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Idle Sound Quality Development for Diesel V6 Engine
Technical Paper
2011-01-1563
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A comprehensive investigation was carried out in order to
develop the idle sound quality for diesel V6 engine when the engine
development process is applied to power-train system, which
included new 8-speed automatic transmission for breaking down the
noise contribution between the mechanical excitation and the
combustion excitation. First of all, the improvement of dynamic
characteristic can be achieved during the early stages of the
engine development process using experimental modal analysis (EMA)
& the robust design of each engine functional system. In
addition, the engine structural attenuation (SA) is enhanced such
that the radiated combustion noise of the engine can be maintained
at a target level even with an increased combustion excitation. It
was found that the engine system has better parts and worse parts
in frequency range throughout the SA analysis. It is important that
weak points in the system should be optimized. In this study, the
chain cover was adopted by using the passive constrained layer
damping treatments (PCLDT) for the front side of 2~3 kHz range and
the 3rd generation common rail system with piezoelectric injector
that has a maximum injection pressure of 180 MPa was applied by
using the forming cover and controlling of charging
time/discharging time. Additionally, in order to reach the Euro5
standard for this engine, it is also important to adopt the low
emission combustion concept with new injection strategy. However,
this kind of combustion mode can give high frequency in roughness
noise and worse stability in idle condition related to modulation
noise. So the control of the pilot & post injection for
reducing and optimizing combustion excitation in the chambers
should be optimized. Therefore it has been shown that the engine
development process gives the best results with respect to interior
sound quality as well as to the engine radiating noise. Moreover
the emotional quality of interior sound for passenger vehicle has
been guaranteed.
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Authors
Citation
Lee, K., Nam, C., KIm, H., Yoo, D. et al., "Idle Sound Quality Development for Diesel V6 Engine," SAE Technical Paper 2011-01-1563, 2011, https://doi.org/10.4271/2011-01-1563.Also In
References
- Hirano, I. Kondo, M. Uraki, Y. Asafara, Y. “Using Mutiple Regression Analysis to Estimate The Contributions of Engine-Radiated Noise Components” JSAE Review 20 1999 363 368 1999
- Kasseris, E. Heywood, J. “Comparative Analysis of Automotive Powertrain Choices for the Next 25 Years,” SAE Technical Paper 2007-01-1605 2007 10.4271/2007-01-1605
- Nashif, A. D. “Vibration Damping” John Wiley & Sons, Inc. New York 0471867721 1985
- Lee, K.H. “Application of Viscoelastic Damping for Passive Vibration Control in Automotive Roof using Equivalent Properties,” Int. J. Automobile Technology 6 6 607 613 2005
- Koo, T.K. “Sound Quality Development for Passenger Vehicle,” INTERNOISE 2010 PORTUGAL June 13 16 2010
- Wang, S. Chalu, C. Duclaux, N. Paquien, M. “Noise Optimization of Diesel Engines with New Combustion Systems,” SAE Int. J. Passeng. Cars - Mech. Syst. 2 1 1387 1395 2009 10.4271/2009-01-2081