摘要 |
PROBLEM TO BE SOLVED: To provide an intake device reducing intake sound during engine low speed rotation, while securing sufficient suction air volume during engine high speed rotation, with a simple structure without requiring an actuator. SOLUTION: A main duct 3 and a bypass duct are connected in parallel to the upstream side in the intake direction of an air cleaner, and an opening-closing type valve 6 is arranged in the main duct 3. A flap 7 of the valve 6 still maintains a closing state of its passage 3a since there is a slope projection part 11 while being rotationally displaced up to an initial displacement position P2 in the opening direction in the engine low speed rotation. During the engine high speed rotation, the flap 7 of the valve 6 is further rotationally displaced, and opens the passage 3a of the main duct 3 large at once, and allows the intake air inflow to the air cleaner together with the bypass duct. COPYRIGHT: (C)2010,JPO&INPIT
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