| 摘要 |
PROBLEM TO BE SOLVED: To relax variation of a negative pressure in a duct by opening/closing of a throttle and to relax pipe resonance of the duct in a motorcycle. SOLUTION: An air passage 26 is provided on a vehicle body frame 6 so as to be penetrated and the duct 71 for leading outside air introduced from an outside air introduction port 7a on a front side of the vehicle body frame 6 to the air passage 26 is provided in a longitudinal direction of the vehicle body. It has a hollow part 74a communicated with the duct 71 so as to have an opening 71c and the hollow part 74a is provided in a hollow part of a meter stay 74. In rapid opening of the throttle, by temporarily replenishing air of the hollow part 74a, variation of the negative pressure in the duct 71 by opening/closing of the throttle can be relaxed. A resonance chamber 84 is formed above the duct 71 and is communicated with a space in the duct 71 through a communication pipe 80. Thereby, pipe resonance of the duct 71 can be relaxed. COPYRIGHT: (C)2007,JPO&INPIT |
