【導(dǎo)讀】第一章安全氣囊氣囊的作用和發(fā)展歷史---------------------------------. 第二章安全氣囊的組成與分類-------------------------------------------. 第一節(jié)安全氣囊的工作原理-----------------------------------------. 和從事汽車維修、養(yǎng)護(hù)、銷售和售后服務(wù)等工作的初步能力。成、氣囊氣體發(fā)生器、點(diǎn)火器、電器連接件、安全氣囊ECU、SRS警告燈等。實(shí)驗(yàn)和實(shí)踐證明，汽車裝用安全。氣囊系統(tǒng)后，汽車發(fā)生正面碰撞事故對駕駛員和乘員的傷害程度大大減小。安裝了安全氣囊裝置的轎車方。經(jīng)挽救了許多人的性命。低了30%，中型轎車降低11%，小型轎車降低14%。其實(shí)，早在40年前就發(fā)明了安全氣囊。特里特獲得了“汽車緩沖安全裝置”的美國專利。法尼亞州工程師，他在1952年的一次事故后，萌發(fā)了設(shè)計(jì)撞車安全裝置的想法。本能地保護(hù)坐在前座中間位置上的女兒。這次事故后他意識(shí)到必須有一個(gè)更好的。1992年才由美國參議院通過公路死傷減少條例，確認(rèn)了安全。氣囊的作用，規(guī)定從1995年9月以后制造的轎車前排座前均應(yīng)裝備安全氣囊，

　　

【正文】 if the emergency brake locking the tire will generally, after the locking of the tire and the ground is sliding friction, so the braking distance bees longer. If the front wheel lock, car steering loss of lateral force, easily deviation。 if the rear wheels locked, the rear wheels will lose lateral grip, prone to drift. Especially in the snow surface, when the emergency brake, the more likely the above situation. ABS braking oil pressure by controlling the retractable, to achieve the control wheel locked. Course of their work is actually locking release locking release cycle work processes, so that the vehicle is always in the critical state of locking of the roll gap. ASR acceleration skid control system As the name suggests is to prevent the wheel acceleration skid control system, its purpose is to prevent vehicles, especially highpowered car, at the start, and then accelerated the phenomenon of wheel slip to maintain the stability of the vehicle driving direction, maintaining good handling and the most appropriate driving force, to have a good driving safety. How it works is not plicated: When the puter detects a wheel slip, it will reduce engine power output from, and put the wheels skid braking, until the normal rotation of the wheel. No matter how 無錫職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計(jì)說明書 ( 論文 ) 27 advanced the car, that are inpatible with the ground only a few dozen square centimeters large area, that is, the ground area of four tires, if not controlled wheel skid, the car will be out of control. Do not think that only the wheels from locking when the brakes will be out of danger, as will be wheel spin when starting problem. BAS Brake Assist System In urgent cases, 90% of car drivers lack decisive step on the brake, brake assist system is designed for this situation, it is the brake pedal from the driver to detect the speed of the vehicle encountered case, when the driver in an emergency brake pedal quickly, but the stampede when the power is inadequate, the system will help, and in less than one second of time to the maximum braking force to shorten the braking in an emergency in case of braking distance. DAC Downhill Assist Control driving The truth with the same engine brake, the brake system in order to avoid the load is too large, reduce driver burden, down auxiliary control actuator in the sublocation in the L。 speed 525km / h and open the DAC switch conditions, do not step on the accelerator pedal and brake pedal, downhill assist control system can automatically control the speed at the appropriate level. Down the auxiliary control system work automatically when the parking light will light up. DSC Vehicle dynamic control system BMW developed the DSC control system integrates the ASC Automatic Stability Control system and traction control system that can slip through the trend appears to choose the driving wheel brake to control the driving wheel slip state, thus corresponding to the vehicle to play stability. In ice and snow, desert or gravel roads, 無錫職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計(jì)說明書 ( 論文 ) 28 drivers can simply press a button to enter the DTC mode the vehicle so as to enhance vehicle traction on the road. Meanwhile, DSC Dynamic Stability Control system interventions slightly longer response limit, the vehicle39。s traction and driving force also increased, drivers can enjoy sports driving experience extraordinary. DSC Dynamic Stability Control is another function of CBC Cornering Brake Control system, can turn a slight braking force through nonsymmetrical system of vehicle steering control to eliminate excessive trend. HAC ramp from the vehicle control system Halleffect speed sensor can sense both the speed and direction of rotation of the rotor can be perceived, and high sensitivity. When the gear in forward gears, and wheel trends have back (uphill drive less), this system automatically apply braking force to the wheels, when the forward movement of the wheels and the braking force is automatically released. This system can help drivers improve driving safety in the operation of the pathway. HDC ramp control system It proactively sensing the slope of the ramp and road conditions, automatic control of grip, braking force and speed in order to move forward and backward when the full control of speed, stability and security, do not distract the driver to accelerate and brake, where appropriate, manipulation of the steering wheel as long as you can safely pass through dangerous terrain. HDC Hill Descent Control system in the steep slope segment to maintain optimal speed to control. In terms of novice drivers, so offroad driving easier and safer EBA emergency brake assist device 無錫職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計(jì)說明書 ( 論文 ) 29 Under normal circumstances, most drivers start braking exerted only a small force, then the situation on the brake pedal to increase or adjust the braking force applied. If you have a sudden much larger braking force applied, or the driver reaction too slow, this method will prevent them from time to exert maximum braking force. Many drivers also need to impose larger braking force is not ready, or they reacted too late. EBA depress the brake pedal by the driver to understand that the rate of braking behavior, if it is aware of the brake pedal, brake pressure increasing panic, EBA will start within a few milliseconds all the braking force faster than its most driver feet moving much faster. EBA emergency braking can significantly shorten the distance and help prevent the occurrence of stopgo traffic in the rearend accident. EBA realtime monitoring system, the movements of the brake pedal, it is monitored to depress the brake pedal once the speed increased sharply, and the drivers continue to strongly depress the brake pedal, it will release the stored hydraulic pressure of 180 bar to exert maximum system po