| 摘要 |
PROBLEM TO BE SOLVED: To compactify an intake controller provided with a cylindrical rotary valve functioning as a surge tank by arranging a sectioning plate extending in the axial direction in the rotary valve so as to divide the inside of the rotary valve into a surge tank and a spatial volume chamber. SOLUTION: Intake passage inlets 15A, 25A are formed in an internal cylinder 14 inserted and fixed in a large diameter cylindrical part 2 of an external cylinder 1, in which a branch pipe 13 provided with an intake passage outlet 5 is integrally formed, and the inlet 15A is passed through the upstream end of an intake passage 35, which is surrounded by the external cylinder 1 and the internal cylinder 14 and formed so as to surround the outer circumference of a cylindrical part 15 in the internal cylinder 14, while the inlet 25A is communicated with the downstream side of the intake passage 35. A rotary valve 39, in which a sectioning plate 46 dividing the inside of the rotary valve 39 into a surge tank 47 and a spatial volume chamber 48 is arranged, is inserted into the internal cylinder 14 rotationally, and when an engine is rotated at high speed, the rotary valve 39 is rotated from the low speed position in the counterclockwise direction and an opening 65A is communicated with the inlet 25A, and as a result, length of the intake passage 35 is shortened.
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