重型AT换挡控制油压变化及稳定性的研究
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摘要
为了改善和保证重型液力自动变速器的换挡品质,在分析重型液力自动变速器换挡液压控制系统工作原理的基础上,建立换挡回路油压控制数学模型,基于AMESim搭建仿真模型,并从占空比、换挡阀弹簧预紧力和阀口开口量等因素对换挡时离合器油压变化及稳定性展开研究。仿真结果显示:换挡时间约为1.6 s,在t=1～1.6 s期间,这些因素对离合器油压影响较大,而后离合器的油压仅受主油压调节而发生变化,t=3.2 s达到稳定压力,满足实际工作要求;同时仿真结果与理论分析相一致,验证了模型的正确性和有效性,为液力自动变速器换挡控制和装配提供一定的参考。
In order to improve and guarantee the shift quality of heavy-duty automatic transmission,based on the analysis of system operation principles of heavy-duty automatic transmission shift hydraulic control system, the mathematical model of the hydraulic control system was established firstly, and then the simulation model was set up based on AMESim, and the change and stability of clutch hydraulic pressure were studied from those important factors including duty cycle, shift valve spring preload and the opening of shift valve. The simulation results show that the shift time is about 1.6 s, these factors have a great impact on the clutch hydraulic pressure when t=1～1.6 s, then the clutch hydraulic pressure is influenced only by the main oil change; when t=3.2 s,stable pressure is reached which meets the actual job requirements. At the same time the simulation results consistent with the theoretical analysis, verifying the correctness and validity of the model.It provides some reference for gear shift control, assembly and oil temperature control of automatic transmission.
In order to improve and guarantee the shift quality of heavy-duty automatic transmission,based on the analysis of system operation principles of heavy-duty automatic transmission shift hydraulic control system, the mathematical model of the hydraulic control system was established firstly, and then the simulation model was set up based on AMESim, and the change and stability of clutch hydraulic pressure were studied from those important factors including duty cycle, shift valve spring preload and the opening of shift valve. The simulation results show that the shift time is about 1.6 s, these factors have a great impact on the clutch hydraulic pressure when t=1～1.6 s, then the clutch hydraulic pressure is influenced only by the main oil change; when t=3.2 s,stable pressure is reached which meets the actual job requirements. At the same time the simulation results consistent with the theoretical analysis, verifying the correctness and validity of the model.It provides some reference for gear shift control, assembly and oil temperature control of automatic transmission.
引文
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[9] 张涛,陈慧岩.基于AMESim的HD4070PR自动变速器主调压阀仿真分析[J].机床与液压,2010,38(19):105-107.ZHANG T,CHEN H Y.Simulation Analysis of the Main Pressure Regulation Valve of HD4070PR Automatic Transmission Based on AMESim[J].Machine Tool & Hydraulics,2010,38(19):105-107.
[10] 万国强,黄英,张付军.液力自动变速器换挡过程标定方法研究[J].兵工学报,2012(2):142-148.WAN G Q,HUANG Y,ZHAGN F J,et al.Research the Calibration Method for Gear shifting of Automatic Transmission[J].Acta Armamentarii,2012(2):142-148.
[11] 赵鑫鑫,杨钰,张静,等.液力自动变速器换挡过程反演优化控制[J].农业工程学报,2016(1):26-31.ZHAO X X,YANG Y,ZHANG J,et al.Optimizing Gear Shifting Quality with Backstepping Control for Automatic Transmission[J].Transactions of the Chinese Society of Agricultural Engineering,2016(1):26-31.
[2] ZHANG Q H,XIONG W,WANG H T,et al.Research on Pressure Characteristics of a Vehicle Shift Hydraulic System Based on AMESim[C]//Proceeding of Chinese Control Conference,2017:10486-10489.
[3] 张英锋,王迎,庞海龙,等.基于AMESim的大功率自动变速器换挡电磁阀的仿真研究[J].汽车工程学报,2014,4(4):267-273.ZHANG Y F,WANG Y,PANG H L,et al.Solenoid Valve Simulation Study for High-Power Automatic Transmission Based on AMESim[J].Chinese Journal of Automotive Engineering,2014,4(4):267-273.
[4] 唐治,陈慧岩.自动变速器液压系统动态响应特性实验研究[J].液压与气动,2015(8):44-46.TANG Z,CHEN H Y.An Experiment on Dynamic Characteristics of Hydraulic System for a Automatic Transmission[J].Chinese Hydraulics & Pneumatics,2015(8):44-46.
[5] JIAN H C,WEI W,LI H C,et al.Optimization of a Pressure Control Valve for High Power Automatic Transmission Considering Stability[J].Mechanical Systems and Signal Processing,2018,101:182-196.
[6] BALAU A E,CARUNTU C F,LAZAR C.Simulation and Control of an Electro-hydraulic Actuated Clutch[J].Mechanical Systems & Signal Processing,2011,25(6):1911-1922.
[7] SEYDEL R.Practical Bifurcation and Stability Analysis[M].Springer Science & Business Media,2009.
[8] 祝胜,吴光强.液力机械式自动变速器换挡过程最优控制仿真研究[J].机械传动,2014,38(9):15-19.ZHU S,WU G Q.Research and Simulation of Optimal Shift Control of Hydraulic Automatic Transmission[J].Journal of Mechanical Transmission,2014,38(9):15-19.
[9] 张涛,陈慧岩.基于AMESim的HD4070PR自动变速器主调压阀仿真分析[J].机床与液压,2010,38(19):105-107.ZHANG T,CHEN H Y.Simulation Analysis of the Main Pressure Regulation Valve of HD4070PR Automatic Transmission Based on AMESim[J].Machine Tool & Hydraulics,2010,38(19):105-107.
[10] 万国强,黄英,张付军.液力自动变速器换挡过程标定方法研究[J].兵工学报,2012(2):142-148.WAN G Q,HUANG Y,ZHAGN F J,et al.Research the Calibration Method for Gear shifting of Automatic Transmission[J].Acta Armamentarii,2012(2):142-148.
[11] 赵鑫鑫,杨钰,张静,等.液力自动变速器换挡过程反演优化控制[J].农业工程学报,2016(1):26-31.ZHAO X X,YANG Y,ZHANG J,et al.Optimizing Gear Shifting Quality with Backstepping Control for Automatic Transmission[J].Transactions of the Chinese Society of Agricultural Engineering,2016(1):26-31.