摘要
对发动机配气机构及其关键部件液压间隙调节器的组成与工作原理进行了介绍,并利用AMESim软件搭建液压间隙调节器模型,给定凸轮转速输入信号,凸轮升程段工作路径与液压间隙调节器受力、位移、过流及高压腔压力的变化趋势一致,从而验证了模型的正确性。分析油液含气量、高压腔死区容积、油温、机油牌号对液压间隙调节器工作特性的影响,结果表明:随着油液中含气量的增加,气门位移减小;高压腔死区容积减小,气门位移的随动响应性有所提升;随着油温的升高,油液的粘度减小,泄漏量增加,从而导致气门位移减小;随着机油高温运动粘度的升高,相应运动粘度等级随之提升,油液泄漏量减少。
This paper introduced the composition and working principle of the valve train and hydraulic lash adjuster of the engine,and used AMESim software to build the hydraulic lash adjuster model.Given the input signal of the cam speed,the working path of the cam lift section was consistent with the changing trend of the force,displacement,overcurrent and pressure in the high-pressure chamber of the hydraulic lash adjuster,thus verifying the correctness of the model.The paper also analyzed the influence of oil gas content,dead zone volume of high pressure chamber,oil temperature and oil grade on the working characteristics of hydraulic lash adjuster.The results show that the valve displacement decreases with the increase of oil gas content;the dead zone volume of high pressure chamber decreases,and the follow-up response of valve displacement improves;with the increase of oil temperature,the viscosity of oil decreases and the leakage increases,which leads to the decrease of valve displacement;with the increase of the high temperature kinematic viscosity of the engine oil,the corresponding kinematic viscosity grade will increase and the oil leakage will decrease.
作者
陈健
吴建亮
马家忠
袁飞
张兵
Chen Jian;Wu Jianliang;Ma Jiazhong;Yuan Fei;Zhang Bing(Jiangsu SUMEC Electromechanical Technology Co.,Ltd.,Nanjing 211599;Jiangsu University,Zhenjiang 212013)
出处
《汽车工程师》
2023年第1期38-43,共6页
Automotive Engineer
基金
国家自然科学基金项目(51805215)。
