| 摘要 |
An exhaust apparatus for an engine booming noise reduction vehicle is provided to reduce engine exhaust booming noise because a muffler is set up just behind catalyst and another two mufflers are additionally installed. An exhaust apparatus for an engine booming noise reduction vehicle comprises as follows. In an exhaust pipe(1) which is connected to the engine and is connected to outside, a catalytic converter(2), a front muffler(10), a center muffler(20) and a main muffler(30) are successively installed from the engine. As to the front muffler, a case(12) in which a filler(13) consisting of grease wool is equipped surrounds the exhaust pipe and the exhaust gas flowing in through the exhaust pipe passes through an in-tube(14), a connecting tube(16) and an outer pipe(18) and an exhaust gas flowing direction change, a resonance, sound-absorption and interference/expansion are caused. The sound energy of the exhaust gas is transformed to the heat energy and oscillation ventilation booming noise of the engine is reduced.
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