Rear-end Collisions Rear-end Collisions， in which one vehicle runs into the back of another， can be treated in the same way as head-on collisions， except that the closing speed is the difference between the two speeds， and， while the occupants of the striking car suffer a frontal impact similar to that experienced in head-on collisions and tend to travel forward with respect to the car， those in the struck car tend to travel backwards relative to the car and therefore apply forces to the back of the Impacts with Walls In impacts of cars with walls， at all angles of approach( the angle between long axis of vehicle and wall) more than about 40°(see F1)， the impact is effectively a head-on collision， though less severe than impacts at angles approaching 90°， and the front-seat occupants move towards the The velocity of impact with the windscreen， steering assembly or instrument panel decreases as the angle of approach becomes smaller， but is greatly influenced by the coefficient of friction between the car and the wall; for example， when the coefficient changes from 25 to 5( approximately from a wooden surface to a concrete wall)， the impact velocities of the occupants on the interior of the car are approximately After impact the car may rotate towards or away from the wall-towards the wall if friction with the wall is low， and/or the angle of approach is small， and away from it when the friction is high， and/or the angle of approach is 4 Intersection Collisions Almost all intersection car collisions involve a striking and a struck The striking car suffers mainly frontal impact， and the struck car a side In most such accidents the paths of the two cars are at right angles， probably at a crossroads or T The struck car is usually moving more slowly than the striking In one investigation about 50 per cent of the struck cars were judged to be travelling at less than 2omile/h(32km/h)， and in about 60 percent the angles between colliding vehicles were about 90°。车尾碰撞 所谓车尾碰撞，即其中一辆车撞到另一辆车的车尾，可以用对待车头对撞一样的方式处理，除了闭合速度(好像是和排挡有关)是两者之间速度间的差别，同时碰撞的汽车驾驶者遭受正面撞击类似经历的正面碰撞的汽车，那些被困住的车会向后倒车，因此强加力于后座。 与墙体的影响 在汽车的影响与墙，在各个角度的办法（之间的夹角长轴车和墙）超过约40 ° （见F1 ）的影响，实际上是一个迎头相撞，但不是那么严重的影响角度接近90 ° ，和前座乘员朝着挡风玻璃。 速度的影响与挡风玻璃，方向盘组装或仪表板随角度的办法变小，但影响较大的摩擦系数之间的汽车和墙;例如，当变化系数从25到5 （大约从一个木制表面的混凝土墙） ，速度的影响的住户的室内汽车大约增加了一倍。 影响后车可旋转的或远离墙对墙摩擦，如果墙上低，和/或角的做法是小国，并远离它时，摩擦是很高，和/或角做法是大。 第4交叉口碰撞 几乎所有的汽车碰撞交汇涉及一个突出和一个击中汽车。汽车的罢工主要是受到锋面影响，并击中车侧的影响。在大多数这类事故的道路两辆赛车都成直角，可能在一个十字路口或Tjunction 。该组织通常是赛车运动更为缓慢的惊人车。在一个调查，百分之五十的击中汽车被认为是行驶不到2omile /小时（ 32公里每小时） ，并在大约百分之六十之间的角度相撞车辆约90 ° 。 语法绝对没问题的 谢谢采纳
The society entered the information network time， the people no longer satisfy to the automobile request one kind of riding instead of walking tool， hoped the automobile is the life and the operating region one kind extends， on automobile on elephant in own office and family same work and At the same time， the automobile computerization also day by day rapidly develops， was considered is in an automobile technological development advancement revolution， the automobile computerization degree is weighs by regarding as the modern automobile level the important But along with the computer technology， the communication technology， the integrated circuit technology rapid development， take the numeral field bus as representative's scene measuring appliance， the equipment massive applications， a tedious scene segment bed sheet succinct field bus network replaces， the signaling quality also greatly enhances， the automobile also starts to march into the network In the near ten years， the user regarding automobile comfortableness， the security as well as the environmental protection and so on each performance request enhances In order to meet the need which these increase day by day， on the automobile the computer controls the electronic electric appliance equipment sharp growth， causes the automobile (is specially passenger vehicle) designs the electric appliance line arrangement to be more and more In addition， because because on the automobile each kind of electronic electric appliance meets the point insertion quantity along with it sharp increase， in the automobile travel process meets the point insertion the breakdown to create on the automobile the electronic electric appliance equipment malfunction question to be more and more In order to solve the above problem， very many new vehicle types (are specially upscale vehicle type) in the development starts widely to apply the computer network This article introduced the computer network technology in the automobile the application basic principle， elaborated the networking in the automobile interior and exterior application situation， introduced the automobile interior network characteristic and the automobile interior network standard， with emphasis narrated the control confined network CAN principal characteristic and the According to the automobile driving quality function influence division， may the automobile electronic products induction be two kinds: One kind is the automobile electronic control， including engine， chassis， automobile body electronic One kind is the vehicle carries the automobile electronic installation， including the automobile information system， the guidance system， the automobile sound and the television entertainment system， the vehicle carries the communications system， the surfer equipment and so Keywords: automotive， computer networks， local area network control， network standards
With the entry of informative network times is comimg， people are not simply satisfied with Atuo as the means of walking replacement， but to expect it can be closely related life to work， just as we work in the office or at home while we take the Meanwhile， Auto electronic rapid developing is regarded as the revolution of Auto technology E-vehicle developing level is one of the key points to measure modern auto Followed the rapid development of comupter， telecommunication and integrated circuit technology， the typified digital field bus of field instrument and other related instruments widely used， and the complicated live link are replaced by simple live network link， the quality of signal transmission becomes much better than before， so that Auto gradually enters internet In reccent decade， customers have higher quality on comfort， security， eco-friendliness of A To meet these increasing demands， many electronic equipment controlled by computer is sharpely increasing in Auto， as a result of line connection becomes more difficult in Auto， especially in Besides， the quantity of electronic line point shows Inevitably it’ll has some troubles or blocks in So that many new model or high-level model auto is using network technology in the process of research to solve these This essay talks about how network is used in inner and outer auto， refering to the characteristic and standard of inner network used in A While the key point is to emphasise on the main features and using of controlling local area According to driving performance， auto electronic products could be classified as followings: one is Auto electronic control devices， including engine， chassis and body electronic The other is car electronic devices， including motor vehicle information systems， navigation systems， car audio and video entertainment systems， automotive communications systems， internet equipment
As the society develops， more and more cars drive in ordinary Chinese Admittedly， cars bring us much convenience and improve our life a lot However， there are also many proplems arisng in daily life，such as traffic jams and traffic accidents， which do lots of harm to families and the whole Every year many people get hurt or lose their lives in traffic We students should pay much attention to traffic safety when walking near the First， we must obey the traffic It is good to go along the sidewalk and wait for the green "walk" Second， before going across the roads， we must look both ways There is no need to Third，we should never play on the Fourth， we can try to pe
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