Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (4): 773-780.doi: 10.13229/j.cnki.jdxbgxb20200895

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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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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

CLC Number: 

  • TK417

Fig.1

Three-dimensional model of cam-driven hydraulic variable valve actuation"

Fig.2

Configuration of the testbed"

Tab 1

Test equipment"

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

Fig.3

Schematic diagram of hydraulic system"

Fig.4

Experimental curves of valve lift"

Fig.5

Experimental curves of valve piston cavity pressure"

Fig.6

AMESim simulation model"

Fig.7

Distribution of different thin-walled hole diameter to valve lift， valve piston cavity pressure and valve?seating velocity at 2400 r∕min"

Fig.8

Distribution of different thin-walled hole diameter to valve lift， valve piston cavity pressure and valve-seating velocity at 3600 r∕min"

Fig.9

Distribution of different valve spring stiffnesses corresponding to valve piston cavity pressure"

Fig.10

Distribution of different valve piston masses corresponding to valve piston cavity pressure and valve lift"

Fig.11

Distribution of different valve piston diameter corresponding to valve piston cavity pressure， valve piston cavity flow and valve lift"

Fig.12

Distribution of different hydraulic oil total volumes corresponding to valve piston cavity pressure"

1 Tong S, Li X, Liu S, et al. Effect of two-stage valve lift for fuel economy and performance on a PFI gasoline engine[C]∥SAE Paper, 2014-01-2874.
2 Xu J T, Chang S Q, Fan X Y, et al. Effects of electromagnetic intake valve train on gasoline engine intake charging[J]. Applied Thermal Engineering, 2016, 96: 708-715.
3 Knop V, Mattioli L. An analysis of limits for part load efficiency improvement with VVA devices[J]. Energy Conversion and Management, 2015, 105: 1006-1016.
4 Liang L, Luo X H, Liu Y S, et al. A numerical investigation in effects of inlet pressure fluctuations on the flow and cavitation characteristics inside water hydraulic poppet valves[J]. International Journal of Heat and Mass Transfer, 2016, 103: 684-700.
5 Lu X X, Wang D M, Shen W, et al. Experimental investigation of the propagation characteristics of an interface wave in a jet pump under cavitation condition[J]. Experimental Thermal and Fluid Science, 2015, 63: 74-83.
6 陈飞. 全可变液压气门系统的建模仿真与试验研究[D]. 济南: 山东大学机械工程学院, 2018.
Chen Fei. Simulation and experiment research of a fully variable hydraulic valve system[D], Jinan: College of Mechanical Engineering, Shandong University, 2018.
7 韩志强,胡明艳,赵家辉,等. 电液可变气门系统液压油路瞬时压力的分析[J]. 内燃机工程, 2019, 40(2): 82-91.
Han Zhi-qiang, Hu Ming-yan, Zhao Jia-hui, et al. Analysis of instantaneous pressure of hydraulic circuit in electro-hydraulic variable valve timing system[J]. Chinese Internal Combustion Engine Engineering, 2019, 40(2): 82-91.
8 谢宗法, 秦磊, 王志明, 等. 全可变气门机构中的液压压力波动现象[J]. 内燃机学报, 2011, 29(5): 455-460.
Xie Zong-fa, Qin Lei, Wang Zhi-ming, et al. Hydraulic pressure fluctuation in fully variable valve train[J]. Transactions of CSICE, 2011, 29(5): 455-460.
9 钟兵, 洪伟, 杨国志, 等. 液压可变气门机构压力波动及动作循环变动[J]. 吉林大学学报: 工学版, 2020, 50 (3): 796 - 803.
Zhong Bing, Hong Wei, Yang Guo-zhi, et al. Pressure fluctuation and cyclic variation of movement of hydraulic variable valve mechanism[J]. Journal of Jilin University (Engineering and Technology Edition), 2020, 50(3): 796- 803.
10 钟兵, 洪伟, 金兆辉, 等. 进气门早关液压可变气门机构运动特性[J]. 吉林大学学报: 工学版, 2018, 48(3): 727-734.
Zhong Bing, Hong Wei, Jin Zhao-hui, et al. Movement characteristics of hydraulic variable valve train with early intake valve closing[J]. Journal of Jilin University (Engineering and Technology Edition), 2018, 48(3): 727-734.
11 解方喜, 钟兵, 杨国志, 等. 凸轮驱动式液压可变气门机构设计及运动特性[J]. 汽车工程, 2020, 42(3): 307-314.
Xie Fang-xi, Zhong Bing, Yang Guo-zhi, et al. Design and motion characteristics of cam-driven hydraulic variable valve mechanism[J]. Automotive Engineering, 2020, 42(3): 307-314.
12 Jin Z H, Hong W, You T, et al. Effect of multi-factor coupling on the movement characteristics of the hydraulic variable valve actuation[J]. Energies, 2020, 13(11): 2870.
13 ZlobinA V, Tarasevich S É. Hydraulic resistance of pipes with uniform continuous roughness of varying profile[J]. Journal of Engineering Physics and Thermophysics, 2020, 93(3): 725-732.
14 Boretti Alberto. Use of variable valve actuation to control the load in a direct injection, turbocharged, spark-ignition engine[C]∥SAE Paper, 2010-01-2225.
15 宋佳彬. 变刚度气门弹簧设计方法研究[D]. 长春:吉林大学汽车工程学院, 2018.
Song Jia-bin. Research on design method of variable stiffness valve spring[D]. Changchun: College of Automotive Engineering, Jilin University, 2018.
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