摘要
基于自主研制的电液式可变气门系统研究了关键参数对气门升程曲线瞬时变化的影响,通过采用特征点来描述气门升程曲线的特征变化,为参数选取提供理论支撑。研究表明:进油相位对特征相位β_(d)和β_(g)的影响都存在临界值,且特征相位β_(d)和β_(g)随供油压力增大而提前;特征相位β_(d)不受泄油相位的影响,而泄油相位对特征相位β_(g)的影响存在拐点;特征相位β_(d)和β_(g)都随凸轮转速的增加而延迟。
Based on the self-developed electro-hydraulic variable valve system,the influence of key parameters on transient change of electro-hydraulic variable valve lift curve was studied.The characteristic points were used to describe the characteristic changes of valve lift curve to provide theoretical support for parameter selection.The research results show that there is a critical value for the influence of fuel intake phase on characteristic phases of β_(d) and β_(g) and the characteristic phases advance with the increase of fuel supply pressure.Meanwhile,the characteristic phase of β_(d) is not affected by the oil discharge phase,but the oil discharge phase affects the characteristic phase of β_(d) with an inflection point.Both the characteristic phases of β_(g) and β_(g) delayed with the increase of speed.
作者
刘杰
刘智
田维
韩志强
LIU Jie;LIU Zhi;TIAN Wei;HAN Zhiqiang(Fluid and Power Machinery Key Laboratory of Ministry of Education,Xihua University,Chengdu 610039,China)
出处
《车用发动机》
北大核心
2023年第6期47-53,89,共8页
Vehicle Engine
基金
国防科技重点实验室基金项目(2022-JCJQ-LB-062-0102)
四川省科技计划项目(四川省自然科学基金青年科学基金)(2023NSFSC0836)
教育部“春晖计划”合作科研项目(HZKY20220586,HZKY20220569)。
关键词
可变气门
特征相位
气门升程
variable valve mechanism
characteristic phase
valve lift curve
fuel supply pressure
