Combustion Noise of Two-Stroke Gasoline Engines and its Reduction Techniques 891125
In order to obtain more reduction of two-stroke motorcycle engine noise than usual, it becomes necessary to make improvements within the combustion process itself.
This study was carried out for two objectives. One is the investigation of the relationship between combustion and noise, and the other one is the development of noise reduction techniques.
As the result, it was discovered that there was a significant correlation between engine noise and (dP/dθ)max, called the maximum rate of cylinder pressure rise. Therefore, the reduction of the (dP/dθ) max was recognized to be effective for engine noise reduction.
The optimized alteration of combustion chamber shape is the most effective noise reduction technique, because it is able to reduce (dP/dθ) max without any sacrifice of engine power. In fact, the level of noise reduction can be predicted by one of the parameters obtained from the combustion chamber shape.
Citation: Takeyama, T. and Nomura, K., "Combustion Noise of Two-Stroke Gasoline Engines and its Reduction Techniques," SAE Technical Paper 891125, 1989, https://doi.org/10.4271/891125. Download Citation
Author(s):
Toshinori Takeyama, Kazuhlko Nomura
Affiliated:
Yamaha Motor Co., Ltd.
Pages: 8
Event:
SAE Noise and Vibration Conference and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Proceedings of the 1989 Noise and Vibration Conference-P-222, Two-Stroke Engines-PT-69
Related Topics:
Combustion chambers
Combustion and combustion processes
Two stroke engines
Engine cylinders
Noise
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
