1．目的及意义

1. Purpose and significance (including analysis of theresearch status at home and abroad)

With thevigorous development of the automobile industry, people gradually have higherrequirements on the handling stability and smoothness of automobiles. But inthis domain scope, the automobile suspension has the pivotal role. Automobilesuspension from the most simple leaf spring to the spiral spring, and then tothe passive suspension, semi-active suspension, active suspension. Through manyreforms. But the domestic start is late, therefore the active suspensionapplication scope is not very broad, overseas already relatively mature. Safe,intelligent and clean intelligent suspension will be the development trend ofautomobile suspension in the future. The research on semi-active and activesuspension started late in China and there is a big gap between China andforeign countries. In western developed countries, semi-active suspension hasbeen mature since 1980s. However, due to the limitations of other aspects,active suspension was proposed early, but it is difficult to make abreakthrough.{title}

2. 研究的基本内容与方案

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2. Research (design) of thebasic content. Objectives. Proposed technical solutions and measures

2.1 design parameter

In this design,among the intermediate cars, the 2018 version of the manual comfort 1.4l isselected as the reference. The specific parameters are as follows:

length（mm）	3730
width（mm）	1650
height（mm）	1530
Wheel base（mm）	2410
Front gauge（mm）	1420
Track rear（mm）	1430
Curb weight（kg）	1020
Maximum power（KW）	74
Maximum torque（N·m）	135
Front tire specification	165/60 R14
Rear tire specification	165/60 R14
drive mode	FF
The type of front suspension	McPherson independent suspension
The type of rear suspension	Torsion beam type non-independent suspension
Maximum torque speed	4000

2.2 basic content

(1) tounderstand the development status of automobile suspension technology at homeand abroad.

(2) refer torelevant standards and regulations of suspension.

(3) determineand analyze the suspension design scheme of premium cars.

(4) complete thedesign and calculation of the suspension and components.

(5) complete thestructural design of components.

(6) draw 3dassembly drawings and main part drawings.

2.3 technical route

(1) selection offront and rear suspension structures;

(2)determination and calculation of technical parameters (main technicalparameters, suspension performance parameters, suspension static deflection,suspension dynamic deflection, suspension elastic characteristic curve);

(3) design ofelastic elements;

(4) shockabsorber design;

(5) design ofhorizontal stabilizer bar;

(6) suspensionguide mechanism design;

(7) smoothness analysis

2.4 Measures adopted

In order to meet the requirements of good ridecomfort, the natural frequency of the vibration system composed of spring massand elastic components should be in the appropriate frequency band and as lowas possible. Therefore, catia is used to model and complete the assembly of theautomobile suspension after the calculation of each software.

3. 参考文献

4. There are no less than 15 papers on graduationproject, including 5 foreign papers

[1] 王望予.汽车设计（第3版）[M].北京：机械工业出版社，2000.

[2] 陈佳瑞.汽车构造（上）（第3版） [M].北京：机械工业出版社，2005

[3] 余志生.汽车理论（第5版）[M].北京：机械工业出版社，2016.

[4] 中国有色工程设计研究总院.机械设计手册[M].北京：化学工业出版社2008

[5] 陈家瑞.汽车构造（下）（第3版）[M].北京：机械工业出版社，2005.

[6] 冯国胜，杨绍普.车辆现代设计方法 [M].北京：科学出版社，2006.

[7] 德国BOSCH公司.BOSCH汽车工程手册[M].北京：北京理工大学出版社，2004.

[8] 中国汽车工程学会，汽车工程[J].

[9]解子胜，新能源汽车研究与开发[J].

[10]中国汽车工程学会；长春汽车研究所，汽车技术[J].

[11]Mucka，P，Energy-harvesting potential of automobile suspension[J], Science CitationIndex Expanded.

[12] Veronel-George Jacot#259;; Eugen-MihaiNegru#351;; Marius Florin Toma，Evaluation and Measurementthe Recovered Energy from Automobile Suspension in the Operation Conditions[J]. 《International Journal ofAutomotive Technology》2018,No.6 page1049-1054.

[13] Yang Jun; Dong Mingming，Researchon Vibration of Automobile Suspension Design[J].《MATEC Web of Conferences》2018,page 4008.

[14]Jialing Yao; Zhihong Li; Meng Wang; Feifan Yao; Zheng Tang, Automobile activetilt control based on active suspension[J]《Advances in MechanicalEngineering》2018,No.10

[15] Li, Y; Li,G; Zhang, QR, Automatic control system of automobile suspension[J]《PROCEEDINGS OFTHE 5TH INTERNATIONAL CONFERENCE ON CIVIL ENGINEERING AND TRANSPORTATION 2015》2016, page1824-1828.

1．目的及意义

1. Purpose and significance (including analysis of theresearch status at home and abroad)

With thevigorous development of the automobile industry, people gradually have higherrequirements on the handling stability and smoothness of automobiles. But inthis domain scope, the automobile suspension has the pivotal role. Automobilesuspension from the most simple leaf spring to the spiral spring, and then tothe passive suspension, semi-active suspension, active suspension. Through manyreforms. But the domestic start is late, therefore the active suspensionapplication scope is not very broad, overseas already relatively mature. Safe,intelligent and clean intelligent suspension will be the development trend ofautomobile suspension in the future. The research on semi-active and activesuspension started late in China and there is a big gap between China andforeign countries. In western developed countries, semi-active suspension hasbeen mature since 1980s. However, due to the limitations of other aspects,active suspension was proposed early, but it is difficult to make abreakthrough.{title}

2. 研究的基本内容与方案

{title}

2. Research (design) of thebasic content. Objectives. Proposed technical solutions and measures

2.1 design parameter

In this design,among the intermediate cars, the 2018 version of the manual comfort 1.4l isselected as the reference. The specific parameters are as follows: