1. 研究目的与意义（文献综述）

At present, the relevant design of the car has reached a bottleneck, and a new technological revolution is required to bring about subversive changes. A very important factor that hinders the development of the automotive industry is the energy issue. Fossil energy is non-renewable energy source. To solve the problem that fossil fuels will be exhausted and how to reduce the emissions caused by the burning of fossil fuels, governments have introduced some policies on new energy vehicles. In terms of automobiles that account for about one-third of the world's energy consumption, worldwide, with developed countries such as the United States, Japan, and Europe, most of the world's powerful countries have invested heavily in research and development of electric vehicles. In order to reduce carbon emissions and policy requirements, the development of new energy vehicles is an urgent task. When the policy is tilted, companies must respond quickly. In the case of new energy vehicles, it is wise to vigorously develop new energy vehicles. Buses are also an essential part of people's travel. After the bus power source is turned into electric power, the supporting chassis system and related brackets should also be adjusted accordingly to meet the relevant requirements of the normal driving of the car.

As a future development direction, new energy vehicles are the trend of the times. In order to save on research costs, the chassis system is fine-tuned while keeping the existing car layout as much as possible. Due to changes in the power source, the shape and interior space of the car are also affected accordingly, and corresponding changes are made. In order to adapt to the change of power source, the overall arrangement of the chassis should be adjusted accordingly without affecting the performance of the equipment and not affecting the internal space and the shape of the car. Either completely innovate, from scratch, design a car with a completely new structure. From concept to other specific structures, there is no experience of the predecessors, and it is completely from nothing. Both have their own strengths and each has its own shortcomings.

2. 研究的基本内容与方案

1. complete the selection of each chassis assembly of the chassis

2. complete dynamic economic calculation

3. complete the chassis design and strength check

3. 研究计划与安排

1-2（week 19-20 of the 7th semester） determine the graduation design topic, improve the graduation design task book (related parameters),data collection in school.

3 (1st week of the 8th semester) project conception, literature search, completion of the opening report

4. 参考文献（12篇以上）

【1】汽车构造[m] 陈家瑞 机械工业出版社 2009-6-1，第三版

【2】汽车理论[m] 余志生 机械工业出版社 2009-3-1，第五版

【3】燃料电池轿车总布置的参数化设计[j]. 汪植亮,吴宪. 上海汽车. 2005(05)