液压可变气门机构压力波动及动作循环变动  

Pressure fluctuation and cyclic variation of movement of hydraulic variable valve mechanism

作　　者：钟兵[1] 洪伟[1] 杨国志 苏岩[1] 赵平 王京春 解方喜[1] ZHONG Bing;HONG Wei;YANG Guo-zhi;SU Yan;ZHAO Ping;WANG Jing-chun;XIE Fang-xi(State Key Laboratory of Automobile Simulation and Control,Jilin University,Changchun 130022,China;Planning and Marketing Department,FAW Foundry Co.,Ltd.,Changchun 130062,China;Key Laboratory of Bionic Engineering,Ministry of Education,Jilin University,Changchun 130022,China;College of Biological and Agricultural Engineering,Jilin University,Changchun 130022,China)

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022 [2]一汽铸造有限公司规划与市场部,长春130062 [3]吉林大学工程仿生教育部重点实验室,长春130022 [4]吉林大学生物与农业工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2020年第3期796-803,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51876079);吉林省科技发展计划项目(20170101132JC,20170101131JC,20180201008GX);吉林省教育厅“十三五”科学研究项目(JJKH20180141KJ,JJKH20170794KJ).

摘　　要：基于连续可变凸轮驱动液压可变气门机构,研究了倒拖转速、节流阀开度等参数对压力波动及气门动作循环变动的影响,并给出了降低气门动作循环变动措施。研究发现:气门腔压力为低频基振,倒拖转速增大,低频基振之上叠加了高频谐振,导致液压波动。节流阀开度增大,气门腔压力和压力波动幅值均减小,且波峰波谷出现时刻滞后。倒拖转速升高,波峰值增大,波谷值降低,压力波动幅值增大,且波峰波谷数量减少。节流阀全关时,最大升程循环变动(COVML)小于1%;保持倒拖转速不变,随着节流阀开度的增大,COVML增大;随着倒拖转速的增大,COVML减小。保持节流阀开度不变,COVML随液压油温度的升高而增大;节流阀开启后,不同供油压力下COVML相差不大。缩短回油管路后,节流阀开启时的最大升程循环变动相较于全关时略有增大,不同节流阀开度相差较小且均小于1.5%。For continuously variable cam driving hydraulic valve mechanism,the effects of motoring speed and throttle valve opening on pressure fluctuation and cyclic variation of valve movement were studied experimentally,and the measure to reduce cyclic variation were given.The results show that when the pressure in the valve chamber is low frequency base vibration,high frequency resonance is superimposed on the low frequency vibration and motoring speed increases,the hydraulic pressure will fluctuate. As thethrottle valve opening increases, the pressure and pressure fluctuation amplitude in valve chamberdecrease,and the time lag of peak and valley appears. As the speed increases,the wave peak valueincreases and the valley value decreases respectively,the pressure fluctuation amplitude increases,and thenumber of wave peak and valley is reduced. When the throttle valve is completely closed,the cyclicvariation of maximum lift(COVML) is less than 1%,and it increases with the throttle valve openingunder the same speed. As the speed increases,the COVML decreases accordingly. Under the same throttlevalve opening,the COVML increases with the raise of oil temperature. After the throttle valve is opened,the change of COVML is small with different oil supply pressure. If the return pipeline is shorten,theCOVML of opened throttle valve is slightly larger than that of closed throttle valve,and the difference ofdifferent throttle valve opening is less than 1.5%.

关 键 词：动力机械工程 液压可变气门 气门动作 压力波动 循环变动 回油管路 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]