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Parametric Analysis of Piston Assembly Focusing on Friction Losses Reduction and Fuel Consumption
Technical Paper
2010-36-0213
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents a parametric analysis of the piston assembly of an Otto cycle engine, focusing on mechanical efficiency and fuel consumption through the implementation of a numerical model of the piston secondary motion. This model considers a mixed lubrication between the cylinder liner and the piston skirt as well as the piston skirt profile and surface waviness, being able to calculate the hydrodynamic and contact friction forces and the entire piston trajectory through the course of the cylinder. The studied parameters include the connecting rod length, the piston skirt waviness and the piston off-set. A comparative analysis is finally made using the results piston secondary motion inside the cylinder bore, the hydrodynamics and contact forces as well as the friction force between the piston skirt and the cylinder liner as a function of the crankshaft angle.
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Citation
Loureiro, T. and Pesce, C., "Parametric Analysis of Piston Assembly Focusing on Friction Losses Reduction and Fuel Consumption," SAE Technical Paper 2010-36-0213, 2010, https://doi.org/10.4271/2010-36-0213.Also In
References
- Braga, B. et al. Introdução à Engenharia Ambiental: o desafio do desenvolvimento sustentável Second Pearson Prentice Hall São Paulo 2005
- Heywood, J. B. Internal Combustion Engine Fundamentals McGraw-Hill New York 1988
- Mansouri, S. H. Wong, V. W. “Effects of piston design parameters on piston secondary motion and skirt-liner friction” Journal of Engineering Tribology 219 j 435 449 2005 10.1243/135065005X34026
- Wakabayashi, R. Takiguchi, M. Shimada, T. Mizuno, Y. et al. “The Effects of Crank Ratio and Crankshaft Offset on Piston Friction Losses,” SAE Technical Paper 2003-01-0983 2003 10.4271/2003-01-0983
- Adachi, S. Horio, K. Nakamura, Y. Nakano, K. et al. “Development of Toyota 1ZZ-FE Engine,” SAE Technical Paper 981087 1998 10.4271/981087
- Zhu, D. et al. “A Numerical Analysis for Piston Skirts in Mixed Lubrication - Part I: Basic Modeling” ASME Journal of Tribology 114 553 562 July 1992
- Zhu, D. et al. “A Numerical Analysis for Piston Skirts in Mixed Lubrication - Part II: Deformation Considerations” ASME Journal of Tribology 115 125 133 January 1993
- Mufti, R. A. Priest, M. “Experimental Evaluation of Piston-Assembly Friction Under Motored and Fired Conditions in a Gasoline Engine” ASME Journal of Tribology 127 826 836 October 2005 10.1115/1.1924459
- Liu, K. Xie, B. Y. Gui, C. L. “A comprehensive study of the friction and dynamic motion of the piston assembly” Proc Instn Mech Engrs 212 j 221 226 1998
- Balakrishnan, S. Rahnejat, H. “Isothermal transient analysis of piston skirt-to-cylinder wall contacts under combined axial, lateral and tilting motion” IOP: Journal of Physics D. 38 787 799 2005
- Meng, F. M. et. al. “Thermo-elasto-hydrodynamic lubrication analysis of piston skirt considering oil film inertia effect” Tribology International 40 1089 1099 2007
- Livanos, G. A. Kyrtatos, N. P. “Friction model of a marine diesel engine piston assembly” Tribology International 40 1441 1453 2007 10.1016/j.triboint.2007.01.020
- Patir, N. Cheng, H. S. “An Average Flow Model for Determining Effects of Three-Dimensional Roughness on Partial Hydrodynamic Lubrication” ASME Journal of Lubrication Technology 100 12 17 January 1978
- Johnson, K. L. Contact Mechanics 9 a CB: Cambridge University Press Cambridge 1985
- Loureiro, T. W. “Análise paramétrica do conjunto pistão, biela e árvore de manivelas com foco em consumo de combustível” Master dissertation Mechanical Engineering Department, Escola Politécnica - Universidade de São Paulo São Paulo 2009