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Active Muffler for Single Cylinder Engine, Using Electronic Throttle Control for Formula Student Cars
ISSN: 0148-7191, e-ISSN: 2688-3627
Published July 10, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Event: International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility
Formula SAE is a prestigious engineering design competition, where student team design, fabricate and test their formula style race car, with the guidelines of the FSAE rulebook, according to which the car is designed, for example the engine must be a four-stroke, Otto-cycle piston engine with a displacement no greater than 710cc.
According to FSAE 2017 Rule Book , ARTICLE 3, IC3.2 and IC3.3 state that the maximum sound level should not exceed 110 dBC at an average piston speed of 15:25 m/s (for the KTM 390 engine, which has 60 mm stroke length, the noise level will be measured at 7500 RPM) and 103 dBC at Idle RPM. So, the active muffler which works as a normal reflective muffler till the 7500 RPM range, after which an electronic controlled throttle mechanism is used to reduce the backpressure (since after 7500 RPM the noise level doesn't matter in FSAE) by using tach signal from the engine to control the throttle (two position). The electronic throttle will be controlled using an ardino board and control the backpressure, with respect to the Engine RPM. This ensures that Noise level rules are met without compromising on the performance of the engine.
Further research is required in utilizing the active throttle setup for continuously variable position (with respect to the RPM), in order to tune the exhaust system according to individual requirements and for achieving the required acoustic tuning of the exhaust system.
CitationPraveen, V. and Sethupathi, P., "Active Muffler for Single Cylinder Engine, Using Electronic Throttle Control for Formula Student Cars," SAE Technical Paper 2017-28-1935, 2017, https://doi.org/10.4271/2017-28-1935.
Data Sets - Support Documents
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- 2017-2018 Formulae SAE® Rules book
- Bönnen , D. , Bamdad-Soufi , D. , Steinkilberg , H. , and Abram , K. Possibilities and Constraints for Lightweight in Exhaust Systems SAE Technical Paper 2014-01-2058 2014 10.4271/2014-01-2058
- Guedes , R. , Botteon , A. , Ferraz , F. , Junior , L. et al. Transmission Loss Analysis of an Exhaust System of Combustion Engines. Part I: Measurements SAE Technical Paper 2004-01-3404 2004 10.4271/2004-01-3404
- Liu , B. , Maeno , M. , Hase , S. , and Wakamatsu , S. A Study of a Dual Mode Muffler SAE Technical Paper 2003-01-1647 2003 10.4271/2003-01-1647
- Ji , Z. Acoustic Attenuation Performance of a Multi-chamber Muffler with Selective Sound-absorbing Material Placement SAE Technical Paper 2007-01-2202 2007 10.4271/2007-01-2202
- Shah , S. , Kuppili , S. , Hatti , K. , and Thombare , D. A Practical Approach towards Muffler Design, Development and Prototype Validation SAE Technical Paper 2010-32-0021 2010 10.4271/2010-32-0021
- Ambrosino , M. , Lubrano , L. , Sciacca , F. , Giorgi , P. et al. DualMode Sporty Exhaust Development SAE Technical Paper 2011-01-0926 2011 10.4271/2011-01-0926
- Krüger , J. , Castor , F. , and Jebasinski , R. Active Exhaust Silencers - Current Perspectives and Challenges SAE Technical Paper 2007-01-2204 2007 10.4271/2007-01-2204
- Sen , S. Prediction of Flow and Acoustical Performance of an Automotive Exhaust System using 3-D CFD SAE Technical Paper 2011-01-1068 2011 10.4271/2011-01-1068
- Li , J. , Wahl , T. , Yoo , S. , 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