This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Engine Noise Reduction by Structural Study of Cylinder Block
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1980 by SAE International in United States
Annotation ability available
A structural study of the cylinder block was made using a 4-cylinder, 1,800 cc gasoline engine with an aim toward reducing engine noise. First, we studied the relationship between cylinder block vibration and radiated noise, and also the principal component modes of noise and vibration.
From the results obtained, it became clear that engine noise could be reduced by suppressing the basic natural vibration of the cylinder block.
Then, alternative shapes of engine blocks were examined in an attempt to reduce noise with a minimal change in present production facilities and engine weight, using the finite element method.
The trial cylinder block was built into an engine after examination by the impulse excitation method and holography. As the result of testing it in running condition, we were able to reduce the noise of the engine proper 2.5db-A with a weight increase of about 3 percent.
CitationNagayama, I., Araki, Y., Kakuta, K., and Usuba, Y., "Engine Noise Reduction by Structural Study of Cylinder Block," SAE Technical Paper 800441, 1980, https://doi.org/10.4271/800441.
- Chan, C. M. P. Anderton, D. “The Correlation of Machine Structure Surface Vibration and Radiated Noise.” Inter-noise 72 Proceedings
- Masuko, K. Abe, T. “On Factors of Noise Emitted by a Small Vehicle and Noise Level Simulation of Pass-by Test.” SAE Paper 770011
- Horio, T. Yazaki, K. “Fire-wall Silencer Using Triple Layer Materials.” 1978 JSAE Autumn Meeting
- Ford, D. M. Hayes, P. A. Smith, S. K. “Engine Noise Reduction by Structural Design Using Advanced Experimental and Finite Element Methods.” SAE Paper 790366
- Grover, E. C. Lalor, N. “A Review of Low Noise Diesel Engine Design at I. S. V. R.” Journal of Sound & Vibration 1973 28 3