasing intake resistance. SOLUTION: The fluctuation in the air filling ratio among the cylinders is avoided, by equalizing a speed of an air current in right-left branch parts of an intake manifold 1, by arranging a partition wall 6 continuously and smoothly twisted over a finish position from a bending starting position so that the inside of a pipe 2 is vertically divided into two parts with a surface orthogonal to the axis of the cylinder as a boundary in the bending finish position, while dividing the inside of the pipe 2 into two parts of a bending outer peripheral area and a bending inner peripheral area in the bending starting position on the inside of the intake pipe 2 forming a bending part at a part immediately prior to the intake manifold 1. COPYRIGHT: (C)2008,JPO&INPIT
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