熊培友，孙晓，邢小兵，王亮，李锋刚

(山东滨州渤海活塞股份有限公司，山东 滨州 256602）

摘要：本文通过运用AVL-PR活塞组件动力学分析软件对不同裙部结构刚度的某汽油机活塞进行了动力学模拟分析，研究了活塞三种不同裙部刚度对于活塞二阶运动以及敲击能量、摩擦损失等性能的影响，结果表明：结构B活塞裙部上部、中部和下部刚度相对于结构A分别减小后，裙部摩擦功率损失降低了约26%，结构C活塞裙部上部的刚度相对于结构B增大后，裙部摩擦损失会有所增大；此研究可以为汽油机活塞裙部结构的设计及优化提供参考。

关键词：活塞动力学；二阶运动；裙部结构；刚度

Abstract: Through applying the AVL EXCITE Piston&Rings software, gasoline engine piston stiffness distribution of different skirt structure is studied by piston dynamics simulation combined with experiment method, as well as the effect of three different piston structure on piston second movement kinetic energy and friction. The results show when the stiffness of structure B piston skirt upper, middle and lower relative to the structure A reduced, skirt friction loss reduced about 26%, and when the skirt upper stiffness of structure C increases relative to structure B, the skirt friction loss increased. This research can provide the reference for a gasoline engine piston skirt structure design and optimized.

Key words： Piston Dynamics；Second Motion；Skirt Structure；Stiffness