摘要
电液可变气门液压系统的稳定性对发动机的燃烧排放具有重要意义。文章针对自主研发的某型号船用柴油机的电液可变气门系统,建立压力波动的评价体系,通过试验与仿真,分析供油压力P0(10~13 MPa)与电磁阀的开启相位β(317~322℃A)的耦合对电磁阀前液压油路压力波动的影响。电磁阀前液压油路压力曲线的瞬时压力变化量的波动曲线拐点处的特征值Pa-e与特征相位βa-e受供油压力和电磁阀开启相位的影响结果是:Pa、Pc、Pe的幅值不受电磁阀开启相位的影响,Pb和Pd的幅值随电磁阀开启相位的延迟而增加;Pa、Pc、Pe的增幅随供油压力的增加而增加,Pb和Pd的降幅随供油压力的增加而增加;βa-e之间的间隔差值几乎不受供油压力的影响且与电磁阀开启相位的间隔差值几乎一致,不受电磁阀开启相位的影响。
The stability of the electro-hydraulic variable valve hydraulic system is of great significance to the combustion and emissions of the engine.Therefore,in view of a certain type electro-hydraulic variable valve system developed dependently for marine diesel engine,this paper established the evaluation system of pressure fluctuation,and analyzed the influence of coupling of oil supply pressure P0(10 to 13 MPa) and electromagnetic valve opening phase β(317~322 ℃A) on pressure fluctuations through the experiment and simulation.The characteristic value Pa-e and characteristic phase βa-e at the inflection point of the instantaneous pressure change curve of the hydraulic oil circuit pressure curve in front of the solenoid valve are affected by the supply pressure and the opening phase of the solenoid valve.The results show that the amplitudes of the characteristic parameters of pressure fluctuation,Pa, Pc and Pe, are not affected by the opening phase of the solenoid valve.The amplitudes of Pb and Pd increase with the delay of the opening phase of the solenoid valve.With the increasing of pressure fluctuation characteristic parameters Pa,Pc and Pe increases with the increase of oil supply pressure,and the decrease of pressure fluctuation characteristic parameters Pb and Pd increases with the increase of oil supply pressure.The interval difference between characteristic phase βa-e is almost independent of the oil supply pressure and almost identical to the interval difference between the opening phases of the solenoid valve.
作者
韩志强
姚乙鹏
王钰鑫
田维
赵家辉
HAN Zhiqiang;YAO Yipeng;WANG Yuxin;TIAN Wei;ZHAO Jiahui(School of Automobile&Transportation,Xihua University,Chengdu 610039 China;Key Laboratory of Fluid and Power Machinery,Ministry of Education,Xihua University,Chengdu 610039 China;Shanghai Marine Diesel Engine Research Institution,Shanghai 201108 China)
出处
《西华大学学报（自然科学版）》
CAS
2020年第4期79-88,共10页
Journal of Xihua University:Natural Science Edition
基金
国家自然科学基金资助项目(51776177)
四川省教育厅项目(13ZB0022)
教育部春晖计划项目(Z2014059)。
关键词
电液可变气门系统
压力波动
拐点
参数耦合
幅值与相位差
electro-hydraulic variable valve system
pressure fluctuation
inflection point
coupling parameters
amplitude and phase difference
