| 摘要 |
PURPOSE: An exhaust device for improving the output of an engine is provided to maximize the engine output by properly controlling the exhaust noise and back pressure characteristics via a valve selectively opening a second tail pipe. CONSTITUTION: A first tail pipe(2) and a second tail pipe(3) are separately formed in an exhaust pipe(1). A valve(4) for selectively opening the second tail pipe depending on the intensity of the traveling wind is formed on the lower end of the exhaust pipe. A valve body(5) of the valve blocks the inlet of the second tail pipe by entering the exhaust pipe. An operating rod(6) is hinge-coupled to the exhaust pipe. A fan-shaped closing part(9) is formed to connect the valve body with an isolating plate(10). A spring(7) is installed between the operating rod and the bottom face of the exhaust pipe to make the valve body block the inlet of the second tail pipe.
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