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한일현(Ilhyun Han),박희경(Heekyeong Park),권대용(Daeyong Kwon),류도영(Doyong Ryu) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
So far, we were considered the noise control of 4 cylinder gasoline engine from a two different standpoint. The first, we should reduce the sound pressure level of the exhaust tail pipe noise, the second, should make the timber of tail pipe noise soft when the interior occupants and somebody in exterior listen the noise. But the exhaust noise was comprised of the engine firing 2<SUP>nd</SUP> order and its harmonics, the half order which was occurred by not being the same length of the exhaust manifold and the exhaust pipe acoustic which was made by the pipe length and the diameter. Because of above stated reasons, the noise made a higher level, a kind of shock and harsh in the exhaust tail pipe, so we were difficult to tune the noise. Therefore, the study analyzed the cause of the exhaust tail pipe noise characteristic and understood the all noise control characteristic of exhaust component. After this, we were able to control the exhaust component to get the low noise level and soft when somebody listen the noise as a proper arrangement of the exhaust component.
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