| 摘要 |
<p>A motorcycle having an air intake housing (18) connected to an internal combustion engine (14). The air intake housing (18) includes an opening (26) and an emission door (66) positioned adjacent the opening (26). The emission door (66) is pivotally mounted over the opening (26) such that when the engine (14) is not running, the emission door (66) is biased by gravity to cover the opening (26), thereby preventing the escape of emissions. When the engine (14) is started, the vacuum created causes the emission door (66) to pivot and uncover the opening (26), thereby allowing air to pass through the opening (26) for use by the engine (14). <IMAGE></p> |
