【作者】 张煜；

【导师】 雷雨龙；

【作者基本信息】 吉林大学 ， 车辆工程， 2012， 硕士

【摘要】 石油资源的日趋枯竭，温室效应、空气质量等环境问题的日益严重，使汽车工业的发展正面临着越来越严重的考验。电动汽车因具有低污染、低噪声、能量效率高、能量来源多样化的特点，使得开发以电动汽车为代表的各种新能源汽车，成为解决汽车带来的诸多问题的有效途径。随着越来越多的纯电动汽车以大功率商用车辆作为发展出口，高效的大功率动力传动技术已经成为纯电动汽车需要着重研究的关键技术之一。自动变速技术在纯电动车辆中的引入，能够大幅提升汽车的动力性能，有效的增大系统的能源利用效率，从而提高对于纯电动汽车最为重要的续航能力。作为电动汽车驱动技术的关键环节，自动变速系统的优劣对整车性能将产生至关重要的影响。所以，开发符合纯电动车的自动变速系统，如何通过有效的控制技术帮助电动汽车在各项性能上能有很大的上升，使其具有很强的实用性并且能够实现产业化的发展，是本文研究的意义所在。本文以纯电动客车为基础车型，以驱动电机主动同步的自动变速系统为研究对象，进行了下面各方面的研究：（1）自动变速系统的结构特性及参数匹配分析首先对纯电动车的自动变速系统的结构特点和工作原理进行介绍，然后重点说明换挡执行机构的控制原理。根据汽车理论及整车参数和性能指标，分析自动变速系统的挡位和速比的选择对汽车行性能的影响，并根据匹配原则，针对本文所研究的系统进行匹配计算。（2）纯电动车自动变速系统换挡规律换挡规律是自动变速器控制策略最为核心的技术，它决定了动力传动系统性能的发挥程度，选择理想的换挡时刻和合理的挡位，对车辆的动力性、经济性及舒适性有很大影响。纯电动汽车的驱动电机与发动机在特性上的巨大差异，使得各自的换挡规律也有明显的不同。针对纯电动车的换挡规律进行研究，分别分析并设计出纯电动车辆的最佳动力性和最佳经济性换挡规律，并研究了负载识别技术，分析了负载变化对换挡规律的影响，在此基础上，制定出基于工况识别的自动变速系统综合换挡规律。（3）换挡过程分析及系统综合控制策略自动变速系统的控制策略主要分为换挡规律、换挡过程控制及综合管理策略，对驱动电机主动同步的自动变速系统的换挡过程进行建模分析，以便明确换挡过程特性和相应的控制要求，在此基础上，以模块化、层次化的思想设计自动变速系统的综合控制策略。（4）自动变速系统台架及整车试验首先介绍了控制系统的硬件及软件开发平台，为了验证换挡规律、控制策略及本系统方案的有效性，搭建试验台架，并进行功能性试验，然后将自动变速系统装载到纯电动大客车上进行实车试验，并分析试验数据。更多还原

【Abstract】 For petroleum resources are becoming depleted, and the greenhouse effect, air qualityand other environmental problems are becoming increasingly serious, the development of theautomobile industry is facing a more and more serious test. Electric vehicle is therepresentative of a variety of new energy vehicles and it has many advantages such as lowpollution, low noise, high energy efficiency, diversification of sources of energy, whichmakes the development of the electric vehicle as an effective way to solve the manyproblems brought about by car.With the growing number of pure electric vehicle with high power commercial vehiclebecoming the development outlet, efficient transmission technology of large power hasbecome one of key technologies which need to focus on research in pure electric vehicles.The introduction of automated transmission technology in pure electric vehicles cansignificantly enhance the car’s dynamic performance, and effectively increase the energyutilization efficiency of the system, thereby improving the endurance ability which is themost important for pure electric car. As a key link in electric vehicle driving technology, thequality of automated transmission system will have a crucial impact on vehicle performance.Therefore, in line with the development of pure electric vehicle automated transmissionsystem, how to use effectively control technology to make electric vehicle have considerableupside in the performance has become a technology barrier. It hinders electric vehicles todevelop into a realizable industry with strong practicability. How to solve the problem is alsothe significance of this study.In this paper, with a motor driving synchronous automated transmission system basedon a pure electric bus as the research object, I studied the following aspects:(1) Automated transmission system structure characteristics and analysis of parametermatching.Firstly, structure characteristics and working principles of pure electric vehicle automated transmission system are introduced. And then it focused on the description ofshift actuator control principle. According to the theory of automobile and vehicleparameters as well as performance index, It is carried out to analyze the effectionof the automated transmission gear and the speed ratio selection on the performance. And inaccordance with the principle of matching, the matching calculation for the system is carriedout too in this paper.(2) Automated transmission system shift schedule forl electric velicle.Shift schedule are most core technologies of automated transmission control strategy,which determines the level of dynamic performance of transmission systems play. Select theideal shift points and a reasonable amount of gear have a big impact on power, economy andcomfort of the vehicle. There are differences on the characteristics between pure electricvehicle driving motor and engine. Their shift schedule is also significantly different. Studyof shift schedule for pure electric vehicles, analysis and design of electric vehicle optimalpower performance and the best economic shift, respectively, and study load identificationtechnology, analysis of the impact of load changes swap block rule. on this basis of these,develop a automated transmission system shift schedule based on condition recognition.(3) Shifting process analysis and comprehensive control strategies.The comprehensive control strategies of automated can be divided into shift, shiftingprocess control and integrated management strategies. Modeling and analysis of Shiftprocess of automated transmission on active synchronization of driving motor have beenmodel and analysis in order to make definite shift process characteristics and correspondingcontrol requirements. On this basis, design the automated control strategy with a modular,hierarchical thing.(4) Bench and vehicle testing for automated transmission system.Firstly, introduce the hardware and software development platform of the controlsystem. Then, build a test bench and do some functional testing in order to verify the shift,control strategies and effectiveness of this system. The last is mounting the automatedtransmission system on a pure electric bus for vehicle test and data analyzing.更多还原