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Characteristics of Diesel Engine Noise According to EGR Rate Change during Transient Operation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 15, 2015 by SAE International in United States
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Diesel engine noise is classified into mechanical noise, flow dynamic noise and combustion noise. Among these, combustion noise level is higher than the others due to the high compression ratio of diesel combustion and auto ignition. The injected fuel is mixed with air in the ignition delay process, followed by simultaneous ignition of the premixed mixture. This process results in a rapid pressure rise, which is the main source of combustion noise. The amount of fuel burned during premixed combustion is mainly affected by the ignition delay. The exhaust gas recirculation (EGR) rate has an impact on ignition delay, and thus, it influences the combustion noise characteristics. Therefore, during the transient state, the combustion noise characteristics change as the EGR rate deviates from the target value.
In this study, the effect of the EGR rate deviation during the transient state of the combustion noise is examined. A 1.6 liter diesel engine with a VGT was used for the experiment. The EGR rate was acquired by measuring temperatures using fast response thermocouples at the intercooler exit, the intake manifold, and the EGR cooler exit. The heat transfer model was adopted to improve the accuracy of the EGR measurement. As a result, the shorter ramp time in acceleration leads to the higher EGR rate, a longer ignition delay, greater RoHR peak value and higher combustion noise.
CitationLee, S., Lee, S., Min, K., and Jung, I., "Characteristics of Diesel Engine Noise According to EGR Rate Change during Transient Operation," SAE Technical Paper 2015-01-2296, 2015, https://doi.org/10.4271/2015-01-2296.
- Shen, G., “Vehicle Noise, Vibration, and Sound Quality.” (Warrendale, SAE International, 2012), ISBN 978-0-7680-3484-4.
- Tousignant, T., Wellmann, T., Govindswamy, K., Heuer, S. et al., “Application of Combustion Sound Level (CSL) Analysis for Powertrain,” SAE Technical Paper 2009-01-2168, 2009, doi:10.4271/2009-01-2168.
- Mollenhauer, K., “Handbook of Diesel Engines”(Heidelberg, Springer,2010)
- Torregrosa A, Broatch A, Margot X, Marant V and Beaug' eY “3D study of resonance phenomenon in combustion chamber of DI automotive diesel engines using CFD approach” Int. J. Engine Res. 5 83-91, 2004.
- Payri, F., Broatch, A., Margot, X. and Monelletta, L., “Sound quality assessment of Diesel combustion noise using in-cylinder pressure components,” Meas. Sci. Technol., Vol. 20, no. 1, p.015107, Jan. 2009
- Kanda, H., Okubo, M., and Yonezawa, T., “Analysis of Noise Sources and Their Transfer Paths in Diesel Engines,” SAE Technical Paper 900014, 1990, doi:10.4271/900014.
- Heywood, J., “Internal Combustion Engine Fundamentals” (New York, McGRAW-HILL, 1988)
- Zhao, H., “Advanced direct injection combustion engine technologies and development”,(Boca Raton, CRC Press, 2010).
- Shibata, G., Ushijima, H., Ogawa, H., and Shibaike, Y., “Combustion Noise Analysis of Premixed Diesel Engine by Engine Tests and Simulations,” SAE Technical Paper 2014-01-1293, 2014, doi:10.4271/2014-01-1293.
- Carlucci, P., Ficarella, A., and Laforgia, D., “Effects of Pilot Injection Parameters on Combustion for Common Rail Diesel Engines,” SAE Technical Paper 2003-01-0700, 2003, doi:10.4271/2003-01-0700.
- Assanis, D., Filipi, Z., Fiveland, S. and Syrimis, M., “A Predictive Ignition Delay Correlation Under Steady-State and Transient Operation of a Direct Injection Diesel Engine, J. Eng. Gas Turbines Power 125(2), 450-457, 2003, doi:10.1115/1.1563238.
- Rakopoulos, C., Giakoumis, E., “Diesel Engine Transient Operation: Principles of Operation and Simulation Analysis”(London, Springer, 2009)
- Kalsi, K., Collings, N., Heaton, D., and Faulkner, S., “Study of Steady State and Transient EGR Behaviour of a Medium Duty Diesel Engine,” SAE Technical Paper 2008-01-2438, 2008, doi:10.4271/2008-01-2438.
- Hagena, J., Filipi, Z., and Assanis, D., “Transient Diesel Emissions: Analysis of Engine Operation During a Tip-In,” SAE Technical Paper 2006-01-1151, 2006, doi:10.4271/2006-01-1151.
- Kang, H. and Farrell, P., “Experimental Investigation of Transient Emissions (HC and NOx) in a High Speed Direct Injection (HSDI) Diesel Engine,” SAE Technical Paper 2005-01-3883, 2005, doi:10.4271/2005-01-3883.
- Cho, S., Ahn, S., and Kim, Y., “A simple model to estimate the impact force induced by piston slap” J. Sound Vib. 255 229-42, 2002.
- Payri, F., Broatch, A., Tormos, B. and Marant, V., “New methodology for in-cylinder pressure analysis in direct injection diesel engines-application to combustion noise,” Meas. Sci. Technol., Vol. 16, no. 2, pp. 540-547, Feb. 2005.
- Chiavola, O., Chiatti, G., and Recco, E., “Analysis of the Relationship between Noise Emission and In-Cylinder Pressure in a Small Displacement Diesel Engine,” SAE Technical Paper 2014-01-1364, 2014, doi:10.4271/2014-01-1364.
- SAE International Surface Vehicle Recommended Practice, "Engine Sound Level Measurement Procedure," SAE Standard J1074, Stabilized May 2014.
- Russell, M. and Haworth, R., “Combustion Noise from High Speed Direct Injection Diesel Engines,” SAE Technical Paper 850973, 1985, doi:10.4271/850973.
- Mollenhauer K. And Tschoeke H., “Handbook of Diesel Engines”, Springer, 2010, doi:10.1007/978-3-540-89083-6
- Han, Y., Liu, Z., Zhao, J., Xu, Y. et al., “EGR Response in a Turbo-charged and After-cooled DI Diesel Engine and Its Effects on Smoke Opacity,” SAE Technical Paper 2008-01-1677, 2008, doi:10.4271/2008-01-1677.
- Frank, I., David D., Theodore B. and Adrienne L., “introduction to Heat Transfer, 5th edition, pp. 484-487, John Wiley & Sons, 2005
- Lee, S., Lee, J., Lee, S., Kim, D. et al., “Study on Reduction of Diesel Engine Out Emission through Closed Loop Control based on the In-Cylinder Pressure with EGR Model,” SAE Technical Paper 2013-01-0322, 2013, doi:10.4271/2013-01-0322.
- Jung, I., Jin, J., So, H., Nam, C. et al., “An Advanced Method for Developing Combustion Noise through the Analysis of Diesel Combustion,” SAE Int. J. Engines 6(2):1379-1385, 2013, doi:10.4271/2013-01-1901.