Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2006.11a
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- Pages.649-653
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- 2006
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- 1598-2548(pISSN)
The Study of the improvement of the sound quality using the target profile of combustion pressure
목적 연소압 형상을 이용한 음질 개선에 관한 연구
Abstract
Engine Noise is composed of the mechanical and combustion noise. The contribution of combustion noise is generally bigger than the contribution of the mechanical noise at idle condition in DI diesel engine. That noise usually makes a roughness problem at the fundamental engine order. It is difficult to remove the modulation frequency so we have to directly reduce the combustion noise. The key effect of combustion noise reducing solution is the modification of the combustion pressure profile. It is accomplished by the multiple injection method and we solved the 400Hz combustion noise and improved the sound quality at idle condition in DI diesel engine.
Keywords
- Mechanical Noise;
- Combustion Noise;
- Target Combustion Pressure Profile(TCPP);
- Peak Firing Pressure(PFP);
- Multiple Injection;
- Roughness;
- Fluctuation Strength