《普拉多越野车制动系统设计》-毕业论文设计（学术).doc

摘 要： 汽车作为陆地上的现代重要交通工具，由许多保证其使用性能的大部件，即所谓“总成”组成，制动系就是一个重要的总成。它即可以使行驶中的汽车减速，又可保证汽车能驻留原地不动。由此可见，汽车制动系对于汽车行驶的安全性和停车的可靠性起重要的保证作用。 本次设计主要是对普拉多越野车制动系统结构进行分析的基础上，根据对越野车车制动系统的要求，设计出合理的符合国家标准和行业标准的制动系统。 制动系统设计是通过对整车主要参数的分析，初步制定出制动系统的结构方案，经过设计计算确定前、后盘式制动器、制动主缸的主要尺寸和结构形式。根据计算的数据论证初步制定的制动系统结构方案的合理性，重新制定了整个汽车制动系统的结构方案，绘制出了前、后制动器装配图、制动主缸装配图、制动管路布置图。最终对设计出的制动系统的各项指标进行评价分析，确定是否达到要求。而且利用计算机辅助设计，保证了设计尺寸的准确性。另外在设计的同时考虑了其结构简单、成本低、环保等因素。计算结果表明设计出的制动系统是合理的、符合标准的。 关键词：普拉多越野车；制动系统设计；盘式制动器；制动主缸；制动管路； Abstract Vehicle on the ground as an important modern means of transport ,to ensure its use by many of the major components,namely , the so-callde “assembly” composed of braking system is an important assembly. That is, it can slow down a moving car, but also ensure that cars can be fixed presence in situ. This shows that the vehicle braking system for cars travelling on the safety and reliability of stopping play an important role in the guarantee. Based on the structural analysis and the design requirements of Prado SUV’s braking system, a braking system design is performed in this thesis, according to the national and professional standards Through analyzing the main parameters of the entire vehicle, the braking system design starts from initial determination of the structure scheme. By calculating and determining the main dimension and structural type of the front、rear disc brake，brake master cylinder，we reapply the structural scheme for the entire braking system of the sample car, and therefore draw the engineering drawings of the front and rear brakes, the master brake cylinder, the diagram of the brake piplines. Furthermore, each target of the designed system is analyzed for checking whether it meets the requirements. In addition, the computer-aided design method is used here for guaranteeing the accuracy of designed dimension. Meanwhile, some factors are considered in this thesis, such as simple structure, low costs, and environmental protection, etc. The result shows that the desig