论文中级轿车动力系统匹配研究论文.docVIP

毕业设计论文_中级轿车动力系统匹配研究毕业设计论文 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 0.究概况 3 .究状况 4 .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 15 4.1技术参数 15 4.2发动机的特性 15 . 发动机的外特性 15 . 发动机的万有特性 16 . 发动机的转速特性 17 4.3液力变矩器特性 17 . 泵轮力矩系数 17 . 泵轮力矩 18 .和液力变矩器工作点 19 . 变矩系数 20 . 涡轮力矩 20 4.4动力性计算 21 . 各档驱动力和行驶阻力 21 . 加速时间 22 第5章 界面编制 25 5.1编制方法 25 5.2输出结果 26 第6章 结论 29 致 谢 30 参考文献 31 附 录 33 附录A 程序清单 33 附录B 翻译资料 50 绪 论 1.1前言 人类在经济、政治、文化和军事活动中，总会有人的出行和物的运输环节。随社会的发展，出行与运输的范围越来越广，频率越来越高，节奏越来越快。所以人类对出行和运输