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A Study of a Dual Mode Muffler
Technical Paper
2003-01-1647
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Dual mode mufflers are extensively used in Japan, the construction involves a valve to control the exhaust gas flow. The exhaust gas passes through a small pipe at low engine speed, and a larger pipe at higher engine speed. This has the effect of a large noise reduction at low engine speed, and lower back pressure at high engine speed. This paper clarifies the resonator effect of the dual mode muffler that depends on the valve opening angle and rate of exhaust gas flow, and detailed relationship between the valve opening angle and noise reduction, how the exhaust gas flow is the major influence for the noise reduction of the dual mode muffler.
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Citation
Liu, B., Maeno, M., Hase, S., and Wakamatsu, S., "A Study of a Dual Mode Muffler," SAE Technical Paper 2003-01-1647, 2003, https://doi.org/10.4271/2003-01-1647.Also In
References
- Hirata Y. Itow T. The Journal of the Acoustic Society of Japan 26 1 16 24 1970
- Hirata Y. The Journal of the Acoustic Society of Japan 27 10 501 507 1971