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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Acoustic Valve Integration in Exhaust Line Systems
Author(s)
Dennis Boennen1, Olivier Poullard2, James Egan3 and Bo Yuan1
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DOI:10.17265/2159-5275/2018.03.005
Affiliation(s)
1. Faurecia Clean Mobility, Shanghai 201107, China
2. Faurecia Clean Mobility, Yongin, South Korea
3. Faurecia Clean Mobility, Columbus, Indiana, USA
ABSTRACT
In
recent years the demand for the acoustic performance of exhaust systems has
increased and will further increase in the future. The main drivers are new pass-by-noise regulation and new powertrain technologies paired with exhaust
muffler volume, weight and costs constraints. In the following paper several
application examples for Adaptive Valve™ (self-actuated in-pipe valve),
in-muffler valve and electric valve are shown and the related benefits on the
system performance are assessed. It is shown that implementing a valve into an
exhaust system has a significant influence on the NVH performance. The
resulting backpressure penalties can be minimized using the right
implementation strategy of the valves in the exhaust system. Hence the exhaust
system has to be specifically designed for the integration of a valve. All
three valve types have additional benefits to their standard application for
overall noise reduction and muffler volume reduction, which are analyzed. The
Adaptive Valve™, for example, is often used on cars with long pipe routing and
has the additional benefit of reducing pipe resonance in the system. Another
example, the electric valve, can be coupled
with vehicle communication networks and hence the flexibility in application is
significantly increased.
KEYWORDS
Exhaust, valve, system integration.
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