8速双离合自动变速器液压控制系统多阀组交互影响研究

发布时间：2018-04-23 04:07

本文选题：双离合自动变速器 + 液压控制系统　；参考：《合肥工业大学》2016年硕士论文

【摘要】：自动变速器是除发动机之外汽车动力系统最核心的部件,而液压控制系统则是电控液动自动变速器实现可靠自动变速的关键所在,对此,基于合肥工业大学汽车工程技术研究院自主研发的八速新型双离合自动变器项目,对变速器液压控制系统进行了较为系统完善的研究。研究内容如下：(1)分析了双离合器自动变速器机械、液压和电控等模块的工作原理,提出液压控制系统方案；(2)基于AMESim分别对液压系统换挡控制模块和离合器控制模块进行理论分析和数学建模仿真,以单模块为节点分析多个节点同时工作时,各节点油压、流量相互之间的影响,为液压系统最大工况下所需供油量和压力提供参考依据,为系统液压动力源的设计提供合理可行的设计方案；(3)从电磁阀自身关键结构参数和PWM控制信号两个方面进行了详细分析,提出优化比例控制功能和有效拓宽电磁阀有效工作占空比范围的方法,其中通过改变驱动信号低电平Vmin能够有效优化高速开关阀的有效占空比范围,为进一步提高液压系统控制精度提供依据；(4)制定液压系统验证试验方案,完成液压系统二轮阀体的结构设计,及三维模型建立,样品加工和装配,完成初步验证工作。对自动变速器液压控制系统有了较全面的研究,为正向自主研发变速器液压控制系统奠定了基础。
[Abstract]:Automatic transmission is the core component of automobile power system except engine, and hydraulic control system is the key to realize reliable automatic transmission. Based on the eight speed double clutch automatic changer project developed by the Automotive Engineering Technology Research Institute of Hefei University of Technology, the hydraulic control system of transmission is studied systematically. The contents of the study are as follows: 1) the working principle of the mechanical, hydraulic and electric control modules of the dual clutch automatic transmission is analyzed. This paper presents a hydraulic control system scheme: based on AMESim, the hydraulic system shift control module and clutch control module are analyzed in theory and mathematical modeling simulation. The oil pressure of each node is analyzed when the single module is used as the node to work at the same time. The influence of flow rate provides a reference basis for the required oil supply and pressure under the maximum working condition of hydraulic system. This paper provides a reasonable and feasible design scheme for the design of the hydraulic power source of the system. The key structural parameters of the solenoid valve and the PWM control signal are analyzed in detail. The method of optimizing proportional control function and widening the effective duty cycle range of solenoid valve is put forward, in which the effective duty cycle range of high speed switch valve can be effectively optimized by changing the driving signal low level Vmin. In order to further improve the control accuracy of hydraulic system, we can make the test scheme of hydraulic system verification, complete the structure design of the two-wheel valve body of hydraulic system, establish the three-dimensional model, process and assemble the sample, and finish the preliminary verification work. The hydraulic control system of automatic transmission is studied comprehensively, which lays a foundation for developing the hydraulic control system of transmission.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.221

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