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An Analysis of the Movement of the Crankshaft Journals during Engine Firing
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English
Abstract
In order to clarify the generation mechanism of engine noise, which is a significant problem in the fast-burn engine, the behavior of the crankshaft, the force transferred to the main bearing caps supporting the crankshaft, and the deformation of the cylinder block were analyzed during engine firing.
As a result, it was determined that the crankshaft which deflects due to inertial force pushes the bearings violently under combustion pressure and causes intense fore-and-aft vibration of the bearings, which in turn causes vibration of the cylinder-block skirt. This is a main cause of combustion noise.
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Citation
Ishihama, M., Hayashi, Y., and Kubozuka, T., "An Analysis of the Movement of the Crankshaft Journals during Engine Firing," SAE Technical Paper 810772, 1981, https://doi.org/10.4271/810772.Also In
References
- Challen B.J. “The Effect of Combustion System on Engine Noise,” SAE Paper 750798
- DeJong R.G. Parsons N.E. “High Frequency Vibration Transmission through the Moving Parts of an Engine,” SAE Paper 800405
- Priede T. Grover E.C. Lalor N. “Relation between Noise and Basic Structural Vibration of Diesel Engines,” SAE Paper 690450
- Lalor N. Petyt M. “Modes of Engine Structure Vibration as a Source of Noise,” SAE Paper 750833
- Priede T. “Problems and Developments in Automotive Engine Noise Research,” SAE Paper 790205
- Hayashi Y. Sugihara K. Toda A. Ushijima Y. “Analytical Study on Engine Vibration Transfer Characteristics Using Single-Shot Combustion,” SAE Paper 810403