电动SUV制动系统设计(含CAD零件图装配图,CATIA三维图)(任务书,开题报告,文献摘要,外文翻译,论文说明书13000字,CAD图纸5张,CATIA三维图)
摘要
摘 要
制动系统是汽车重要的组分，本文简要介绍了电动SUV制动系统的设计。在制动器选择方面，比较了盘式制动器和鼓式制动器性能的优劣，由于盘式制动器质量轻，结构简单，散热良好，制动效能稳定等优点，所以电动SUV前后轮制动器均采用浮盘式制动器。
制动器的类型选定后，进行整个制动系统的设计计算。第一是制动器零部件，主要包括制动盘，摩擦衬块，制动钳体等零件的结构及材料选择和尺寸的确定。第二是制动系主要参数的计算和校核，依据汽车质量、质心位置等已知参数，计算确定制动力分配系数、同步附着系数、前后轮制动力以及最大制动力矩等，对驻车制动进行核算。最后是制动驱动机构设计，主要设计内容是制动轮缸和制动主缸直径的选择计算、踏板行程计算。
本次设计的制动管路采用X型回路布置。为节能环保，制动系统加装了能量回收装置，利用电机进行制动，所以制动系统为电液复合制动，论文初步确定了电液复合制动控制方案以及ABS控制方案。在制动助力方面，缺少发动机作为真空助力器的真空源，因而选择采用电动真空泵。
在上述设计计算完成后，对车辆制动距离和制动时方向稳定性进行分析，验证了设计的合理性。最后，根据设计参数用CATIA建立三维模型，然后用CATIA工程制图绘制制动器的装配图和制动钳体、轮缸、制动盘、摩擦衬块等零件图。
关键词：盘式制动器设计；再生制动；ABS；电动汽车
Abstract
Braking system is an important part of vehicle, this paper mainly introduces the design of electric SUV braking system. In brake selection, compares the brake disc and drum brake performance, considering the disc brake has the advantage of light weight and small size, good heat dissipation, stable brake performance, etc, so the design of the brake adopt floating disc brake.
After the brake structure solution is selected, the paper designs the brakes as follows. The first is the brake component, which mainly includes the materialselection of the dimension of the parts, such as the brake disk, the friction block and the brake body. The second is the main parameter calculation and checking of breaking system, according to the known parameters, such as automobile quality, calculate and determine the braking force distribution coefficient, synchronous adhesion coefficient, braking intensity, the front braking force and maximum braking torque, etc. The third is the braking design of the vehicle, which adopts the rear wheel standing car brake, and the mechanical structure of the engine braking is added to the disc brake in the rear wheel. The fourth is the design of brake drive mechanism, which mainly includes the design calculation of brake wheel cylinder, brake master cylinder and pedal stroke.
The brake pipe of breaking system is arranged in an X circuit. For energy conservation and environmental protection, the braking system has en energy recovery device, using the brake motor, so the braking system is the electro-hydraulic compound braking, the paper preliminarily determines the electro-hydraulic compound brake control scheme and ABS control scheme. In braking power, the engine lacks the vacuum source of the vacuum booster, so the electric vacuum pump is chosen.
After the design calculation is completed, the stability of braking and the distance of braking is analyzed, and the rationality of the design is verified. Finally, using CATIA to complete 3D model according to the design parameters, then use CATIA to draw brake assembly drawing , wheel cylinder, brake disc, brake caliper body friction liner part drawing, etc.
Keywords: disc brake design, regenerative braking, ABS, electric vehicle
目 录
第1章 绪论 3
1.1制动系统的基本概念 3
1.2 制动系统应用及研究现状 4
1.3 制动系统的设计要求 4
第2章 制动系统的结构选择 5
2.1制动器的结构选择 5
2.1.1鼓式制动器简介 5
2.1.2盘式制动器简介 6
2.1.3电动SUV制动器选择 7
2.2制动驱动机构的结构选择 8
2.3制动分路系统的选择 9
2.4助力器的选择 10
第3章 制动系主要参数的选择计算 10
3.1制动力及制动力分配系数 10
3.2同步附着系数 12
4.制动器的设计计算 13
4.1制动盘的设计计算 13
4.2摩擦衬块的设计计算 14
4.3摩擦衬块的磨损及温升核算 16
4.3.1比能量耗散率 16
4.3.2 比滑磨功 17
4.3.3制动器热容量及温升核算 18
4.4制动器制动力矩的计算 19
4.5驻车制动核算 21
5.制动驱动机构的设计计算 23
5.1制动轮缸的计算 23
5.2制动主缸的计算 24
5.3制动踏板的计算 25
6.电动SUV的ABS控制 26
6.1 ABS控制参数的计算 26
6.2 ABS的结构及控制原理 28
7.再生制动与电液复合制动系统 30
7.1再生制动的结构原理 30
7.2电液复合制动系统的设计 31
7.2.1 ECE制动法规下的制动力分配系数 31
7.2.2两种制动模式下的制动力分配 32
7.2.3 再生制动与ABS协调控制 35
总 结 35
参考文献 37
致 谢 39
|
