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Methodology for Exhaust System Design Optimization for Light Weight Passenger Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 09, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
While designing the exhaust system of passenger car on one hand there is stringent emission regulations, packaging constraints, high NVH performance requirement. On the other hand with lightweight vehicle design there is tremendous pressure on weight reduction of exhaust system while keep the same NVH performance levels. Exhaust system consist of muffler, bellows, pipes and hangers. For muffler design both acoustic (transmission loss, pass-by noise, tail pipe noise etc.) and non-acoustic (backpressure) parameters needs to be considered.
In the current paper, methodology for muffler design optimization using 1D acoustic simulation software is presented. The baseline exhaust design consist of two mufflers; main muffler and post muffler. Simulation methodology is developed to optimize main muffler design in order to eliminate post muffler requirement while achieving the same performance of baseline exhaust design. For this purpose a DOE study is conducted by varying primary muffler internal pipe dimensions, baffle location, perforation etc. to achieve transmission loss (TL) and backpressure (BP) of the baseline design.
Based on simulation study a physical prototype is made for optimized exhaust design consisting of only main muffler (with modified design compared to baseline main muffler). Transmission loss and backpressure is measured physically and confirmed that the optimized exhaust design is able to deliver the same NVH performance as that of the baseline exhaust design. Furthermore, a vehicle level physical test is conducted to compare the pass-by noise for optimized exhaust design and compared with baseline exhaust design. It is observed that the optimized exhaust design with one muffler is able to maintain the same pass-by noise level as that of the baseline exhaust design with two mufflers.
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CitationMaurya, N., Sreekumaran, A., and Iqbal, S., "Methodology for Exhaust System Design Optimization for Light Weight Passenger Vehicles," SAE Technical Paper 2019-26-0269, 2019, https://doi.org/10.4271/2019-26-0269.
Data Sets - Support Documents
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- Eriksson , L.J. and Thawani , P.T. Theory & Practice in Exhaust System Design SAE Technical Paper 850989 1985 10.4271/850989
- Munjal , M.L. Acoustic of Ducts and Mufflers John Wiley & Sons 1987
- Komkin , I. Optimization of Reactive Mufflers Acoustical Physics 56 3 336 341 2010
- Lee , J.W. and Kim , Y.Y. Topology Optimization of Muffler Internal Partitions for Improving Acoustical Attenuation Performance John Wiley & Sons, Ltd 2012
- Shah , S. , Saisankaranarayana , K. , Hatti , K.S. , and Thombare , D.G. A Practical Approach towards Muffler Design, Development and Prototype Validation SAE Technical Paper 2010-32-0021 2010 10.4271/2010-32-0021
- Chinna Rao , P. , Madhava Varma , B. , and Gopala Rao , L.V.V. 8626 8639 2016 10.15680
- Li , J. , Wahl , T. , Yoo , S.-W. , and Song , A. Computational and Experimental Study on Transmission Loss of Automotive Exhaust Muffler System SAE Technical Paper 2003-01-1648 2003 10.4271/2003-01-1648