Adaptive muffler based on controlled flow valves | Zendy

Peter Šteblaj | Zendy; Mirko Čudina | Zendy; P. Lipar | Zendy; Jurij Prezelj | Zendy

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Adaptive muffler based on controlled flow valves

Author(s) -

Peter Šteblaj,

Mirko Čudina,

P. Lipar,

Jurij Prezelj

Publication year - 2015

Publication title -

the journal of the acoustical society of america

Language(s) - Uncategorized

Resource type - Journals

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4921682

Subject(s) - muffler , acoustics , noise control , expansion chamber , flexibility (engineering) , noise (video) , resonator , helmholtz resonator , range (aeronautics) , transmission loss , flow (mathematics) , computer science , materials science , noise reduction , physics , mechanics , mathematics , statistics , composite material , artificial intelligence , image (mathematics) , optoelectronics

An adaptive muffler with a flexible internal structure is considered. Flexibility is achieved using controlled flow valves. The proposed adaptive muffler is able to adapt to changes in engine operating conditions. It consists of a Helmholtz resonator, expansion chamber, and quarter wavelength resonator. Different combinations of the control valves' states at different operating conditions define the main working principle. To control the valve's position, an active noise control approach was used. With the proposed muffler, the transmission loss can be increased by more than 10 dB in the selected frequency range.

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