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    • Effects of Piston Ring Structural Parameters on the Sealing and Friction Performance Considering Cylinder Liner Out-of-Round Deformation
    DOI：10.13949/j.cnki.nrjgc.2023.01.005
    Key Words:cylinder liner out-of-round deformation  piston ring  engine oilconsumption  friction loss
    Author NameAffiliationE-mail
    BI Yuhua* Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 815569621@qq.com 
    SONG Jianping Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China  
    CHEN Siji Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China  
    WANG Zhi Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China  
    YU Fengrong* Faculty of Metallurgical and Energy Engineering， Kunming University of Science and Technology， Kunming 650500， China 89060448@qq.com 
    WEN Shijie China North Engine Research Institute（Tianjin）， Tianjin 300400， China  
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    Abstract:Taking a high-pressure common-rail diesel engine as the research object， a coupling assembly model of the engine and a dynamic model of piston-ring group were established and verified by test data. The out-of-round deformation of the dry cylinder liner was studied by using the assembly simulation model. On the basis of considering the out-of-round deformation of the cylinder liners， the effects of piston ring structural parameters on blow-by， lubricant oil consumption， and friction loss were studied by employing orthogonal test method. The results show that， among the structural parameters of the piston， the radial elasticity of the second ring， the gap between the second ring， and the lateral clearance of the top ring have the greatest influences on the amount of blow-by. The radial elastic force of the oil ring， the gap between the second ring， and the lateral clearance of the top ring have the greatest influences on the oil consumption. The radial elasticity of the oil ring， the gap between the oil ring openings， and the side gap of the oil ring have the greatest influences on the friction loss.
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