This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Identification of Factors Influencing Premixed Diesel Engine Noise and Mechanism of Noise Reduction by EGR and Supercharging
Technical Paper
2013-01-0313
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
To determine the engine noise reduction methods, an engine noise research was conducted experimentally with a PCCI diesel engine. The engine employed in the experiments was a supercharged, single-cylinder DI diesel engine with a high pressure common rail fuel injection system. The engine noise was sampled by two microphones and the sampled engine noise was averaged and analyzed by an FFT sound analyzer. The engine was equipped with a pressure transducer and the combustion noise was calculated from the power spectrum of the FFT analysis of the in-cylinder pressure wave form and the cross power spectrum of the sound pressure of the engine noise. It is well known that the maximum pressure rise rate is the main parameter related to the engine noise. The PCCI engine was operated at a 1.0 MPa/°CA maximum pressure rise rate to eliminate the effects of the maximum pressure rise rate, and parameters which had the dominant effect on engine noise and combustion noise were determined. It was found that the combustion period and the maximum rise in the rate of heat release were the second and third most important parameters in the generated noise. The effects of the combustion period and the maximum rise in the rate of heat release on the noise frequency ranges were different. The combustion period is statistically closely related with the high frequency range of the noise, and the maximum rise in the heat release rate is clearly statistically related with the middle frequency range of the noise. Further, the mechanisms of the sound reduction by supercharging and EGR were investigated, and high load and low noise engine operation was shown to be possible with a combination of EGR and supercharging.
Recommended Content
Authors
Topic
Citation
Shibata, G., Shibaike, Y., Ushijima, H., and Ogawa, H., "Identification of Factors Influencing Premixed Diesel Engine Noise and Mechanism of Noise Reduction by EGR and Supercharging," SAE Technical Paper 2013-01-0313, 2013, https://doi.org/10.4271/2013-01-0313.Also In
References
- Hiraya , K. , Hasegawa , K. , Urushihara , T. , Iiyama , A. et al. A Study on Gasoline Fueled Compression Ignition Engine ∼ A Trial of Operation Region Expansion ∼ SAE Technical Paper 2002-01-0416 2002 10.4271/2002-01-0416
- Steeper , R. and De Zilwa , S. Improving the NOX-CO2 Trade-Off of an HCCI Engine Using a Multi-Hole Injector SAE Technical Paper 2007-01-0180 2007 10.4271/2007-01-0180
- Berntsson , A. and Denbratt , I. HCCI Combustion Using Charge Stratification for Combustion Control SAE Technical Paper 2007-01-0210 2007 10.4271/2007-01-0210
- Krasselt , J. , Foster , D. , Ghandhi , J. , Herold , R. et al. Investigations into the Effects of Thermal and Compositional Stratification on HCCI Combustion - Part I: Metal Engine Results SAE Technical Paper 2009-01-1105 2009 10.4271/2009-01-1105
- Herold , R. , Krasselt , J. , Foster , D. , Ghandhi , J. et al. Investigations into the Effects of Thermal and Compositional Stratification on HCCI Combustion - Part II: Optical Engine Results SAE Int. J. Engines 2 1 1034 1053 2009 10.4271/2009-01-1106
- Shibata , G. and Urushihara , T. Dual Phase High Temperature Heat Release Combustion SAE Int. J. Engines 1 1 1 12 2009 10.4271/2008-01-0007
- Shibata , G. and Urushihara , T. Realization of Dual Phase High Temperature Heat Release Combustion of Base Gasoline Blends from Oil Refineries and a Study of HCCI Combustion Processes SAE Int. J. Engines 2 1 145 163 2009 10.4271/2009-01-0298
- Shibata , G. and Urushihara , T. Stabilizations of High Temperature Heat Release CA50 and Combustion Period against Engine Load with the Dosage of Toluene in Fuel SAE Technical Paper 2010-01-0575 2010 10.4271/2010-01-0575
- Shibata , G. and Ogawa , H. HCCI Combustion Control by DME-Ethanol Binary Fuel and EGR SAE Technical Paper 2012-01-1577 2012 10.4271/2012-01-1577
- Okubo , M. , and Yonezawa , T. Study of Method of Separate Engine Noise Sources Using Coherence Analysis JSAE Technical Paper 896021 40 152 158 1989
- Ueda , T. Compendium Methods to Find a Relation (Japanese) Operations Research 42 7 493 496 1997