二阶运动对汽油机活塞可靠性影响的研究  

Research for Influence of Piston Secondary Motion on Gasoline Piston Reliability

作　　者：柳隽卓 LIU Junzhuo(MAHLE Automotive Technologies(China)Co.,Ltd.,Shanghai 201401)

机构地区：[1]马勒汽车技术(中国)有限公司

出　　处：《内燃机》2019年第4期36-39,共4页Internal Combustion Engines

摘　　要：传统的汽油机活塞计算,加载的机械载荷包括爆发压力,惯性力和侧向力。但在实际的活塞运行中,由于活塞和缸壁之间设计间隙以及热膨胀的存在,活塞在上下往复运动的过程中,会发生以活塞销为轴心的摆动,即活塞的二阶运动。本文讨论了考虑活塞二阶运动对汽油机活塞尤其是活塞裙部可靠性的影响。仿真计算结果与实验结果的对比表明,考虑活塞二阶运动的活塞寿命计算,更加全面的模拟了活塞在发动机运行中的情况,从而使得仿真结果更加准确可信。Traditional gasoline piston calculation, the mechanical loads include cylinder pressure, inertia force and lateral force.However, in practical uses, due to the clearance between piston and cylinder wall and thermal expansion, the piston rotates with the pin as the axis, which is called piston secondary motion. The influence of piston secondary motion to the gasoline piston, especially to the reliability on piston skirt area is studied in this paper. The comparison of simulation result with test result proves that the simulated fatigue result with consideration of piston secondary motion is more accurate and reliable.

关 键 词：活塞 汽油机 可靠性 二阶运动 裙部 

分 类 号：TK413[动力工程及工程热物理—动力机械及工程]