2.0L轿车制动系统的设计开题报告

全文总字数：9002字

1. 研究目的与意义（文献综述）

with the rapid development of the automobile industry, the optimization of various automotive systems is also continuously carrying out automobile braking, which refers to the ability of the vehicle to stop in a short period of time and maintain the stability of the driving direction and maintain a certain speed in a long slope, which is called automobile braking.

automotive braking is one of the main performance of the car, therefore, the design of automotive braking system is particularly important. automobile brake system is a brake mechanism installed on the vehicle. in order to ensure the safety of the vehicle and improve the average speed of the vehicle, the brake mechanism installed on the vehicle has a great influence on the operating stability of the vehicle. automobile braking system is the driver through the operation of a simple mechanical system to transfer the force to the brake, but requires a small mass and low speed. with the increase of the dead weight and speed of the car, the vacuum booster device appeared. in 1923 the cadillac company began to assemble vacuum boosters in large numbers. then came hydraulic braking technology, which gm and ford began using in the 1930s. in the 1980 s, with the maturity and development of the automobile electronic technology, known as the car, one of the three great inventions in the history of the braking system began to use and promotion, because sliding rate will affect the braking effect, and the wheel slip ratio in abs braking process can be controlled in appropriate range, thus improve the wheel lateral adhesion rate, thus achieved the best effect of braking. the emergence of the esp system in the 1990s was another major step forward in improving active safety. the esp system greatly improves the vehicle's ride stability by controlling the brake pressure in real time or changing the output torque of the engine.

nowadays, the research direction of braking system in china is also very broad, and the improvement and perfection of traditional braking system are in progress. yang yi modeled and improved its braking system based on bmw 355i [1]. zhang xueyi, li longhai and others designed braking pipelines to improve braking performance [2]. li jun and hu zongmei optimized the braking force distribution ratio [3]. wang zhizhong et al. focused on the vehicle slip rate to achieve the purpose of improvement [4]. gao pan and cheng wenhao are devoted to the research of abs braking system [5]. as for some new technologies, some domestic universities are still in the stage of learning and drawing lessons from foreign technologies. many universities in the automotive field, such as jilin university, have set up emb system test bed. the research direction is mainly to study brake hardware, software and control methods [6]. cai kuong of jiangsu university started with the structure of disc brake friction lining to optimize the braking performance of the car [7]. wang yuxi of jilin university realized fine adjustment and effective estimation of wheel cylinder pressure, so as to accurately control slip rate and achieve optimization purpose [8]. tang ping of xihua university has optimized the design of the braking system of cars [9]. lai feng of wuhan university of technology aimed at heavy vehicles by developing software based on matlab and gui toolbox, thus shortening product development cycle, improving design efficiency and reducing cost [10].in foreign countries, most of the research on automobile braking system is electronic mechanical braking system (emb), which takes the motor driving component as the brake actuator and replaces the traditional hydraulic or pneumatic braking method. as a brand new braking concept, emb makes up for many shortcomings of traditional braking methods. it has the characteristics of no braking fluid, fast response, reliable performance, safety and environmental protection. mustafa gunay et al. evaluated the brake disc - plate mechanism by analyzing various brakes [11]. s. nadanasabapathy et al. studied the pulse effect of brake pedal through software and experiments [12]. mohamad khairi ishak prevents abs intrusion through the controller lan and guarantees the integrity of the connected ecu [13]; richard w. rosenbaum invented the "tightening" sensor to effectively remove the driver's reaction time during braking and improve safety [14]. sundar shrestha measured the adhesion condition by a more accurate control algorithm [15].

2. 研究的基本内容与方案

2.1 research contents and objectives

(1) consult the data first, and have a deep understanding of the basic knowledge of the braking system, including its composition and classification, and the design requirements of the car braking system.

(2) select a 2.0l model and design the overall scheme of the braking system, including the scheme selection of the brake form, the scheme selection of the hydraulic branch system and the design scheme of the hydraulic brake master cylinder.

3. 研究计划与安排

1 (week 19 of semester 7) : determine the topic of graduation design, improve the graduation design assignment (related parameters), and collect information inside and outside the school.

2 (week 1 of the 8th semester) : plan conception, literature search, and completion of the opening report.

3 ~ 4 (the 2nd to 3rd week of the 8th semester) : foreign language translation and data collection.

4. 参考文献（12篇以上）

[1]杨怡.基于2011宝马335i汽车制动系统设计[j].内燃机与配件,2019(17):3-4.

[2]张雪一,任峰,李龙海.汽车制动系统管路设计[j].时代汽车,2019(15):97-98.

[3]李骏,胡宗梅.汽车制动力分配比的优化与分析[j].农业装备与车辆工程,2008(11):18-19 30.