동력기계공학회지 (Journal of Power System Engineering)
- 제9권3호
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- Pages.26-32
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- 2005
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- 2713-8429(pISSN)
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- 2713-8437(eISSN)
가변 헬름홀츠 공진기가 다기통 디젤기관의 체적효율에 미치는 영향
The Effects of Tunable Helmholtz Resonators on the Volumetric Efficiency in a Multi-cylinder Diesel Engine
초록
The volumetric efficiency is significantly affected by the behavior of pressure wave in induction system and exhaust pipe. By the motion of the piston, there exist pressure fluctuation in induction system which produce waves. Waves are propagated along a pipe bi-directional as they propagated through it, making compression wave and rare-faction(expansion) wave. These wave phenomena can affect to the volumetric efficiency. As a method of improvement of the volumetric efficiency, fuel economy and pollutant emission reduction particularly in low engine speeds, a side-branch additional tunable helmholtz resonator on the secondary pipe of intake system is proposed by use of their acoustic vibrations. Some of results are presented which deal with their physical phenomena for the wave action of intake system in a four-stroke three cylinders diesel engine.
키워드