电动车的气压制动系统

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毕业设计说明书电动汽车气压制动系统设计

学院：交通与车辆工程学院

专业：交运1202

学生姓名：雷威

学号： 12110202112

指导教师：鲁力群

2016 年 6月

摘要

制动系统是电动汽车的一个重要构成部分，它的工作性能会影响电动汽车的安全性。电动汽车制动系统是用以强制行驶中的电动汽车减速或泊车、使下坡行驶的汽车的车速保持稳定以及使已停驶的遇上电动汽车在原地保持不动的机构。随着高速公路的迅速发展和车速的提高以及车流密度提高的日趋增大，为了确保行车安全，汽车制动系统的工作可靠性显得非常重要。也只有制动效能良好、制动系统运行可靠的电动汽车，才能充分发挥其动力性能。

气压制动是最常见的制动系统，多用于中重型汽车。气压制动系统是发展最早的一种动力制动系统。其供能装置和传动装置全都是气压式的。其控制装置大多数是由制动踏板机构和制动阀等气压控制元件组成。本文以荣威E50电动汽车为研究对象，通过理论分析和计算对其气压制动系统结构进行设计，讨论气压制动系统在纯电动汽车上的应用。

关键词：气压制动；制动性；电动汽车；制动装置；

Abstract

Electric vehicle braking system is an important part, it directly affects the safety of electric vehicles electric vehicle braking system is used to force the running of the electric vehicle to slow or stop, the downhill driving car speed remained stable and was not in electric vehicles in situ resides not actuating mechanism. With the rapid development of Expressway and increase the speed and traffic density increasing day by day, in order to guarantee the traffic safety, vehicle braking system working reliability becomes more and more importannt. Only the braking efficiency, good brake system work reliable electric vehicle, in order to give full play to its dynamic performance.

The barometric brake system is the most familiar power servo brake system．The barometric brake system is the first development of a dynamic braking system. Its energy supply all equipment and gear-type pressure Most of the control device is a brake pedal and the brake and other institutions formed the original. In this paper, the application of Roewe E50 electric car, Through theoretical analysis and calculation of the structure of its air brake system design, discussion of air brake system on pure electric vehicles.

Key words: barometric brake syste;rake performance; Electric vehicle; Brake rigging

目录

摘要............................................................................................................................ I Abstract....................................................................................................................... II 目录.............................................................................................................................. I II 第一章绪论 (1)

1.1 课题背景与意义 (1)

1.1.1 电动汽车历史 (1)

1.1.2 我国电动车行业现状 (2)

1.1.3 电动汽车发展前景 (3)

1.2制动系统的作用 (4)

1.3气压制动系统研究现状 (5)

1.4本文研究内容 (5)

第二章制动系的总体设计 (6)

2.1制动系统的设计要求 (6)

2.2制动系的参数选择 (6)

2.3前后轴制动力分配系数与同步附着系数的确定 (7)

ϕ (7)

2.3.1确定同步附着系数

2.3.2确定前后轴制动力矩分配系数β (9)

2.4 本章小结 (9)

第三章制动器的设计与计算 (10)

3.1制动器制动力矩的确定 (10)

3.2鼓式制动器的主要参数 (11)

3.2.1确定制动鼓直径D (11)

3.2.2摩擦衬片宽度b及包角β (13)

3.2.3摩擦衬片初始角的选取 (14)