Automotive safety systems and technology research and analysis Abstract: auto parts of good and bad will directly affect the safety of the carare directly related to the peoples life safety and security in wealth. This articlemainly from the cars active safety technology and passive safety technology twoaspects elaborated the importance of car parts and how to improve the safety ofthe car. Key words: automobile active safety technology passive safety technology As traffic tools of the modernization and absolute number increase sharplytraffic accidents are also increasing. Car accident has become severe global socialissues. Undoubtedly advanced auto safety facilities are the driving safetyindispensable safeguard. So we should start from technology to research anddevelopment of high performance high safety car also want to strengthen theregular inspection in cars so timely maintenance investigation make cars often ingood technical status so as to improve the safety performance of the car. Here we introduced active safety technology and automobile car passivesafety technology. Auto safety is according to the traffic accident happened beforeand after the classified. One is in a traffic accident take safety measures especiallybefore immediately will produce risk condition drivers manipulate the steeringwheel avoid or emergency brake to avoid traffic accidents. In the car drive inusually to ensure the basic manipulation stability drivers on the surroundingenvironment and to ensure the visual recognition sex drive the car itself developedthe basic performance ant-lock braking system ABS prevent slippery drivesystem ASR active suspension power steering and four-wheel drive 4WDfour-wheel steering 4WS lighting system wiper the rearview mirror preventfrom rear-end collision car alarm system and laser radar etc. These securitydevices and technology called active safety system can also be called preventive 河北工程大学毕业设计security system. On the other hand in order to reduce traffic accidents andcompany by personnel directly suffer degree ensure company take staff andpedestrian safety says the security for passive safety can also be called conflictsafety. When after the accident in order to prevent disasters including prevent theexpansion of fire and make crew from traffic accident can extricate the securitydevices and systems called prevent disaster expand security system.One．Automobile active security technology 1. ABS braking system Ant-lock Braking System Braking System lock do by ABS computers asABS hydraulic device the wheel speed sensors brake hydraulic pipeline andelectrical wiring etc. Their structures are shown below. ABS tasseled for the car in various driving conditions braking performanceand brake safety particularly important especially is emergency braking can makefull use of the peak between tire and road surface adhesion properties improveperformance and reduce automobile fight sideslip braking distance give full playto the br
aking performance but also increase the automobile braking processcontrol. So as to reduce the possibility of car accidents. No installation ABS car if the driving force trample brake pedal wheel willrapidly lower speed and finally wheels stop turning but body because of inertiaremains forward sliding. This phenomenon was at the wheel and pavement occurbetween larger quotslipquot appear this kind of situation the car tires of automobilelateral spreads almost disappear so poor force will appear the followingphenomena: 1 Steering stability fall: the steering wheel is ineffective vehicle tailmanipulation of curl serious when vehicle circles or appear folding phenomenon 2 Handling fall: manipulate the steering wheel and short of steeringrequirements 3 Braking distance extended: more than general braking distance. So we can imagine to have installed ABS system of the car safety is veryimportant. 1 河北工程大学毕业设计 2．the ASR drive torque control system ABS are used to prevent car braking process wheel lock will wheel slidingrate control in ideal range so as to shorten the braking distance improveautomobile braking direction stability and steering control so as to improve thesafety of the car. Along with the increase of vehicle performance requirements notonly in braking process required to prevent wheel lock and asked the driver toprevent drive roller skating turn in the process making cars in the directionstability driving process steering control ability and acceleration performance soare improved by the car drive torque steering system ASR AccelerationsRegulation Slip. ASR is the perfect complement and ABS ASR but most alone isset with ABS combined together commonly used ABS/ASR says called antiskidcontrol system. ASR is mainly used to prevent car in the beginning accelerate the wheelsguarantee slip in the car accelerated rate and improve the stability in bad pavementdrive attached conditions. It makes no difference speed in the car lock ice roadsand muddy road started and to improve its capacity also can prevent high in speedby turning cars gliding pavement and rear lateral spreads phenomenon. Anyhow prevent the wheel because ASR slip can maximize the enginedriving moment of cars had enough ensure the longitudinal force lateral force andmanipulation of power make cars in starting steering and accelerate the processin gliding and muddy road in a mountain area downhill process can steadilydriving guarantees the safety reducing tire wear and fuel consumption andimproves the car driving capability. 