Graduation Design (Dissertation) of

Wuhan University of Technology

Design of PEUGEOT 4008’s

Braking System

School： Institute of International Education

Specialty amp; Class：Automotive Engineering 1301

Student name： Liao Ying Jie

Tutor name： Feng Zhi Yong

Statement of Originality

I solemnly declare that the thesis I submit is a piece of writing I completed independently based on my own research under the guidance of my supervisor. Except for the quotations, this paper does not include any writings published or completed by other individuals or groups. I am fully aware that the legal consequences of this statement are borne by me.

Signature of the author: Liao Ying Jie

Date: May 28th

Copyright Letter of Authorization to The Dissertation

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Abstract

This paper mainly studies the design of the compact SUV’s braking system, including the comparison and selection of the braking system, the design calculation and the structural design of the braking system.

At present, the safety of the car on the braking system put forward higher and higher requirements, especially in recent years, to the good sales of sport utility vehicles (SUV models), how to design a braking system that meets the safety requirements and the national standard requirements according to a set of standardized design process is particularly important. Based on the development of the braking system at home and abroad, as well as the actual situation of the usage, this paper expounds the background, theoretical value and practical significance of the thesis.

In theory, the paper expatiates on the selection and scheme’s process of the brakes according to the vehicle model. The main parameters of the braking system are selected and the basis is explained. The design and calculation of the brakes, as well as the strength’s calculation of the main components of the brake are carried out by the methods of force analysis and the model’s establishment. At last, this paper conducts the structure design. ABS (antilock brake system) and EPB (electronic parking system), which are equipped with the vehicle, are introduced and the simple selection work is carried out.

Finally, summarize and draw the design results.

Key Words: Sports vehicle; Brake system’s design; ABS

Contents

Chapter 1 Introduction 1

1.1 The purpose and significance of the design (including analysis of the domestic and international research status) 1

1.1.1 Research Status at Home and Abroad 1

1.1.2 The purpose and meaning of the design 2

1.2 The basic content of the design 2

Chapter 2 Determination of braking system’s program 3

2.1 Brake’s structure type and selection 3

2.1.1 The formulation of the brake’s program 3

2.1.2 Comparison and selection of different program for brakes 3

2.2 The structure type of brake driving mechanism and its choice 4

Chapter 3 The design and calculation of the brake system and its structure design 6

3.1 The main parameters of brake system and its selection 6

3.1.1 Determination of synchronization adhesion coefficient 6

3.1.2 Calculation of the braking force distribution coefficient β 7

3.1.3 Calculation of the maximum braking torque of the brake 7

3.1.4 Calculation of brake factor 7

3.1.5 Determination of Disc brake’s main parameters 8

3.2 Design and calculation of the brake 8

3.2.1 Calculation of wear characteristics of friction pads 8

3.2.2 Calculation of brake torque for disc brakes 9

3.3 Structural design and strength calculation of the main components of the brake 10

3.3.1 Structural design of the main components of the brake 10

3.4 Design and calculation of brake driving mechanism 12

3.4.1 Multi-loop system’s selection for brake pipes 12

3.4.2 Design and calculation of hydraulic brake driving mechanism 13

3.4.3 Structural design of brake master cylinder 16

3.4.4 Design of vacuum booster 17

3.4.5 Structural design of pedal mechanism 18

3.5 Design of ABS (Anti-lock Braking System) 19

3.5.1 Composition and function of wheel anti-lock braking system 19

3.5.2 Configuration of anti-lock braking system on the vehicle 21

3.6 Design of electronic parking system 22

3.6.1 Structure design of electronic parking system 22

3.6.2 Function of electronic parking system 23

Chapter 4 Establishment of CATIA 3D Model 25

4.1 Modeling of brake discs 25

4.2 Friction plates’ modeling 25

4.3 Brake caliper’s modeling 26