毕业设计（论文）-中级轿车动力系统匹配研究精选.doc

摘 要 动力性和燃油经济性是评价一辆汽车性能好坏的两个重要指标。而汽车燃油经济性和动力性的好坏取决于其动力系统合理匹配的程度。因此在汽车设计中,如何选取汽车发动机和传动系的参数以获取最佳动力性和经济性,以保证各部分的最佳匹配,是各汽车厂家非常关心的问题。因此，动力源和传动系的匹配问题,就成了汽车设计中最为基本和最为重要的问题。 本文以中级轿车为研究对象，系统阐述了国内国外关于汽车动力系统匹配研究的现状及发展趋势，目前采用的部分行业标准和相关法规体系。选定了行星变速器的结构，对其参数进行了数值计算。建立了发动机、液力变矩器、变速器动力性模型，进行数值计算，计算汽车动力性和燃油经济性相关技术指标。并利用MATLAB进行动力性分析编程，分析整车动力性匹配。 关键词：汽车动力系统；动力性；经济性；合理匹配；研究 Abstract Tractive performance and fuel economy are two important indicators of evaluating the performance of the vehicle. And vehicle fuel economy and tractive performance for a better vehicle depends on the degree of matching. Therefore, in automotive design, how to select the automotive engine and power train system parameters in order to obtain the best power and economy to ensure the best matching between that all parts, is the car manufacturers are very concerned about the issue. So, the matching problem between power source and power train system, have become the most basic and most important issue for car design. This paper ,based on the research object of mid-level cars, expounds the power train system matching status of research and development trends at home and abroad the some of the current industry standards and related laws and regulations. its parameters are calculated with reference to specified planetary gear transmission construction . The dynamic model of the engine, torque converter, transmission is established, and make the numerical calculation of vehicle dynamics and fuel economy indexes related technology. And make use of MATLAB to program dynamic analysis , analyze the entire vehicle dynamic matching . Key words：vehicle power train systemtractive performance；fuel economy； reasonable matching；Research 目 录 第1章 绪 论 1 1.1前言 1 1.2课题研究的目的和意义 1 1.3国内外发展概况及趋势 3 1.3.1国内研究概况 3 1.3.2国外研究状况 4 1.3.3研究发展趋势 5 1.4本论文主要工作 5 第2章 汽车动力性经济性评价 6 2.1动力性评价 6 2.2燃油经济性评价 7 2.3动力性、燃油经济性综合评价 7 第3章 中级轿车传动系的结构及其参数计算 8 3.1液力变矩器的结构及其工作原理 8 3.2行星变速器机构的选择 9 3.3行星变速器机构的参数计算 12 第4章 中级轿车的动力性匹配研究 1