毕业设计论文_福田轻型货车制动系统设计_精品.doc

毕业设计论文_福田轻型货车制动系统设计 Abstract Braking system is one of the most important system in the automotive . because of the continuous development with the highway. The car will become more and more high-speed, braking system on the work of the increasing reliability requirements,Brake work of a reliable car,guarantee the safety of travelling,This shows that, The braking system design of practical significance. The braking system is one of important system of active safety. Based on the structural analysis and the design requirements of intermediate car’s braking system, a braking system design is performed in this thesis, according to the national and professional standards. First through analyzing the main parameters of the entire vehicle, the braking system design starts from determination of the structure scheme. SecondlyCalculating and determining the main dimension and structural type of the front、rear brake，brake master cylinder，se of computer-aided design drawing draw the engineering drawings of the front and rear brakes, the master brake cylinder, the diagram of the brake pipelines. Furthermore, each target of the designed system is analyzed for checking whether it meets the requirements. some factors are considered in this thesis, such as simple structure, low costs, and environmental protection, etc. The result shows that the design is reasonable and accurate, comparing with the related national standards. Key words：light truck；brake；drum brake；master cylinder；hydraulic pressure system 目 录 第1章 绪 论 1 1.1 本次制动系统设计的意义 1 1.2 本次制动系统应达到的目标 2 1.3 本次制动系统设计内容 2 1.4 汽车制动系统的组成 3 1.5制动系统类型 3 1.6 制动系工作原理 3 第2章 汽车制动系统方案确定 5 2.1 汽车制动器形式的选择 5 2.2 鼓式制动器的优点及其分类 6 2.3 盘式制动器的缺点 7 2.4 制动驱动机构的结构形式 8 动系 8 动系 9 动系 9 2.5 制动管路的形式选择 10 2.6 液压制动主缸方案的设计 11 第3章 制动系统主要参数的确定 13 3.1 轻型货车主要技术参数 13 3.2 同步附着系数的的确定 13 3.3 前、后轮制动力分配系数的确定 14 3.4 鼓式制动器主要参数的确定 14 3.5 制动器制动力矩的确定 15 3.6 制动器制动因数计算 16 3.7 鼓式制动器零部件的结构设计 17 第4章液压制动驱动机构的设计计算 21 4.1制动轮缸直径d的确定 21 4.2 制动主缸直径d的计算 21 4.3