Numerical Analysis for Elastohydrodynamic Lubrication of Cylinder Liner-Piston Ring of Internal Combustion Engine
When the Internal Combustion Engine(ICE) working, the cylinder liner and piston rings are in high-temperature and high-pressure environment and also endure fluctuating load which lead to severe wear.The cylinder liner and piston rings are the most important friction pairs which generate 50-60 percent friction loss of ICE. The wear of cylinder liner is the representation of ICE life. The working condition of piston rings affects directly the fuel economy and exhaust characteristics. So the elastohydrodynamic lubrication and friction analysis of cylinder liner-piston ring is one of the main research topics of ICE.Researchers have done a lot of studies on cylinder liner-piston ring elastohydrodynamic lubrication. But most of the mathematical models ignored the side impact force on cylinder liner which produced by the piston lateral motion. It has been proved by test and maintenance data that the piston can produce huge side impact force on cylinder liner in the initial stage of expansion stroke. The impact force always leads to severe wear of cylinder liner. So it is necessary to consider the impact force in elastohydrodynamic lubrication analysis of cylinder liner-piston ring of ICE.A mathematical model of elastohydrodynamic lubrication of cylinder liner-piston ring of ICE was set up in this paper. The model took into account many factors such as oil variable viscosity, variable density, elastic deformation of the cylinder liner, surface roughness of the cylinder liner-piston ring, and especially included the side force produced by the piston lateral motion. Using the advanced method solving elastohydrodynamic lubrication model---multi-grid method, a computer simulation program was also designed to solve the model. Using the computer program, we can obtain the elastohydrodynamic lubrication characteristics of cylinder liner-piston ring and the effects on them caused by parameters, which provides the basis for optimization design and wear forecasting of ICE.
internal combustion engine cylinder liner-piston ring elastohydrodynamic lubrication numerical analysis multi-grid method
Ma Guoqing Li Guoping Bian Xueliang Tan Runhua
Zhangjiakou Coal Mining Machinery CO., LTD, Zhangjiakou, 075025, China;School of Mechanical Engineer Zhangjiakou Coal Mining Machinery CO., LTD, Zhangjiakou, 075025, China School of Mechanical Engineering, Hebei University of Technology, Tianjin, 300130, China
国际会议
北戴河
英文
376-380
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）