1、 毕业设计 （ 外文翻译 ） 机电及汽车工程 学院 车辆 专业 2 班 学生姓名 李帮政 学 号 08230227 指导教师 文孝霞 教研室主任 孙庆 重庆交通大学二 O 一二 届毕业设计（ 论文） 译文 Automotive safety systems and technology research and analysis One Automobile active security technology 1. ABS braking system Ant-lock Braking System (Braking System, lock do by ABS computers as A
2、BS), hydraulic device, the wheel speed sensors, brake hydraulic pipeline and electrical wiring etc. Their structures are shown below. ABS tasseled for the car in various driving conditions braking performance and brake safety particularly important, especially is emergency braking, can make full use
3、 of the peak between tire and road surface adhesion properties, improve performance and reduce automobile fight sideslip braking distance, give full play to the braking performance, but also increase the automobile braking process control. So as to reduce the possibility of car accidents. No install
4、ation ABS car, if the driving force trample brake pedal, wheel will rapidly lower speed, and finally wheels stop turning, but body because of inertia remains forward sliding. This phenomenon was at the wheel and pavement occur between larger slip, appear this kind of situation, the car tires of auto
5、mobile lateral spreads almost disappear, so poor force will appear the following phenomena: (1) Steering stability fall: the steering wheel is ineffective, vehicle tail manipulation of curl, serious when vehicle circles or appear folding phenomenon； (2) Handling fall: manipulate the steering wheel a
6、nd short of steering requirements； (3) Braking distance extended: more than general braking distance. So, we can imagine to have installed ABS system of the car safety is 重庆交通大学二 O 一二 届毕业设计（ 论文） 译文 very important. 2 the ASR drive torque control system ABS are used to prevent car braking process whee
7、l lock, will wheel sliding rate control in ideal range, so as to shorten the braking distance, improve automobile braking direction stability and steering control, so as to improve the safety of the car. Along with the increase of vehicle performance requirements, not only in braking process require
8、d to prevent wheel lock, and asked the driver to prevent drive roller skating turn in the process, making cars in the direction stability, driving process steering control ability and acceleration performance, so are improved by the car drive torque steering system ASR (Accelerations Regulation) Sli
9、p. ASR is the perfect complement and ABS ASR, but most alone is set with ABS combined together, commonly used ABS/ASR says, called antiskid control system. ASR is mainly used to prevent car in the beginning, accelerate the wheels, guarantee slip in the car accelerated rate and improve the stability
10、in bad pavement drive attached conditions. It makes no difference speed in the car lock ice roads and muddy road started and to improve its capacity, also can prevent high in speed by turning cars gliding pavement and rear lateral spreads phenomenon. Anyhow, prevent the wheel because ASR slip, can m
11、aximize the engine driving moment of cars had enough, ensure the longitudinal force, lateral force and manipulation of power, make cars in starting, steering and accelerate the process, in gliding and muddy road, in a mountain area downhill process can steadily driving, guarantees the safety, reducing tire wear and fuel consumption, and improves the car driving capability. 3 VDC system ABS/ASR system successfully solves the brake and the car when driven direction stability problem, but cannot solve the vehicle steering stability problem driving direction. For example when steering road,
