You are currently browsing the tag archive for the ‘ABS’ tag.


Whether it was necessary to you to go round suddenly arisen obstacle and simultaneously to brake? For certain yes. It would Seem that in it difficult — has pressed a brake, has turned a wheel and has corrected a trajectory. However all is rather simple till the certain moment. If at emergency braking to press a pedal of a brake is stronger, than it is necessary, wheels can be blocked and …

Two variants of succession of events Further are possible. Both are caused by presence or ABS — Anti-lock Brake System. If the car archaic, conducts the family tree from the middle of the seventieth last century or has descended from the conveyor of one of domestic car factories, that, is as though assiduous you twisted “steering-wheel”, the vehicle of a trajectory will not change. The matter is that the blocked wheels, sliding, deprive of the driver of possibility to maneuver — having broken on skid, the car it will be stupid to go on a straight line as if at it have chopped off a wheel. Only skilled pilot will manage to unblock coolly wheels, for an instant having released a brake pedal. And then, using pulse braking, to return the control and to reduce speed. The second variant — for the car equipped ABS. From the driver it is required to press more feasibly only a pedal of a brake and easy to work as a wheel. Feel a difference? For 30 years the system has undergone strong changes. In tens times speed and quantity of cycles of operation for a time unit have increased. So, for example, the first blocks of management for cars weighed more than 7 kg. Modern much more compactly also pull kg on ones and a half.

Blocking is dangerous also that is capable to become the reason of drift or car withdrawal aside. Occur it can, when under wheels a diverse covering, loading on axes is strongly changed during the previous maneuver or there are different tyres (the last sounds wildly, but in Russia, alas, not a rarity). Besides, at the blocked wheels the car can change a trajectory under the influence of any lateral force (a bias of road or collision). To correct a trajectory in this case it is almost impossible. In ABS for definition of speed of rotation induction gauges of frequency and the gauges working on effect of the Hall are used. Each new generation of wheel gauges of frequency of rotation becomes less, more precisely and more reliably. At first one sensor control which was mounted on a reducer of the back bridge or a check point was established only. Later to it two were added more — on forward wheels. And only in last versions ABS installation of gauges on each wheel, accordingly, with individual modulators is provided. By the way, the most ancient and primitive single-channel ABS influenced at once all brake mechanisms. One more negative effect of blocking — increase in a brake way. Here all the matter is that force of a friction of rest usually is more than force of a sliding friction. Hence, for as much as possible fast stop of the car it is necessary to generate such size of pressure in brake highways that wheels at braking rotated on the verge of blocking. There is such important indicator, as relative slip. It depending on degree of block of a wheel can vary from zero (the wheel slides without slip to 100 % (the wheel is completely blocked). It is experimentally established that peak efficiency of braking is reached at 15–20-% slip — that is in that case, when speed of rotation of the braked wheel on 15–20 % below speed free-rotary wheels at constant speed of movement of the car. Running forward, say, that electronics at braking supports this size, periodically blocking and deploy wheels.

Into structure of almost any modern system ABS enter: the electronic block of management (1), the modulator (2) changing pressure in hydraulic highways, gauges of angular speeds of rotation of the wheels (3), the naves of a wheel established on an internal part. The progressive mankind has definitively realised harm of the blocked wheels only in 70 last centuries. The pioneer in the field became Mercedes-Benz, together with company Bosch developed system which in 1979 began to be established on S-class Mercedes. The main principle of work ABS has been generated then, and then only was improved. Modern electronics (ABS,  the system, ESP) to keep control of cross-section and longitudinal dynamics of the car, considers not only frequency of rotation of wheels. The wheel angle of rotation, degree of a list of a body, acceleration … Pressure in brake contours are under control is generated on set of the received data, plus in certain cases compulsorily changes draught of the engine. Problem ABS — to regulate speed of rotation of wheels by change of pressure in highways of brake system. To supervise angular speed, it is necessary to know its size and how it varies in due course. Each wheel is supplied by the gauge which gives out electric impulses with the frequency proportional to speed of rotation of a wheel. This information arrives in the block of management ABS.

If during braking angular speed of a wheel has come nearer to zero, the artificial intelligence there and then will make its decision. The hydraulic modulator by means of the electrovalve will pit pressure from a highway and will redirect “a superfluous” portion of a brake liquid to the hydroaccumulator. Pressure will decrease until a wheel, again “having grasped” a covering, will not be untwisted till certain speed. Further ABS again will sharply increase pressure in a highway and will brake a wheel. The cycle will proceed until the car will not stop or the driver will not weaken pressure upon a pedal before position when ABS it is not necessary. Systems existing in the market differ rather exact adjustment and provide peak efficiency of braking. Many will tell: «the knowledge Is insignificant!» Falteringly it is possible to brake also most. And the truth: in many cases such way of delay on the cars which have been not equipped ABS, allows to go round suddenly arisen obstacle during emergency braking. When wheels are blocked — you brake, as soon as “are released” — have an opportunity to correct a movement direction. Naturally, in this situation the brake way considerably will increase, but the driver will have an opportunity to go round an obstacle and anticipatory action of a wheel to extinguish drift. But, unfortunately, any titled racer is not capable to provide «ration» braking with frequency from which it does ABS. The system (depending on an execution variant) for a second has time to block-unblock wheels about 15 times. Besides the driver simultaneously influences all brake mechanisms (so the first systems ABS worked) while modern 4-channel antiblocking systems watch speed of rotation and regulate brake effort for each wheel separately.

