| 摘要 |
An exhaust system is provided for internal combustion engines which relatively improves the performance of such engines. The system comprises a plurality of approximately equal length exhaust pipes which are operably flow connected to exhaust ports of the engine at one end thereof and to a collection chamber at an opposite end thereof. The system further includes discharge pipes which communicate between ambient atmosphere and the collection chamber. The exhaust pipes are grouped in sets such that each of the pipes in the set is generally axially aligned with one of the discharge pipes. The collection chamber has a cross-sectional area which is greater than the cross-sectional area of the exhaust pipes where they are attached thereto and converges to a smaller cross section at the opposite end thereof where the discharge pipes are attached thereto. The discharge pipes diverge away from the collection chamber and include a silencing device in the discharge ends thereof. The silencing devices include a deflection mechanism which diverts approximately one-half of the discharge gasses passing through the discharge pipes to an elongated pathway so as to travel further than the remaining gas flow before rejoining the remainder of the gas, such that vibrations within the two gas streams interfere with one another thereby reducing the noise level produced by the gas being expelled from the discharge pipes.
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