Investigation on a Semi-Active Silencing Device for the Exhaust Noise
This paper, according to the principle of the Hershcel-Quincke tube, presents a semi-active silencing device which can effectively control the fundamental frequency exhaust noise of the internal combustion engine. This device can choose the proper pipeline by using the valves to achieve semi-active control of low-frequency noise of the internal combustion engine. Taking the 4102BG-type diesel engine as the research object, we designed a bypass duct silencer to control its fundamental frequency exhaust noise, and then simulation and steady-state control performance testing also have been done. The results show that the bypass duct silencer can get 6~20dB reduction of the fundamental frequency exhaust noise in the steady-state operating conditions, and the total SPL has also decreased.
C. C. Yin et al., "Investigation on a Semi-Active Silencing Device for the Exhaust Noise", Advanced Materials Research, Vols. 317-319, pp. 2249-2253, 2011