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Reducing Compression Brake Noise
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English
Abstract
A survey is made of compression brake noise levels in heavy duty diesel trucks, using test procedures based on the ISO and EPA driveby acceleration noise tests. The data shows that compression brake noise levels are very high if worn out or open stack exhaust systems are used. Compression brake noise is also audible with OEM exhaust systems and, in at least one case, potentially objectionable. Two methods for reducing brake noise are investigated: improved mufflers and the use of an exhaust brake with the compression brake. Both techniques demonstrate a potential for reducing compression brake noise.
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Citation
Reinhart, T. and Wahl, T., "Reducing Compression Brake Noise," SAE Technical Paper 971870, 1997, https://doi.org/10.4271/971870.Also In
References
- Reinhart T. E., “US Vehicle Noise Regulations and the Effects of Vehicle Condition”. SAE Paper 912709, November 1991
- Wahl T. J. and Reinhart T. E., “Developing a Test Procedure for Compression Brake Noise”, to be presented as an SAE Paper at the 1997 SAE Noise 8 Vibration Conference. May 1997.
- Environmental Protection Agency, “Noise Emission Standards for Transportation Equipment”. Title 40. Code of Federal Regulations, Chapter 1. Part 205. Subpart B - Medium and Heavy Trucks, as amended 51 FR 852, January 8. 1986.
- Society of Automotive Engineers Recommended Practice J366, Sound Level for Heavy Trucks and Buses.
- ISO 362 - Acoustics - Measurement of Noise Emitted by Accelerating Road Vehicles - Engineering Method.
- Letters from Richard Heggie Associates Pty Ltd. to the Australian Roads and Traffic Authority, February 2. 1995 and March 14, 1995.
- Private communication from the Jacobs Vehicle Equipment Company. 1996.
- Ruffinen M. A. Zen, Hamilton D. A., Hayes P. A., and Reinhart T. E.. “J366 Driveby Variability”. SAE Paper 951357, May 1995.