Mixed Lubrication and Friction Power Loss of Piston Ring Pack

Abstract:

With consideration of asperity contact, the minimum oil film thickness and friction power loss are calculated by simultaneous solution of the dynamics, blow-by and lubrication of piston ring pack. Take the piston ring pack in the first cylinder from the free end of a six-cylinder diesel engine for example, results show that the asperity contact takes place at all of the compression rings and oil ring; the minimum oil film thickness is 1.04μm at the top ring; the total friction loss power is 0.94kW, the top ring accounts for 37.2%, the second ring accounts for 33.0%, the oil ring accounts for 29.8%.

• Periodical: Applied Mechanics and Materials (Volumes 668-669)
• Pages: 205-208
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.668-669.205
• Online since: October 2014
• Authors: Xiao Ri Liu*, Guo Xiang Li, Shu Zhan Bai, Yu Ping Hu
• Keywords: Dynamic, Frictional Power Loss, Mixed Lubrication, Piston Ring Pack

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