【作者】 伊海霞；

【导师】 杨正林；

【作者基本信息】 南京航空航天大学 ， 车辆工程， 2009， 硕士

【摘要】 在国外纷纷开发混合动力汽车以实现节能减排的大背景下,本文依托国家863项目,基于轻型商用车平台进行混合动力技术的研究,文章主要进行了以下研究工作:(1)首先介绍国内外混合动力汽车的发展现状和分类,对混合动力汽车的各种动力系统方案的优缺点进行了详细的分析,阐述了本课题研究的背景和必要性,为本文混合动力系统方案的确定奠定了基础。(2)在综合考虑项目所开发车型的需求、各种动力系统方案的优缺点、企业现有技术积累等因素的基础上确定了动力系统技术方案。对动力耦合机构进行了分析和选型,并进行了动力系统的概念设计。根据样车的各项设计指标,对动力系统关键部件进行了选型和参数设计。(3)对动力系统的关键部件——耦合器的行星轮耦合机构及电液控制系统的特性进行了分析,并在此基础上建立了行星轮耦合机构和电液控制系统的数学模型,借助该模型进行仿真分析,为整车模型的建立和控制策略的设计做了准备。(4)在理论分析和试验数据的基础上建立混合动力系统的各部件模型。根据行星轮耦合机构的特性和动力系统的特点设计了混合动力系统的基于车速、油门开度和电池SOC值的AMT三参数换挡规律及整车控制策略。依据在Matlab/Simulink环境下建立的样车的前向仿真模型,对控制策略进行了仿真研究。仿真结果表明所设计的整车控制策略具有较好的控制和节能效果。(5)根据项目的研发进度,建立了耦合器特性试验台,对动力系统的关键部件——行星轮耦合机构的稳态特性和动态特性进行了试验研究。试验结果表明文章中对行星轮耦合机构的理论分析和模型仿真的结果与试验结果能够较好地吻合,故该模型可以用于行星轮耦合并联型动力系统的匹配和仿真分析。更多还原

【Abstract】 Energy-saving and environmental protection is the focus of the current development of automotive technology. Electric vehicles and hybrid electric vehicles become to the mainstream of the energy-saving and environmental protection vehicles. This paper presented my research on the drive train of the hybrid electric light commercial vehicle which relied on the national 863 project. The main contents of this paper are as follows:(1) The history, research status and categories of the hybrid vehicles were described in this paper. Based on a detailed analysis of the advantages and disadvantages of different hybrid power systems, this paper explained the background of this research project.(2) By studying on the market needs, advantages and disadvantages of different drive-train structures and existing technology accumulation in the company which undertaken the project, the power-train system for the 863 project was designed in this paper. The key components were analysised and designed to match the vehicle design target.(3) The characteristic of coupling device and its electro-hydraulic control unit were discussed in the article. The simulation models of the two compents were established and simulated. Through the analysis and simulation was provided the academic base for the research of the forward vehicle model and the design of vehicle control unit.(4) On the basis of sufficiently research on theoretical and experimental data, models of the key components and driver model were advanced in this paper. The three parameter shift schedule of AMT, which is based on speed, throttle and SOC, was introduced. The control strategy was designed, and the vehicle’s forward model was built in Matlab/Simulink to access the performance of control strategy. The test results show that the performance of designed control system meets the design requirements, and the vehicle has a substantial increase in economic performance.(5) According to the plans of the project, the test-bed of the coupling device was designed and the tests of static characteristics and dynamic characteristics of the coupling device were carried out. The test results indicated that the established model in this paper is reasonable and it can be used in the model of hybrid electric vehicle.更多还原