吉林大学学报(工学版) ›› 2022, Vol. 52 ›› Issue (4): 773-780.doi: 10.13229/j.cnki.jdxbgxb20200895

• 车辆工程·机械工程 • 上一篇    

液压可变气门系统压力波动的影响分析

金兆辉1(),谷乐祺1,洪伟1,解方喜1(),尤田2   

  1. 1.吉林大学 汽车仿真与控制国家重点实验室，长春 130022
    2.长春职业技术学院 工程技术分院，长春 130033
  • 收稿日期:2020-09-07 出版日期:2022-04-01 发布日期:2022-04-20
  • 通讯作者: 解方喜 E-mail:jinzhaohui@jlu.edu.cn;xiefx2011@jlu.edu.cn
  • 作者简介:金兆辉（1988-），男，工程师，博士研究生. 研究方向：内燃机工作过程优化与控制.E-mail：jinzhaohui@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51876079);吉林省科技发展计划项目(20200403150SF);中央高校基本科研业务费专项资金项目;以汽车运动为导向的能源与动力工程专业“五育”并举式创新实践教学改革与探索(NSJZW2021Y-35)

Analysis on pressure fluctuation of hydraulic variable valve actuation

Zhao-hui JIN1(),Le-qi GU1,Wei HONG1,Fang-xi XIE1(),Tian YOU2   

  1. 1.State Key Laboratory of Automotive Simulation and Control，Jilin University，Changchun 130022，China
    2.Engineering Branch，Changchun University of Technology，Changchun 130033，China
  • Received:2020-09-07 Online:2022-04-01 Published:2022-04-20
  • Contact: Fang-xi XIE E-mail:jinzhaohui@jlu.edu.cn;xiefx2011@jlu.edu.cn

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摘要：

针对液压可变气门机构实际运行中系统会产生压力波动，影响可变气门机构的工作性能这一问题，分析了压力波动产生的原因，并采取了有效措施减小压力波动。通过试验及AMESim仿真探究了气门弹簧刚度、气门活塞质量、节流孔径大小等关键参数对系统压力波动的影响。研究表明：当气门落座速度小于0.5 m/s时，增大薄壁孔径可以有效减小压力波动；增加气门弹簧刚度可以减小压力波动幅值；减小气门活塞质量有利于减小压力波动；增大气门活塞直径，压力波动幅值明显减小，最大可减小2.719 MPa；减小系统液压油总容积，可减少压力波动次数。

关键词: 动力机械工程, 液压可变气门机构, AMESim, 压力波动, 气门落座速度, 气门运动特性

Abstract:

The pressure fluctuation of the hydraulic variable valve actuation system may be produced in the actual operation， which will affect the performance of the variable valve actuation. In this paper， the reason and trend of pressure fluctuation are analyzed by combining experiment and simulation， and effective measures are taken to reduce pressure fluctuation. It is found that the key parameters such as valve spring stiffness， valve piston mass and the diameter size of the thin-walled hole，all have effect on the system pressure fluctuation. The research shows that when the valve-seating velocity is less than 0.5 m/s， the pressure fluctuation can be effectively reduced by choosing a larger thin-walled hole. The pressure fluctuation amplitude can be reduced by increasing the valve spring stiffness. The pressure fluctuation can be decreased by reducing the valve piston mass. When the diameter of valve piston increases， the pressure fluctuation amplitude decreases significantly， which can be reduced by 2.719 MPa at most. By reducing the total hydraulic fluid volume of the system can reduce the number of pressure fluctuations.

Key words: dynamic mechanical engineering, hydraulic variable valve actuation, AMESim, hydraulic pressure fluctuation, valve-seating velocity, valve movement characteristics

中图分类号: 

  • TK417

图1

液压可变气门机构三维图"

图2

试验台架"

表1

试验设备"

名 称厂 家型 号
角标仪奇石乐2613B
差动位移传感器上海江晶翔电子KDW?25?V1
高速数据采集卡北京瑞博华RBH8362
压电式压力传感器奇石乐6067C1Q01
燃烧分析仪DEWETRON2010
变频器广州三晶电气SAJ8000
节流阀海德福斯NV10?22

图3

液压系统示意图"

图4

气门升程试验曲线"

图5

气门活塞腔压力试验曲线"

图6

AMESim仿真模型"

图7

在2400 r∕min工况下不同薄壁小孔孔径对应气门升程、气门腔压力和气门运动速度的曲线"

图8

在3600 r∕min工况下不同薄壁小孔孔径对应气门升程、气门腔压力和气门运动速度的曲线"

图9

不同气门弹簧刚度对应气门腔压力曲线"

图10

不同气门活塞质量对应气门活塞腔压力和气门升程曲线"

图11

不同气门活塞直径对应气门活塞腔压力、流量曲线和气门升程曲线"

图12

不同液压油总容积对应气门腔压力曲线"

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