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The Practical Development of a Heavy Duty Truck Engine for Low Noise
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English
Abstract
A systematic and practical approach to noise reduction is described as applied to a 200kW heavy duty truck engine. The project described covered an initial detailed assessment of the noise and vibration characteristics including running engine tests and experimental modal analysis. The components identified as major noise sources were re-designed with due regard to practicality and ease of production. The techniques used to achieve a 95 dBA noise target (at 1m and rated conditions) with minimum shielding are described. A 93 dBA version is also described in which additional shielding was incorporated. These new noise levels represent reductions of approximately 4 dB and 6 dB respectively from the baseline engine.
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Citation
Morrison, D., "The Practical Development of a Heavy Duty Truck Engine for Low Noise," SAE Technical Paper 861285, 1986, https://doi.org/10.4271/861285.Also In
References
- Council Directive 84/424/EEC Amending Directive 70/157/EEC on the approximation of the laws of the Member States relating to the persmissible sound level and the exhaust system of motor vehicles Official Journal of the European Communities L 238/31
- Noise - Final Report - Wilson Committee on the problem of Noise HMSO Publication 1963
- Challen B.J. The Effect of Combustion System on Engine Noise SAE 750798
- Croker M.D. Digital Processing Revitalises Old Techniques SAE 820366
- Croker M.D. Engine Structure Analysis For Low Noise - The Options SAE 850970