| NUMERICAL ANALYSIS OF STRIKE OF PISTON TO CYLINDER UNDER SUPERCHARGE CONDITIONS |
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| 作者姓名： | 余志壮 宋正华 董光能 谢友柏 |
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| 作者单位： | [1]DepartmentofMechanicalEngineering,Xi＇anJiaotongUniversity,Xi＇an710049,China [2]DepartmentofMechanicalEngineering,Xi＇anJiaotongUniversity,Xi＇an710049,China |
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| 基金项目： | ThisworkwassupportedbytheNationalNaturalScienceFoundationofChina(No.50175088)andTaihoKogyoTribologyResearchFoundationofJapan(No.10444481). |
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| 摘 要： | Objective To investigate the changes to the strike extent of piston to cylinder after engine supercharge design. Methods The lubrication model between the skirt of piston and liner is established by means of piston dynamics, combined with the hydrodynamic lubrication equation. Optimized numerical analysis method is employed in solving the dynamics and lubrication equations. The analyses about piston strike under two combustion gas pressures are performed. Results The peak values of maximum eccentricity under supercharge condition are much greater than under non-supercharge condition, which means a stronger impulsion of piston to cylinder wall and a greater possibility of scuffing. The horizontal velocities of piston in supercharge condition are larger, which illuminate the more unstable motion state. Conclusion The analysis gives a new conclusion. Combustion gas pressure plays an important role in the piston strike motion. Influences of supercharge should be taken into account so that the traditional product test items can be improved.
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| 关 键 词： | 活塞 增压 气缸 冲击力 |
NUMERICAL ANALYSIS OF STRIKE OF PISTON TO CYLINDER UNDER SUPERCHARGE CONDITIONS |
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| Yu Zhizhuang,Song Zhenghua,Dong Guangneng,Xie Youbai.NUMERICAL ANALYSIS OF STRIKE OF PISTON TO CYLINDER UNDER SUPERCHARGE CONDITIONS[J].Academic Journal of Xi’an Jiaotong University,2004,16(2):106-109. |
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| Authors: | Yu Zhizhuang Song Zhenghua Dong Guangneng Xie Youbai |
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| Institution: | 1. Department of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
2. Department of Test Instrument, Luoyang Bearing Corp., Luoyang 471039, China. |
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| Abstract: | Objective To investigate th e changes to the strike extent of piston to cylinder after engine supercharge de sign. Methods The lubrication model between the skirt of piston and liner is established by means of piston dynamics, combined with the hydrody namic lubrication equation. Optimized numerical analysis method is employed in s olving the dynamics and lubrication equations. The analyses about piston strike under two combustion gas pressures are performed. Results The p eak values of maximum eccentricity under supercharge condition are much greater than under non-supercharge condition, which means a stronger impulsion of pisto n to cylinder wall and a greater possibility of scuffing. The horizontal velocit ies of piston in supercharge condition are larger, which illuminate the more uns table motion state. Conclusion The analysis gives a new conclus ion. Combustion gas pressure plays an important role in the piston strike motion . Influences of supercharge should be taken into account so that the traditional product test items can be improved. |
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| Keywords: | piston supercharge strike |
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