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    • Profile Optimization Design and Sealing Performance Research of Cylinder Holes Based on Pre-compensation
    DOI：10.13949/j.cnki.nrjgc.2024.04.012
    Key Words:diesel engine  cylinder liner deformation  pre-compensation  scheme design  performance
    Author NameAffiliationE-mail
    BI Yuhua Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 13317019@kust.edu.cn 
    XIE Qiaoqiao Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 2957743270@qq.com 
    ZU Song Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 14813204972@qq.com 
    ZHANG Guoqiang Kunming Yunnei Power Co.， Ltd.， Kunming 650217， China 497563236@qq.com 
    ZHANG Size* Yunnan Province Yunnei Power Machinery Manufacturing Co.， Ltd.， Kunming 651700， China 893036109@qq.com 
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    Abstract:Taking a non-road high-pressure common rail diesel engine as the research object， a bolt–cylinder head–cylinder gasket–cylinder liner–block assembly coupling model was established. The thermal-mechanical coupling out-of-round deformation of cylinder liner under working conditions was studied by combining simulation analysis and test. Based on the deformation results of the cylinder liner， 5 kinds of special-shaped cylinder liner pre-compensation schemes （conical， bottleneck， spindle， elliptical， elliptical spindle composite） with different profile characteristics were designed. The thermo-mechanical coupling deformation， Fourier deformation amplitude， sealing and friction performance of different special-shaped cylinder liners were studied. The results show that at the 101.8 mm section of the third cylinder， the maximum radial deformation of the ellipse scheme is reduced by 15.42% compared with the original cylinder liner. The blow-by quantity of the elliptical cylinder liner is decreased by 1.34% compared to the original engine cylinder liner， while the blow-by quantity of other schemes is greater than that of the original engine cylinder liner. Compared to the original engine cylinder liner， the oil consumption of the spindle-shaped cylinder liner and the elliptical spindle compound-shaped cylinder liner is decreased by 21.36%.
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