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Improving the Reliability of Piston for Increased Power Density by Changing the Shape of Piston Bowl for a Medium Speed Heavy Duty Diesel Engine
Technical Paper
2019-26-0048
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Global development trend in diesel engine is to extract more power from the same engine thereby increasing the brake mean effective pressure (BMEP). With increase in the engine BMEP, maintaining reliability of the pistons and piston ring set becomes challenging as mechanical and thermal loading increases simultaneously. Reliability can be maintained by changing the material to higher grade and/or applying different coatings; however this involves significant cost and development time. It is always preferred to keep the same material and improve the reliability of parts. In this work the BMEP of a heavy duty medium speed diesel engine is increased by 10% (from 22.8 bar BMEP to 25 bar BMEP) without change in the piston or piston ring set material. This is achieved by studying the effect of existing piston bowl shape and then changing the shape to improve the reliability of piston and piston ring set. A systematic 6 step methodology is followed. These steps are Theoretical study, CFD analysis of the in-cylinder combustion and heat transfer, Mechanical FEA analysis of the piston to establish factor of safety (FOS), long duration endurance testing, piston-piston ring set component merit rating after endurance testing and comparison with old piston and piston ring set merit rating. After completion of the above 6 steps, it is revealed that the long duration endurance test run parts of 25 bar BMEP engine are better as compared to 22.8 bar BMEP engine. New bowl shape designed with new methodology could strike balance between combustion and reliability performance. This paper describes this new methodology in detail.
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Gandhi, N., Sanadhya, K., Saxena, H., Aghav, Y. et al., "Improving the Reliability of Piston for Increased Power Density by Changing the Shape of Piston Bowl for a Medium Speed Heavy Duty Diesel Engine," SAE Technical Paper 2019-26-0048, 2019, https://doi.org/10.4271/2019-26-0048.Data Sets - Support Documents
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References
- Marcos , M. and Filho , P.R. Cooling of Automotive Pistons: Study of Liquid-Cooling Jets SAE Technical Paper 931622 1993 10.4271/931622
- Winship , M. and Morgan , W.J. Piston Design for the Nineties SAE Technical Paper 930273 1993 10.4271/930273
- Cha , S.-W. , Ha , E.-J. , Lee , K.-W. , and Chang , H. Development of Fatigue Durability Analysis Techniques for Engine Piston Using CAE SAE Int. J. Mater. Manf . 2 1 403 408 2009 10.4271/2009-01-0820
- Kamp , H. 2010
- Sander , W. and Schoeckle , S. Design and Fatigue Life Evaluation of Pistons for High BMEP Diesel Engines SAE Technical Paper 790857 1979 10.4271/790857
- Wanli , Y. , Yan , C. , Xiaolin , Z. , and Guoqing , L. Simulation of Non-steady Multidimensional Heat Transfer within Piston/Cylinder Liner Sliding Couple of Internal Combustion Engine SAE Technical Paper 2004-01-0599 2004 10.4271/2004-01-0599
- Crabb , D. , Fleiss , M. et al. New Modular Engine Platform from Volvo MTZ Worldwide 74 9 4 11 2013
- Zhu , Y. , Zhao , H. , Melas , D. , and Ladommatos , N. Computational Study of the Effects of the Re-Entrant Lip Shape and Toroidal Radii of Piston Bowl on a HSDI Diesel Engine’s Performance and Emissions SAE Technical Paper 2004-01-0118 2004 10.4271/2004-01-0118
- Woschni , G. and Fieger , J. Determination of Local Heat Transfer Coefficients at the Piston of a High Speed Diesel Engine by Evaluation of Measured Temperature Distribution SAE Technical Paper 790834 1979 10.4271/790834
- Montajir , R.M. , Tsunemoto , H. , Ishitani , H. , Koji , T. et al. A New Combustion Chamber Concept for Low Emissions in Small DI Diesel Engines SAE Technical Paper 2001-01-3263 2001 10.4271/2001-01-3263