摘要
针对可变气门正时(VVT)在整车运行过程中出现进气侧信号输出不合理问题,通过尺寸测量、金相分析、打滑力矩试验、高压脉动试验等手段确定失效的根本原因,采取增加壳体壁厚及增加壳体叶片摩擦纹等设计改进措施,提升VVT打滑力矩,打滑力矩中位数从213Nm提升至363.5Nm,提升70.66%,解决了VVT信号输出不合理问题。
In view of the VVT appeared in the process of vehicle running inlet side signal output is not reasonable,through the size measurement,metallographic analysis,skid torque test,high pressure pulsation test methods to determine the root cause of the failure,to increase the shell wall thickness and the increase of leaf design improvement measures,such as friction grain ascension VVT skid moment,solve the problem of the VVT signal output is not reasonable.
作者
王洪勃
莫福广
黄武居
Wang Hong-bo;Mo Fu-guang;Huang Wu-ju(SAIC GM Wuling Automobile Co.,Ltd.,Liuzhou 545007,China)
出处
《内燃机与配件》
2022年第15期34-36,共3页
Internal Combustion Engine & Parts
关键词
VVT
打滑力矩
高压脉动
摩擦纹
VVT
Sliding torque
High pressure pulsation
Friction grain
