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19 Separation of Combustion Noise using Transient Noise Generation Model
Published October 29, 2002 by Society of Automotive Engineers of Japan in Japan
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In a running engine, various impacts are excitation sources for structural vibrations and engine noises. Engine noises are classified, depending on their excitation sources, into the combustion noise, the combustion induced mechanical noise and the mechanical noise. It is difficult to measure such noises separately because some impacts occur closely in time and space. In this paper, a transient noise generation model of an engine was proposed considering vibration and its damping of engine structure. The present model was verified through the single explosion excitation experiment for a stationary engine. Using the noise generation model, the combustion noise was separated from the total noise radiating from a running four-stroke gasoline engine for motorcycles. It was found that the combustion noise had larger power at lower frequencies than higher frequencies. However, its contribution to the total engine noise was relatively small.
CitationKOMORI, M., MIURA, Y., MIKAMI, M., and KOJIMA, N., "19 Separation of Combustion Noise using Transient Noise Generation Model," SAE Technical Paper 2002-32-1788, 2002.
- Mourelatos, Z. P. “A crankshaft system model for structural dynamic analysis of internal combustion engines” Computers & Structures 79 2001 2009 2027
- Hoshino, H. Sakurai, Y. Goino, Y. “Improvement of Noise Radiated from Engine with Time History Simulation of Cylinder Block Vibration” Bulletin of JSAE 29 1998 65 70
- Nishimura, Y. Shimizu, K. “Analysis of Acoustic Radiation Characteristics of Engine Compartment and Application to Reduction of Engine Noise” Bulletin of JSAE Review 16 1995 325
- Okamura, H. “Engine Noise Reduction by Application of rubber Torsional Damper to Crankshaft” Bulletin of JSAE 30 l 1999 67 72
- Yamada, J. Sano, T. Maeda, M. “Development of Measuring Technique to Estimate the Contribution of Mechanical Noise Sources JSAE Review 18 1997 202
- Ozawa, H. Nakada, T. “Pseudo cylinder pressure excitation for analyzing the noise characteristics of the engine structure” JSAE Review 20 1999 67 72
- Park, S. H. Kim, Y. H. “Visualization of pass-by noise by means of moving frame acoustic holography” The Journal of the Acoustical Society of America 110 2001 2326 2339
- OKUBO, M. YONEZAWA, T. “Study of Method to Separate Engine Noise Sources using Coherence Analysis” JSAE 29 1998 152 157
- Hirano, I. Kondo, M. “Using multiple regression analysis to estimate the contributions of engine-radiated noise components” JSAE Review 20 1999 363 368
- KIM, Y. S. LEE, D. J. “Numerical analysis of internal combustion engine intake noise with a moving piston and a valve” Journal of Sound and Vibration 241 5 2001 895 912
- Kojima, N. Zhou, H. Mikami, M. Kawamoto, Y. “Separation of Piston-Slap Noise from Engine Noise” Proceedings of Inter-noise 97, the 1997 International Congress on Noise Control Engineering 1997 235 238