摘要
乘用车发动机硅铝合金活塞裙部承载能力已趋于极限状态,合理的活塞裙部结构设计可以改善发动机的舒适性、经济性、可靠性、安全性。利用活塞裙部刚度变形系数作为评价准则,并与FEA分析和刚度测试试验相结合,是实现活塞轻量化设计的有效途径。研究表明:合理的调整裙部下端区域的刚度可以增大活塞的安全储备;减小裙部刚度可有效降低裙部接触压力,但活塞摆角和敲击动能都有不同程度的增大,设计时需要针对发动机不同性能的权重要求进行权衡。
Nowadays in passenger car, the gasolme to get the expectant almost reached its material extreme, so the skirt structure should be designed reasonably engine performance i. e. comfortable, economical, reliability and safety. Skirt stiffness matrix evaluation criterion was set up,combined with FEA analysis method and stiffness measurement test to realize effectively the lightweight skirt design. It is concluded that larger piston safety margin can be achieved by modifying reasonably skirt lower-end stiffness, Lower skirt stiffness may quite reduce skirt contact force, but piston tilting angle and kinetic energy increase by different degrees. Optimization of the piston skirt stiffness should be considered based on trade-off of engine performance requirements.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2013年第5期57-61,共5页
Chinese Internal Combustion Engine Engineering
基金
山东省自然科学基金资助项目(ZR2010EM070)
山东省高等学校科技计划资助项目(J10LD62)
关键词
内燃机
活塞
裙部
刚度矩阵
评价
IC engine
piston
skirt
stiffness matrix evalution
