基于效率优化的CVT插电式混合动力汽车能量管理策略研究

发布时间：2018-01-03 19:23

本文关键词：基于效率优化的CVT插电式混合动力汽车能量管理策略研究　出处：《湖南大学》2016年硕士论文　论文类型：学位论文

【摘要】：由于能源短缺和环境污染问题日益严峻,发展新能源汽车刻不容缓。插电式混合动力汽车(PHEV)结合了纯电动汽车与混合动力汽车的特点,具有油耗排放低、续驶里程长的显著优势,得到政府和企业的广泛关注并成为研究热点。无级变速器(CVT)能根据车速和负载变化,连续改变传动比,有效控制动力源工作点,是汽车理想的变速系统。本文以搭载CVT的PHEV为研究对象,对其动力系统设计和能量管理策略制定展开深入研究,主要研究内容如下:(1)以传统CVT轿车为基础,对PHEV动力系统的总体结构和布置方案进行设计。在此基础上,根据整车参数和性能指标要求,对动力系统的动力参数进行匹配计算,确定发动机、电机的功率,动力电池的容量及单体个数等关键参数。通过试验获得动力系统各关键部件的性能数据,合理利用实验建模和理论建模方法,建立PHEV动力系统关键部件的效率数值模型。(2)针对PHEV的能量使用特点,提出了一种能量转换系数计算方法,将不同工作模式下的系统效率化为统一标准,并依据不同工作模式的能量传递路径,分析各工作模式的系统效率计算方法。基于动力系统关键部件的效率模型,以系统综合效率最高为优化目标,对各工作模式进行能量管理优化。(3)根据系统效率优化结果,对驱动工况下各工作模式的系统效率进行对比分析,确定驱动工况的模式切换规则。分析了车辆在制动工况下的前后制动力分配规则,在此基础上制定了再生制动力矩分配策略和制动模式控制策略。(4)整车性能仿真与分析。根据PHEV动力系统的结构组成和特点,基于MATLAB/Simulink平台搭建整车前向仿真模型,进行整车动力性和经济性仿真分析,并与仅考虑动力源效率的能量管理策略对比,对所制定的PHEV能量管理策略进行验证。
[Abstract]:Because of the energy shortage and environmental pollution have become increasingly serious, the development of new energy vehicles. A plug-in hybrid electric vehicle (PHEV) combines the characteristics of pure electric cars and hybrid vehicles, with low energy consumption and emissions, continued long driving significant advantages, has been widely concerned by the government and the enterprise continuously and become a research hotspot. The transmission (CVT) according to the speed and load change, continuous change of transmission ratio, effective control of power operating point, is the ideal vehicle transmission system. In this paper, with CVT PHEV as the research object, the power system design and energy management strategy of in-depth research, the main research contents are as follows: (1) based on the traditional CVT car based, designs the overall structure and layout of the PHEV power system. On this basis, according to the requirements of vehicle parameters and performance indicators, matching of power system dynamic parameters The calculation, determine the engine, motor power, the key parameters of power battery capacity and the number of monomers. Performance data to obtain the key components of the power system through the test, the rational use of experimental modeling and theoretical modeling method, value model of efficiency of the number of key components in PHEV power system. (2) according to the characteristics of energy use PHEV and put forward a kind of energy conversion coefficient calculation method, the efficiency of the system under different working modes of uniform standards, and according to the different work mode of the energy transfer path analysis and calculation method of system efficiency of each operation mode. The efficiency model of key components in power system based on the comprehensive efficiency of the system is the highest for the optimization goal, energy management optimization of the working mode. (3) according to the optimization results, the efficiency of the system, the system efficiency of working mode under different driving conditions were analyzed to determine the driving mode Switching rules. Analysis of the vehicle in the braking and braking force distribution rule, on the basis of the development of the regenerative braking torque distribution control strategy and braking mode strategy. (4) the simulation and analysis of the performance of the vehicle. According to the structure of PHEV power system composition and characteristics, simulation based on vehicle model to build MATLAB/Simulink platform, for analysis of vehicle performance and fuel economy simulation, and only consider the power efficiency of the energy management strategy comparison, verification of PHEV energy management strategies.

【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.7

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