3．VDC system ABS/ASR system successfully solves the brake and the car when drivendirection stability problem but cannot solve the vehicle steering stability problemdriving direction. For example when steering road inevitably by lateral andlongitudinal force only local surface can provide full lateral and longitudinal forcethe pilot can control vehicles. If the ground adhesion ability lower lateral willdamage cars driving ability predetermin
ed direction. Rainy days cars driving often 2 河北工程大学毕业设计high-speed steering lateral sliding out it is the ground because of insufficientlateral adhesion ability. To resolve the issue and developed countries automobileindustry recently in ABS/ASR system on the basis of the development of dynamicControl system into car Dynamics Control the abbreviation VDC Vehicle. Thesystem of the car brake driving suspension steering engine and so on variousmain assembly control system in function structure organic ground comprehensivetogether can make cars in all kinds of bad working conditions such as ice roadpavement commuting river bend pavement and took evasive action moving linebraking and acceleration and the downhill for different conditions such as bearingdifferent type pressure and different levels of type wear all have good directionstability to show the best driving performance. VDC applications in brakingacceleration and steering aspects of drivers fully released request is the car ofactive safety driving a new milestone. VDC of steering control system is mainly by driving for each wheel brakecontrol and engine power output control to realize. For example if the car turn leftfront wheel for steering the inadequate capacity tend to slip out of the corner VDCsystem can measure imminent just know lateral spreads left rear brake adoptappropriate measures. If at the same corner because rear wheel tend to slip out offavor of lateral overmuch VDC system is proper braking to front-right wheelfailure maintain the stability of the vehicle driving. In extreme cases VDC systemcan also take reduce engine to reduce the power output and to reduce the speed ofthe demand side adhesion ability to maintain the stability of the vehicle driving.Adopt VDC system automobile in folio pavement or corner of pavement brakingdistance still can further reduce. 4． CCS cars cruise control system Auto cruise Control System Cruiser Control System abbreviation for CCSis can make automobile work in engine favorable speed range reduce driversdriving manipulate labor intensity improve the driving comfort the automaticdriving device. Car cruising system CCS role is required by the driver: after anormally-closed switch no speed on the accelerator pedal can automatically keep 3 河北工程大学毕业设计the speed make the vehicle with the fixed speed. Using this device when on thehighway after a long time the driver driving not have to control the acceleratorpedal reduce fatigue while reducing unnecessary speed change can reduce savefuel. Auto cruise control system is the earliest development of the automotiveelectronic control system. This system USES another speed sensor will speedsignal input engine control microcomputer by microcomputer control vacuumsystem work. This system can make use of the server speed control switch leverand brake pedal on vacuum lift switches etc its function and basic system thesame. In this system electronic control device can accord
change of drivingresistance automatic regulation engine throttle Angle make the speed constant.Such not only reduce unnecessary speed change which saves fuel also reduced thedrivers burden. The electronic cruise control system which is shown in figure 2.Two. Automobile passive safety technology 1. Seat belt Car seat belt is a safety device it can in car collision or sharp turn make crewto keep its original position as possible without mobile and rotation avoid collisionwith in-car hard parts caused damage. Seat belts and airbags as modern cars aresafety devices but the long history of the former popularize the scope. The seemingly simple seat belt actually not quotsimplequot. Attention has been atthe forefront of traffic safety through the analysis of general motors after a caraccident found: seat belt not only makes people protect the lives can be in morethan half of the accident to reduce or even eliminate drivers motorists are thechance of injury. Car collision or unexpected emergency braking force generatedgreat inertia will allow the driver and passenger and car windscreen steeringwheel seat collision