Automotive safety systems and technology rearch and analysis
As traffic tools of the modernization and absolute number increa sharply， traffic accidents are also increasing. Car accident has become vere global social issues。 Undoubtedly, advanced auto safety facilities are the driving safety indispensable safeguard。 So， we should start, from technology to rearch and development of high performance， high safety car， also want to strengthen the regular inspection in cars, so timely maintenance investigation, make cars often in good technical status， so as to improve the safety performance of the car。
Here we introduced active safety technology and automobile car passive safety technology. Auto safety is according to the traffic accident happened before and after the classified. One is in a traffic accident take safety measures, especially before immediately will produce risk condition, drivers manipulate the steering wheel avoid or emergency brake to avoid traffic accidents. In the car, drive in usually to ensure the basic manipulation stability, drivers on the surrounding environment and to ensure the visual recognition x drive the car itlf，
developed the basic performance ant-lock braking system （ABS）， prevent slippery drive system （ASR), active suspension， power steering and four-wheel drive (4WD), four—wheel steering （4WS）， lighting system, wiper， the rearview mirror， prevent from rear—end collision car alarm system and lar radar, etc。 The curity devices and technology， called active safety system, can also be called preventive curity system。 On the other hand， in order to reduce traffic accidents and company by personnel directly suffer degree， ensure company take staff and pedestrian safety, says the curity for passive safety, can also be called conflict safety. When after the accident, in order to prevent disasters， including prevent the expansion of fire and make crew from traffic accident can extricate the curity devices and systems， called prevent disaster expand curity system.
monday morningOne．农副产品税率>寒假作业答案五年级Automobile active curity technology 怎样处理好人际关系
1. ABS braking system
Ant-lock Braking System (Braking System， lock do by ABS computers as ABS)， hydra
ulic device, the wheel speed nsors, brake hydraulic pipeline and electrical wiring etc. Their structures are shown below.
ABS tasled for the car in various driving conditions braking performance and brake safety particularly important， especially is emergency braking， can make full u 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 increa the automobile braking process control. So as to reduce the possibility of car accidents. unclesam
No installation ABS car, if the driving force trample brake pedal, wheel will rapidly lower speed， and finally wheels stop turning， but body becau 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 automobile lateral spreads almost disappear, so poor force will appear the following phenomena:
多余的英文
(1） Steering stability fall： the steering wheel is ineffective， vehicle tail manipulation of
curl， rious when vehicle circles or appear folding phenomenon；
nowadays（2） Handling fall: manipulate the steering wheel and short of steering requirements;
（3) Braking distance extended: more than general braking distance。
雅思口语话题题库So, we can imagine to have installed ABS system of the car safety is very important.
2．花圃的意思the ASR drive torque control system
ABS are ud to prevent car braking process wheel 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 increa of vehicle performance requirements， not only in braking process required 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） Slip。 ASR is the perfect complement and ABS ASR，
but most alone is t with ABS combined together， commonly ud ABS/ASR says, called antiskid control system。
ASR is mainly ud to prevent car in the beginning, accelerate the wheels, guarantee slip in the car accelerated rate and improve the stability 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 becau ASR slip, can maximize 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英文经典歌曲．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， inevitably by lateral and longitudinal force, only local surface can provide full lateral and longitudinal force, the pilot can control vehicles。 If the ground adhesion ability lower lateral, will damage cars driving ability predetermined direction。 Rainy days cars driving, often high-speed steering lateral sliding out, it is the ground becau of insufficient lateral adhesion ability。 To resolve the issue, and developed countries automobile industry recently in ABS/ASR system on the basis of the development of dynamic Control system (into car Dynamics Control, the abbreviation VDC Vehicle). The system of the car brake， driving, suspension， steering， engine and so on various main asmbly control system in function， structure organic ground comprehensive together， can make cars in all kinds of bad working conditions， such as ice road pavement， commuting, river bend pavement and took evasive action moving line， braking and acceleration and the downhill for different conditions, such as bearing， different type pressure and different levels of type wear all
have good direction stability， to show the best driving performance. VDC applications, in braking， acceleration and steering aspects of driver's fully relead request, is the car of active safety driving a new milestone.
