| 摘要 |
PURPOSE:To prevent exhaust gas, etc., from flowing back inside a car by providing a heavy bob, oscillated in association with a body when lateral acceleration is applied to it, and a nonreturn valve stopper which retains a nonreturn valve of an outlet exhaust port and blocks forcibly a passage. CONSTITUTION:An outlet 2 of a rear body has its exhaust port 6 provided inward with a nonreturn valve 8 which comprises a rubber holder 8a and a rubber plate 8d, freely oscillated by air flow running through a passage 4, so that the passage 4 is selectively open and close. Also, a side wall is provided with a heavy bob lever 12, freely oscillated around a pin 2f, and a heavy bob 12a. In such a constitution, when a car undertakes a lateral G, the heavy bob lever 12 is oscillated by the inertia of the heavy bob 12a counterclockwise around the pin 2f to oscillate and move clockwise a stopper 9 via links 11, 10, retaining and blocking the nonreturn valve 8 at a close position of the outlet 2. |
