1. 研究目的与意义（文献综述）

with the growth of china's economy, china's automobile industryhas developed rapidly. its industrial output value accounts for 4.5% of thecountry's total industrial output value, accounting for 1.46% of the nationalgdp. china's auto market is currently the world's largest single-car market,with annual production and sales accounting for 26.44% and 26.62% of world autoproduction and sales respectively. among them, small cars occupy a large marketshare in the civilian sector, and the development and design of such cars is ofgreat significance. the theme of this design is the front suspension design ofdongfeng qichen d601.6l sedan.

suspension is a force transmission device between the frame andthe axle. it is responsible for transmitting the vertical reaction force, thelongitudinal reaction force and the lateral reaction force acting on the wheelon the wheel and the torque caused by these forces to the frame or the body.its structure plays a decisive role in the steering stability and smoothness ofthe car, and is a part that cannot be ignored in the process of developing anddesigning a car. in order to mitigate the impact, elastic components must beinstalled in the suspension to maintain the elastic connection between theframe or the body and the axle or the wheel; in order to attenuate thevibration generated by the impact of the elastic system, the suspension isrequired to have a vibration damping function. a damper shall be provided inthe suspension; in order to make the trajectory of the wheel meet certainrequirements to avoid adversely affecting certain driving performance of thecar, some of the force transmitting members in the suspension are alsoresponsible for making the wheel the task of the trajectory relative to theframe or body beating, ie the guiding mechanism.

2. 研究的基本内容与方案

2.1. basic content of the design

1、understand domestic and international situations and research status andresearch significance.

2、checkthe relevant materials, according to the specific needs of use, select thefront suspension form of dongfeng qichen d601.6l sedan, determine thestructural size parameters and performance parameters of the front suspension.

3. 研究计划与安排

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

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

(2nd and 3rd week of the 8th semester) off-campusinternship, off-campus data collection, completion of internship report

4. 参考文献（12篇以上）

[1] 陈家瑞.汽车构造（第3版）（下册）[m].北京：机械工业出版社，2009.2

[2] 王望宇.汽车设计（第4版）[m].北京：机械工业出版社，2004.8

[3] 余志生.汽车理论（第5版）[m].北京：机械工业出版社，2009.3