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Meeting Future Demands for Quieter Commercial Powertrain Systems
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 20, 1997 by SAE International in United States
Annotation ability available
Noise legislations and the increasing customer demands determine the NVH-development of modern commercial vehicles. In this paper suitable engineering approaches will be discussed.
In order to meet the very stringent legislative requirements of the EEC and some other countries refinement of all vehicle noise sources is required. Cost-effective solutions, however, can only be found with low-noise powertrains, thus being able to avoid excessive noise packages on the vehicle. There is increasing demand, because modular systems should be ready to power a variety of different trucks and busses and allow for easy servicability.
With this focus on powertrain noise, the paper discusses and outlines the technological developments required to achieve sufficient noise reduction which aims towards a 1m engine noise level of 93 dBA measured in an acoustic test cell under rated conditions.
This very tough target for future engines can only be achieved with low-noise design concepts, with special consideration of the diesel injection and combustion system and a perfectly optimized powertrain structure. Potentials, analysis methods and the application of advanced simulation techniques in combination with experimental development and fine-tuning will be described in this paper and can be demonstrated by case studies.
Clearly, future demands will also include competitive noise quality inside and outside the vehicle, not only in drive, but also in idle condition. The AVL Annoyance Index can be successfully applied to support the noise quality development.
CitationBeidl, C. and Rust, A., "Meeting Future Demands for Quieter Commercial Powertrain Systems," SAE Technical Paper 972042, 1997, https://doi.org/10.4271/972042.
- Leipold, F. and Bergmann, H.: Development Stages for Reducing Noise Emissions of the New OM 904 LA Commercial Vehicle Diesel Engine. AVL-Conference “Engine and Environment” '96, Graz, Sept. 1996.
- Albers, P. and Brandl, F.K.: Vehicle Noise Reduction Strategies. SOBRAC Congress, Santa Catarina, Brazil, April 1994.
- Fingerhut, H.-P.: From Research to Serial Manufacture: MAN SILENT Trucks - Present and Future Requirements. AVL-Conference “Engine and Environment”'96, Graz, Sept. 1996.
- Bergmann, H., Scherer, F. and Osterwald, H.: The Combustion Development of the New OM 904 LA Diesel Engine of Mercedes Benz Commercial Vehicles. MTZ Motortechnische Zeitschrift 57 (1996) 4, April 1996.
- Miyashita, N.: Strategy of Engine Noise Reduction for Trucks and Buses. AVL-Conference “Engine and Environment”'96, Graz, Sept. 1996.
- Moser, F.X., Spessert, B. and Haller,H.: Possibilities of Noise Reduction in Commercial and Industrial Diesel Engines. AVL-Conference “Engine and Environment”'96, Graz, Sept. 1996.
- Rust, A. and Brandl, F.: Indicating Technology as a Part of the Noise Analysis of Combustion Engines. First Darmstädter Indicating Symposium, Darmstadt, May 1994.
- Rainer, G.Ph.: Engine and Vehicle Acoustics - Currently Applied and Future Computational Methods. AVL-Conference “Engine and Environment”'96, Graz, Sept. 1996.
- Priebsch, H.H., Loibnegger, B. and Tzivanopoulos, G.: Application of an Elastohydrodynamic Calculation Method for the Analysis of Crank Train Bearings. ASME-ICE Spring Technical Conference, Marietta, OH, April 1995.
- Schittler, M., Heinrich, R. and Kerschbaum, W: The Mercedes-Benz 500 Series - a New Generation of V-Engines for Heavy-Duty Trucks. MTZ Motortechnische Zeitschrift 57 (1996) 9, Sept. 1996.
- Hussain, M., Gölles, J., Ronacher, A. and Schiffbänker, H,: Statistical Evaluation of an Annoyance Index for Engine Noise Recordings. SAE 911080, Traverse City, MI, May 1991.
- Schiffbänker, H., Brandl, F.K. and Thien, G.E.: Development and Application of an Evaluation Technique to Assess the Subjective Character of Engine Noise. SAE 911081, Traverse City, MI, May 1991.
- Beidl, C.V. and Stücklschwaiger, W.: Application of the AVL-Annoyance Index for Engine Noise Quality Development. EAA-European Acoustics Association, Antwerp, March 1996.
- Stücklschwaiger, W., Ronacher, A.: Optimisation of Vehicle Drive Train Vibrations Using Computation Techniques. IMechE C487/024, Birmingham, May 1994.