happened objects such as secondary to drive is causedextremely easily crew serious damage even drive occupant seats or threw the apexseat belts can will ride in the seat. Bondage personnel When has the accidentwhich can effectively prevent the collision and its buffer role can absorbs a great 4 河北工程大学毕业设计deal of kinetic energy reduce rides personnel extent of the injuries. Fasten your seat belt airbags play our role is also an important condition.Because the airbag to maximize role for the ride in the impact of the physicallocation sitting instant action have extremely strict and the requirements.Otherwise the airbag started strong instantaneous wallops to head are fragile sitemay cause serious damage especially for children this damage can be fatal. Eventhe most ordinary three belts try a can timely in crash that lived rides the bundleensure the upper part of a ride in the airbag fully extended range make the airbagmost effectively play efficacy. Accordingly must not because the car is equippedwith airbags and feel carefree seat belt fastened only to reduce or eliminate thetraffic accident happen. 2. The airbag When the front collision happened strong because inertia who rides the bodyforward fast moving then seat belts and will try to quotpullquot rides on person the bodyabsorb some of the impact energy while the airbag with quotthe eyepiece trendquotinflatable and completely open Then the rides the upper body will sink to airbagsgas also began from the vent air uniform escaping and absorbed most of theimpact energy Subsequently the ride back seat and return to the body. Above thewhole process is almost always happens in a flash who rides the completely inpassive situation in this case the passive rely on auxiliary occupant protectionsystem is the only option. Airbags development design is based on the protectionon seat be
lt Co. LTD they cooperate with each other to ride the play the auxiliaryprotective effect. Seat belt usage in under the condition of the crew balloon help reduce chesthead and facial injuries in the seriousness of the collision. When car collisionhappened before the first is the car to stop motion car under the action of inertialforce crews to go forward with the original speed still sport. Not wearing a seatbeltcrews will and steering dish front windscreen together so it can be severely hurtWearing a seatbelt as car stop the crew can stop moving forward movement andgradually. If collision violent crew forward movement of the seat belts even fasterin the complete stop before motion still and in-car things together. If this fashion 5 河北工程大学毕业设计in steering the disk or within the popup balloon inflated dash it can protect theoccupant reduce the possibility of car together with things more uniformdispersion head chest absorb the impact energy of movement thus crew hasadded effect of seat belts. In addition to seat belts and airbags outside car passive safety technologyincludes car bumper automobile safety glass security body occupant head andneck protection system WHIPS etc. These vehicles to improve the safetyperformance has very important contributionThree. Automobile active safety new technology 1. Eye Car skills Eye Car technology can make each driver eyes in the same relative heightguarantee of pavement and the surrounding a six-lane unimpeded sight and bestvisibility. This technology can also offer a specific driving environment. Eye Car through the use of first-class motor mobile automatic will differentfigure drivers eyes tuned to the same height to solve the problem meanwhilevisibility of steering dish brake and accelerate pedals and floor and the centraladjustment to constitute console to their respective driving conditions. Meanwhileto the former pillar design will it again from drivers sights removed. Because thebus driver received the most crucial information generally have 90 from outsideacquired through the eyes observe. So this improvement for vehicle safety is ofgreat significance. 2. Cam Car technology Cam Car technology aims to help improve the driver of perception. Thetechnical features are: 1 Installed in the car to camera system on both sides before to make driverscan bypass the large vehicle behind a car or see ahead of pedestrians. In a typicaldriving situation in the crowded traffic the pilot of the centre-left cornering couldmore easily view the opposite of vehicles. 2 Side after buy video camera provides broader visual profile of vision. Thecamera coverage than traditional rearview mirror wants wide especially for the 6 河北工程大学毕业设计adjacent driveway. 3 Installed in a car the four miniatures sectored form to decorate after acamera can obtain the car panoramic perspective. Image via electronic synthesishas the zoom and 160 ° wide-angle ability. 4 quotnight eyequot Night Eye camera can be
in low illumination conditionswhen the car is in reverse gear even in a dark cases can also provide car closerange after small images.Four. Automobile passive safety new technology 1. Future airbags .