Electronic brakeforce distribution or EBD or EBFD is an automobile brake technology that automatically varies the amount of force applied to each of a vehicle's brakes， based on road conditions， speed， loading， Always coupled with anti-lock braking systems， EBD can apply more or less braking pressure to each wheel in order to maximize stopping power whilst maintaining vehicular [1][2] Typically， the front end carries the most weight and EBD distributes less braking pressure to the rear brakes so the rear brakes do not lock up and cause a [3]How ABS worksUnder heavy braking， vehicle wheels may lock- The anti-lock braking system (ABS) monitors wheel speeds and releases pressure on individual wheel brake lines， rapidly pulsing individual brakes to prevent lock- During heavy braking， preventing wheel lock-up helps the driver maintain steering Modern ABS has four individual brake lines for each wheel， enabling different braking pressure on different road For example， less braking pressure is needed to lock a wheel on ice than a wheel which on bare If the left wheels are on asphalt and the right wheels are on ice， during an emergency stop， ABS detects the right wheels about to lock and reduces braking force on the right wheels， helping to avoid lock-up and loss of vehicle How EBD worksAs per SAE technical paper #920646 - Buschmann et "The job of the EBD as a subsystem of the ABS system is to control the effective adhesion utilization by the rear The pressure of the rear wheels is approximated to the ideal brake force distribution in a partial braking To do so， the conventional brake design is modified in the direction of rear axle overbraking， and the components of the ABS are EBD reduces the strain on the hydraulic brake force proportioning valve in the EBD optimizes the brake design with regard to: adhesion utilization; driving stability; wear; temperature stress; and pedal "EBD may work in conjunction with ABS and Electronic Stability Control ("ESC") to minimize yaw accelerations during ESC compares steering wheel angle to vehicle turning rate using a yaw rate "Yaw" is the vehicle's rotation around its vertical center of gravity (turning left or right) If the yaw sensor detects more/less yaw than the steering wheel angle should create， the car is understeering or oversteering and ESC activates one of the front or rear brakes to rotate the car back into its intended For example， if a car is making a left turn and begins to understeer (the car plows forward to the outside of the turn) ESC activates the left rear brake， which will help turn the car The sensors are so sensitive， and the actuation is so quick that the system may correct direction before the driver ABS helps prevent wheel lock-up and EBD helps apply appropriate brake force to make ESC work
多了打不下，自己扩充一下。Isn't it great when a plan comes together? A few months ago Beijing was fretting about an apparent collapse in demand for Muted sales data – sales of passenger cars fell 35 per cent between March and August – suggested that China would be lucky to get anywhere near its target of shifting 10m vehicles in Some pretty blunt instruments later – tax cuts and subsidies for smaller vehicles – and autos are flying off the With 7m new vehicles shifted in the first quarter (up 4 per cent year on year)， China has zoomed past the US (2m， down 38 per cent) as the world's largest At that run rate， Beijing will beat its 2009 target by early D No wonder this week's Shanghai auto show is more festive than equivalent events in the west， which are being scaled back or canned But delegates should keep some champagne on Automakers are not necessarily looking at better profits: minivans mean mini- Sales of vehicles with bigger engines are falling， as they are everywhere This year's overall improvement in sales is almost certainly linked to rampant credit growth， which the banking regulator last week said it was looking to And the industry continues to grapple with structural demand Take cars: sales growth averaged about 40 per cent a year in the six years to 2008， when annual growth slipped to 7 per Even with the punchy start， 2009 is set for about 5 per cent， estimates C For a country with third-world penetration – 32 cars per 1，000 people in 2007 (compared with 800 in the US) – that kind of growth is hardly Chinese savings rates are among the highest in the world， implying huge potential for But as Morgan Stanley points out， given off-book liabilities such as retirement， healthcare and education， the average consumer is practically in negative In spite of Beijing's inducements， households may continue to prioritise these invisible debts over a new set of 一项计划的出台不是很棒吗？几个月前，中国政府为汽车需求锐减而烦恼不已。从去年3月至8月，乘用车销量减少了35%。疲软的销售数据表明，中国要是能接近实现2009年销售汽车1000万辆的目标就算走运了。采取了一些相当直接的措施（对小排量汽车下调购置税并提供补贴）后，汽车销量急速上升。今年第一季度中国新车销量达270万辆，同比增加4%，超越美国（220万辆，同比减少38%）成为世界第一大汽车销售市场。以这种增长速度，中国政府在12月初就能完成2009年的目标。难怪与西方规模缩减或压缩在一起举行的同类展会相比，本周的上海车展更具节日的欢乐气氛。但参展代表们先别忙开香槟庆祝。汽车制造商不一定能实现更多利润：微型车意味着微利。和世界其它地区一样，大排量汽车的销量正在减少。今年销量的总体改善几乎必定与信贷的高速增长有关——中国银行业监管部门上周已表示将注意控制。而汽车制造业还要继续努力解决结构性需求问题。以轿车为例：截至2008年的6年里，轿车销量以每年40%的平均速度增长，但2008年放缓至7%。虽然开局有力，但据花旗(Citi)估计，2009年汽车销量增幅可能在5%左右。对于一个汽车普及率仅为第三世界水平的国家——2007年，每千人拥有32辆汽车，而美国每千人拥有800辆——这种增长根本算不上惊人。中国的储蓄率位居世界前列，意味着巨大的消费潜能。但正如摩根士丹利(Morgan Stanley)指出的那样，如果考虑到退休、医疗和教育等账外债务，中国普通消费者实际上是负资产。因此，尽管中国政府采取了一系列刺激措施，但与购置新车相比，老百姓可能还是会优先考虑那些无形的债务负担。
Society into the information network era， the requirements of the vehicle no longer be satisfied with a means of transport， but also want to live and work car is an extension of the scope， in the car like in their own office and home work and At the same time， the growing automotive electronics and also the rapid development of automotive technology was considered in the development process of a revolution of automotive electronics is a measure of the degree is seen as an important level of Hyundai Motor With computer technology， communication technology， the rapid development of integrated circuit technology in order to figure represented Fieldbus field instrument， equipment， a large number of applications， red tape has been the scene of a single simple connection of fieldbus networks in place of， the quality of signal transmission also greatly improved， cars have begun to enter the Internet A In the last decade， the users of motor vehicles for the comfort， safety and environmental requirements such as performance In order to meet these ever-increasing demand for computer-controlled vehicle electrical and electronic equipment increased dramatically， making vehicles (especially cars) the design of the layout of electrical circuits has become increasingly In addition， a variety of automotive electrical and electronic connector of the ensuing surge in the number of motor vehicles traveling on the course because of the failure point connector automotive electrical and electronic equipment on the issue of failure to perform its functions more and more To address these problems， many new models (especially the high-end models) the beginning of the development of the wider use of computer network In this paper， computer network technology in the automotive application of the basic principles of network technology on the inside and outside the vehicle， the introduction of the internal network， introduced the characteristics of automotive and automotive standards for the internal network， focuses on the control of the main local area network CAN characteristics and their Vehicle performance in accordance with the role of the impact of division of motor vehicle electronic products can be summarized as two types: one is the automotive electronic control devices， including the engine， chassis and body electronic One is car-car electronic devices， including motor vehicle information systems， navigation systems， car audio and video entertainment systems， automotive communications systems， Internet
