低速电动轿车动力性匹配分析.doc

低速电动轿车动力性匹配分析
Dynamic Matching Analysis of Low-speed Electric Cars

21700字 51页

本人自己的毕业设计作品，确保原创，放心使用！


摘要： 汽车的动力性系是指汽车在良好路面上直线行驶时汽车受到的纵向外力决定的，所能达到的平均行驶速度。从获得尽可能的平均行驶速度的观点来看，汽车的动力性主要由汽车的最高车速，加速时间，最大爬坡度来评定。
汽车传动系统是位于动力装置和驱动车轮之间的动力传动装置，其基本功用是将动力装置发出的动力传给驱动车轮。
传动系统的首要任务是与动力装置协同工作，以保证汽车在各种行驶条件下正常行驶所必需的驱动力与车速，并使汽车具有良好的动力性和燃油经济性。传动系统具有以下功能，实现减速增距；实现汽车变速；实现汽车倒驶；必要时中断传动系统的动力传递；应使两侧驱动车轮具有差速作用。
电动汽车传动系统的参数是否合理匹配对电动汽车的动力性、续驶里程等都有显著的影响。本次毕业论文的主要工作如下：
概括电动汽车的发展现状，分析电动汽车的分类和关键技术，讨论电动汽车几种传动系统的结构组成及特点。在此基础上，从成本和技术两方面考虑，确定家用低速电动轿车的驱动方案。
从整车技术参数出发，对低速电动轿车的电动机参数、蓄电池参数、轮胎参数、驱动桥参数进行匹配分析计算并进行选型，为保证低速电动轿车的动力性，设计两档变速箱，以续驶里程为目标函数，对变速箱的传动比进行优化设计。并根据设计参数对电动轿车的动力性能进行理论校核。

关键词： 电动汽车 动力性 传动系统 参数 匹配

Dynamic Matching Analysis of Low-speed Electric Cars

Abstract: Automobile dynamic system refers to when driving in good straight pavement, the vehicle is determined by the longitudinal force, can achieve the average speed. From the point of view to get as much as possible of the average speed, automobile dynamic property is mainly assessed by the maximum speed of the car, acceleration time and maximum gradability.
Automotive Transmission is a power transmission unit which is located between the power unit and drive wheel. Its basic use is to transmit power from the power unit to the drive wheels.
The primary task of the transmission system is to work together with the power unit in order to ensure the driving force and the speed of the car in a variety of driving conditions as well as good power and fuel economy.The transmission system has the following features: Deceleration extender; variable speed; car driving inverted; to interrupt the drive train of the power transmission when necessary; should enable both sides of the driving wheel having a differential action.
Whether the parameter matching of the electric vehicle drive system is reasonable has important implications for automobile dynamic property of electric vehicle and driving range. The graduation of the project is as follows:
To elaborate the status of the development of electric vehicles, classification and key technologies of electric vehicles, to discuss the composition and characteristics of the electric vehicles of several transmission system .On this basis, in terms of cost and technical considerations, determine the household low-speed electric car driving scheme.
Considering of the technical parameters of vehicle, make matching calculation and selection of the parameters of the motor, battery parameters , the low-speed electric car tire parameters and drive axle parameters, in order to ensure the low-speed electric car power, design a two tranches gearbox, Take the continued driving range as the objective function, the transmission gear ratio has been optimized. Finally, make theoretical check in accordance with the design parameters of the low-speed electric vehicle power performance.
Key words electric car dynamic property transmission system matching parameters

目录

第一章 绪论 1
1.1课题研究背景 2
1.1.1我国的电动汽车发展现状及前景 2
1.1.2国外的电动汽车发展现状及前景 3
1.1.3低速电动轿车动力性匹配分析 4
1.2低速电动轿车动力性匹配分析的必要性与可行性 6
1.2.1电动汽车的分类 6
1.2.2纯电动汽车的关键技术 11
1.2.3本论文的目的及意义 12
1.3本论文的主要内容及方法 14
第二章 低速电动轿车动力性方案选择 15
2.1电动汽车动力传动系统基本构成 15
2.2 电动汽车动力传动系统布置形式 16
第三章 低速电动轿车传动装置参数确定 18
3.1电动机参数设计 19
3.2蓄电池的参数选择 23
3.2.1电池的数目 24
3.2.2电池组容量的选择 25
3.3车轮选型 26
3.4传动系统参数匹配 28
3.5两档变速器的设计 31
3.5.1传动比范围的确定 31
3.5.2传动比的优化设计 33
3.5.3变速器中心距的确定 37
3.5.4变速器齿轮齿数的确定 37
3.6低速电动轿车动力性理论校核 40
3.6.1最高车速 41
3.6.2最大爬坡度 41
3.6.3加速时间 42
结论 44
致谢 45
参考文献 46