| 摘要 |
PROBLEM TO BE SOLVED: To provide the intake passage structure of a motorcycle to perform separation of a foreign matter in air through simple structure. SOLUTION: In a motorcycle wherein an intake port is formed in a cowling to cover the front part of a car body and the intake port and an air cleaner are intercoupled through an intake passage 11, a surge tank 12 is arranged in the middle of the intake passage 11 and the intake passage 11 is divided into an intake air introduction passage 13 situated upstream therefrom and an intake discharge passage 14 situated downstream therefrom. Meanwhile, an air intake port 16 is formed in the outer peripheral surface of the surge tank 12, and by connecting it to the air intake port 16 in a state that the intake air introduction passage 13 is offset from the central axis of the surge tank 12, air introduced in the surge tank 12 generates a swirl flow. Further, an air output port 17 is formed in the central part of the upper surface of the surge tank 12, and an intake air discharge passage 14 is inserted in the air output port 17. |
