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Investigation of Knock Damage Mechanisms on a GDI TC Engine
Technical Paper
2017-24-0060
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The recent search for extremely efficient spark-ignition engines has implied a great increase of in-cylinder pressure and temperature levels, and knocking combustion mode has become one of the most relevant limiting factors. This paper reports the main results of a specific project carried out as part of a wider research activity, aimed at modelling and real-time controlling knock-induced damage on aluminum forged pistons. The paper shows how the main damage mechanisms (erosion, plastic deformation, surface roughness, hardness reduction) have been identified and isolated, and how the corresponding symptoms may be measured and quantified. The second part of the work then concentrates on understanding how knocking combustion characteristics affect the level of induced damage, and which parameters are mainly responsible for piston failure. For this purpose, steady-state tests have been conducted controlling different and constant levels of knock intensity (i.e., pressure waves oscillation amplitude) and thermal load (i.e., average temperature and pressure levels inside the combustion chamber). Since these parameters are strictly interrelated for a given engine operating condition and for a given fuel, fuels with different knock resistance (i.e., RON number) have been employed, to allow a clearer understanding of the damage distribution in the knock intensity-thermal load domain.
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Cavina, N., Rojo, N., Ceschini, L., Balducci, E. et al., "Investigation of Knock Damage Mechanisms on a GDI TC Engine," SAE Technical Paper 2017-24-0060, 2017, https://doi.org/10.4271/2017-24-0060.Data Sets - Support Documents
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References
- Mahle GmbH Piston and engine testing 2012
- Jahn , T. , Schuerg , F. , and Kempf , S. Knock Control on Small Four-Two-Wheeler Engines SAE Technical Paper 2012-32-0052 2012 10.4271/2012-32-0052
- Millo , F. and Ferraro , C. Knock in S.I. Engines: A Comparison between Different Techniques for Detection and Control SAE Technical Paper 982477 1998 10.4271/982477
- Cavina N. , Po G. , Poggio L. Ion Current Based Spark Advance Management for Maximum Torque Production and Knock Control Proceedings of the 8th Biennial ASME Conference on Engineering Systems Design and Analysis Torino, Italy July 4-7 2006 NEW YORK ASME International 2006 0-7918-3779-3
- Cavina , N. , Sgatti , S. , Cavanna , F. , and Bisanti , G. Combustion Monitoring Based on Engine Acoustic Emission Signal Processing SAE Technical Paper 2009-01-1024 2009 10.4271/2009-01-1024
- Maly , R. , Klein , R. , Peters , N. , and Kðnig , G. Theoretical and Experimental Investigation of Knock Induced Surface Destruction SAE Technical Paper 900025 1990 10.4271/900025
- Nates , R. and Yates , A. Knock Damage Mechanisms in Spark-Ignition Engines SAE Technical Paper 942064 1994 10.4271/942064
- Boehm , G. and Harrer , J. Nickel Coated Pistons for Improved Durability in Knock Control Engines SAE Technical Paper 900453 1990 10.4271/900453
- Fitton , J. and Nates , R. Knock Erosion in Spark-Ignition Engines SAE Technical Paper 962102 1996 10.4271/962102
- Nates , R. Thermal Stresses Induced by Knocking Combustion in Spark-Ignition Engines SAE Technical Paper 2000-01-1238 2000 10.4271/2000-01-1238
- Ceschini , L. , Morri , A. , Balducci , E. , Cavina , N. et al. Experimental observations of engine piston damage induced by knocking combustion MATERIALS & DESIGN 114 15 January 2017 312 325 0264-1275 http://dx.doi.org/10.1016/j.matdes.2016.11.015
- Panousakis , D. , Gazis , A. , Patterson , J. , and Chen , R. Analysis of SI Combustion Diagnostics Methods Using Ion-Current Sensing Techniques SAE Technical Paper 2006-01-1345 2006 10.4271/2006-01-1345
- Cavina , N. , Poggio , L. , and Sartoni , G. Misfire and Partial Burn Detection based on Ion Current Measurement SAE Int. J. Engines 4 2 2451 2460 2011 10.4271/2011-24-0142
- http://www.alma-automotive.it/en/news/obi-1-our-most-compact-combustion-analysis-tool-004
- Ceschini , L. , Morri , A. , Morri , A. , Di Sabatino , M. Effect of thermal exposure on the residual hardness and tensile properties of the EN AW-2618A piston alloy Mater. Sci. Eng. A. 639 2015 288 297 10.1016/j.msea.2015.04.080
- Balducci , E. , Morri , A. , Ceschini , L. , Morri , A. Effect of thermal exposure on mechanical properties of EN AW-2618 and EN AW-4032 piston alloys La Metall. Ital. 6 2016 89 92
- Balducci , E. , Ceschini , L. , Messieri , S. , Wenner , S. et al. Thermal stability of the lightweight 2099 Al-Cu-Li alloy: Tensile tests and microstructural investigations after overaging Mater. Des. 119 2017 54 64 10.1016/j.matdes.2017.01.058
- Grandin , B. , Denbratt , I. , Bood , J. , Brackmann , C. et al. The Effect of Knock on the Heat Transfer in an SI Engine: Thermal Boundary Layer Investigation using CARS Temperature Measurements and Heat Flux Measurements SAE Technical Paper 2000-01-2831 2000 10.4271/2000-01-2831
- Cavina , N. , Corti , E. , Minelli , G. , Moro , D. et al. Knock Indexes Normalization Methodologies SAE Technical Paper 2006-01-2998 2006 10.4271/2006-01-2998
- Worret , R. , Bernhardt , S. , Schwarz , F. , and Spicher , U. Application of Different Cylinder Pressure Based Knock Detection Methods in Spark Ignition Engines SAE Technical Paper 2002-01-1668 2002 10.4271/2002-01-1668
- Corti , E. , Forte , C. , Cazzoli , G. , Moro , D. et al. Comparison of Knock Indexes Based on CFD Analysis Energy Procedia 101 2016 917 924 1876-6102
- Corti , E. , Moro , D. , and Solieri , L. Real-Time Evaluation of IMEP and ROHR-related Parameters SAE Technical Paper 2007-24-0068 2007 10.4271/2007-24-0068
- Corti , E. , Forte , C. , Bianchi , G. , and Moro , D. Relating Knocking Combustions Effects to Measurable Data SAE Int. J. Engines 8 5 2015 10.4271/2015-24-2429