This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Development of an Intake Silencer for a Two-Stroke Cycle-Spark Ignition Engine
Annotation ability available
Sector:
Language:
English
Abstract
In the case of small outboard motors, intake noise is the main sound source. Consequently, intake silencer improvement is a significant factor in the development of outboard motors.
A theoretical simulation was developed to aid the design of improved silencers. This simulation was based on the one-dimensional transfer matrix method (2,3)* and was validated by measurements recorded from a 2-channel FFT experimental testing apparatus. The resonance and anti-resonance characteristics of the measured and calculated results showed good consistency.
The simulation technique was utilized to develop an improved configuration and evaluation on a running engine indicated a significant noise reduction.
This study has demonstrated that the simulation technique is an effective silencer development method.
Recommended Content
Authors
Citation
Otani, H. and Okazaki, M., "The Development of an Intake Silencer for a Two-Stroke Cycle-Spark Ignition Engine," SAE Technical Paper 891757, 1989, https://doi.org/10.4271/891757.Also In
References
- GERMAN STANDARD DIN 45640 “Measurement of External Noise Emitted by Water Craft on Inland Waters” June 1970
- Fukuda M. Okuda J. “Noise Countermeasure and Design for Silencer” Kyoritsu Syuppan Japan Oct. 1976
- Nishimura M. Fukatsu S. Izumiyama K. Hasegawa M. “Experimental Acoustic Duct Analysis Based on Transfer Matrix Method (1st Report: A New Method for Measuring Transfer Matrices of Duct Elements)” Trans. Jpn. Soc. Mech. Eng., Part C 54 504 1740 1746 1988
- Suyama E. Hirata M. “Attenuation Constant of Plane Wave in a Tube (Acoustic Characteristic Analysis of Silencing Systems Based on Assuming of Plane Wave Propagation with Frictional Dissipation Part 1)” J. Acoust. Soc. Jpn. 35 4 152 164 1979