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Development Methods for low Noise Diesel Engines
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English
Abstract
One of the most important noise sources of an internal combustion engine powered vehicle or equipment is the engine itself. Consequently, noise abatement measures should first be applied to the engine, where they could be more effective from the cost/benefit standpoint. This paper deals with the reduction of noise excitation and vibration transmission through optimization of the combustion process (injection timing, swirl, configuration, pilot injection …) and of the components design.
To analyze the acoustical behavior of structures, FEM and Modal Analysis can be used. The results permit a ranking of the structures relative to other components, as far as their noise pattern is concerned, as well as identification of specially weak points, which can then be corrected.
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Citation
Flotho, A. and Spessert, B., "Development Methods for low Noise Diesel Engines," SAE Technical Paper 872249, 1987, https://doi.org/10.4271/872249.Also In
References
- Kochanowski H.A. Haller H. “Geräuschemission luftgekühlter Fahrzeug-Dieselmotoren.” XVIII. Int. Congress FISITA 5.-8 Mai 1980 Hamburg
- Schneider M. Schmillen K. Pischinger F. “Regularities of Cylinder Pressure Oscillations and Their Effects on the Combustion Process and Noise.” SAE 87 2248
- Leipold F.W. Hardenberg H.O. “Noise, Emissions and Performance of the Diesel Engine - a Comparison Between DI and IDI Combustion Systems.” SAE 75 0796
- Spessert B. “Untecsuchung des akustischen Verhaltens von Kurbelgehäusen und Zylinderblöcken unter besonderer Berücksichtigung des inneren Körperschalleitweges.” Dissertation RWTH Aachen 1987
- Dixon J. Grover E.C. Priede T. “Simulation of Combustion Induced Noise in a Non-Running Engine Structure by impulsive Hydraulic Excitation.” SAE 82 0364