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关键结构参数对活塞二次运动影响的研究

Research on the influence of key structural parameters on piston secondary motion.

作者信息

Yang Haixiang, Lei Jilin, Deng Xiwen, Wen Jun, Wen Zhigao, Song Guofu, Mo Rui

机构信息

Yunnan Key Laboratory of Internal Combustion Engines, Kunming University of Science and Technology, Kunming, 650500, People's Republic of China.

Yunnan Key Laboratory of Plateau Emission of Internal Combustion Engines, Kunming Yunnei Power CO., LTD, Kunming, 650200, People's Republic of China.

出版信息

Sci Rep. 2021 Sep 27;11(1):19080. doi: 10.1038/s41598-021-98686-2.

DOI:10.1038/s41598-021-98686-2
PMID:34580397
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8476555/
Abstract

Piston secondary motion not only influences the side knocking of piston and frictional loss, but also influence the in-cylinder oil consumption and gas blow-by. An inline four-cylinder common rail diesel engine was chosen as the research object. Dynamic simulation model of piston assembly was built based on the piston and cylinder liner temperature field test. The impacts of pinhole offset, liner clearance and piston skirt ovality on piston secondary motion were researched. Based on the surface response method, the influence of multiple factors on friction power loss and slapping energy is estimated. The results indicate that: in-cylinder stress condition of piston will change with its structural parameters, then the secondary motion of piston will be affected as a result. Pinhole offset, liner clearance, piston skirt ovality and the interaction of the latter two all have significant effects on the friction power loss, while the slapping energy is significantly affected by liner clearance. Therefore, the parameters can be designed based on the significance level to optimize the secondary motion characteristics of the piston.

摘要

活塞的二次运动不仅会影响活塞的侧向敲击和摩擦损失，还会影响气缸内的机油消耗和窜气。选取一台直列四缸共轨柴油发动机作为研究对象。基于活塞和气缸套温度场试验，建立了活塞组件的动力学仿真模型。研究了销孔偏移、缸套间隙和活塞裙部椭圆度对活塞二次运动的影响。基于表面响应法，估算了多个因素对摩擦功率损失和拍击能量的影响。结果表明：活塞的缸内应力状态会随其结构参数而变化，进而会影响活塞的二次运动。销孔偏移、缸套间隙、活塞裙部椭圆度以及后两者的相互作用对摩擦功率损失均有显著影响，而拍击能量受缸套间隙的影响显著。因此，可以根据显著性水平来设计参数，以优化活塞的二次运动特性。

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