In the majority of modern cars ABS works together with EBD (Electronic Brake Distribution) — system of distribution of brake efforts which doses out intensity of braking for each wheel. C EBD it is possible to brake safely in turn and on . Electronics on a difference of frequencies of rotation will understand that wheels have got on sites with a diverse covering, and will reduce brake forces on wheels which have the best coupling with road. By the way, intensity of delay in this case will decrease and will be defined by force of a friction of the wheel (wheels) having the worst coupling with road. It is not out of place to notice that for peak efficiency of delay the brake pedal on cars with ABS should be pressed into a floor that there are forces. However, the last to do to not necessarily those drivers, whose cars are equipped by system Brake Assist, which itself creates superfluous pressure in a brake highway,  for the weak or irresolute person. At regular delays it does not interfere. However sharp pressing (blow) pedal Brake Assist regards as a signal to emergency braking and comes into effect. At braking on diverse coverings electronics will make everything to resist to drift. But sometimes the car equipped ABS and EBD, can develop strongly enough. Here all depends on how the system is adjusted.

Advertisements

RSS car lada – Google News

  • This RSS feed URL is deprecated 23/06/2018
    This RSS feed URL is deprecated, please update. New URLs can be found in the footers at https://news.google.com/news
  • Lada car reward for Serbia's match-winner Aleksandar Kolarov - The National 18/06/2018
    The NationalLada car reward for Serbia's match-winner Aleksandar KolarovThe NationalSerbia's Aleksandar Kolarov had a good day in Samara: he scored a magnificent World Cup goal and was presented with a Lada by the governor of Samara. The Roma defender struck a thunderous second-half free-kick that clinched Serbia a 1-0 victory over ...Serbia's […]
  • Iceland fans show their Viking spirit - in a Lada - Reuters 20/06/2018
    ReutersIceland fans show their Viking spirit - in a LadaReuters... a Lada after a journey from home to Russia to watch their team against Nigeria, in Volgograd, Russia June 20, 2018. REUTERS/Ueslei Marcelino. “It's the spirit of adventure,” Jonsson said as he showed off the car near the Volgograd Arena on Wednesday.and more »
  • Serbia's Kolarov given car for World Cup goal - Channel NewsAsia 18/06/2018
    Channel NewsAsiaSerbia's Kolarov given car for World Cup goalChannel NewsAsiaMOSCOW: Serbia's Aleksandar Kolarov had a good day in Samara: he scored a magnificent World Cup goal and was presented with a Lada car by the governor. The Roma defender struck a thunderous second-half free-kick that clinched Serbia a 1-0 victory ...and more »
  • Head of House of Romanovs drives over Crimean bridge in Russian-made Lada car - TASS 03/06/2018
    TASSHead of House of Romanovs drives over Crimean bridge in Russian-made Lada carTASSSIMFEROPOL, June 3. /TASS/. Grand Princess Maria Vladimirovna, the head of the Imperial House of the Romanovs, and her son, Grand Prince Georgy Mikhailovich, drove on Saturday in a Russian-built Lada Largus car over the bridge connecting Crimea ...and more »
  • Once the butt of every car joke, why the Lada could be having the last laugh thanks to the World Cup - Mirror.co.uk 14/06/2018
    Mirror.co.ukOnce the butt of every car joke, why the Lada could be having the last laugh thanks to the World CupMirror.co.ukThousands of England fans heading to Russia for the World Cup can take a trip down memory lane - and revive those old Lada jokes. For the car that was the butt of a stream of gags in the Nineties may have disappeared from UK roads but i […]
  • Forget the Football World Cup – save a Lada! - AutoClassics 13/06/2018
    AutoClassicsForget the Football World Cup – save a Lada!AutoClassicsAlthough the car's square bulk and immense frame could easily shrug off a Trump-North Korea nuclear winter, between 1994 and 2005 the number of licenced Ladas fell from 134,297 to little under 3000. A tarnished image and all the second-hand market ...
  • DA warns potential car buyers about scams - Santa Clarita Valley Signal 22/06/2018
    Santa Clarita Valley SignalDA warns potential car buyers about scamsSanta Clarita Valley SignalWhen signing a contract to purchase a new vehicle, buyers must always read the fine print, according to a warning issued Friday by the Los Angeles County District Attorney's Office. “In the Automobile ... In response, LADA media staff offered the ...
  • Are Russia's best-known cars enjoying a World Cup renaissance - Motor1.com UK 13/06/2018
    Motor1.com UKAre Russia's best-known cars enjoying a World Cup renaissanceMotor1.com UKBetween 1977 and 1997, Lada sold more than 300,000 of these cars in Britain. It's no surprise, then, that in 1994 – the year England last failed to qualify for the World Cup – UK roads were positively teeming with Ladas. More than 134,000 of them were ...and more […]
  • Will An Old Lada Still Drive With 5 Tons Of Concrete Inside? - Motor1.com 05/06/2018
    Motor1.comWill An Old Lada Still Drive With 5 Tons Of Concrete Inside?Motor1.comWhen you have an insatiable drive for knowledge, a YouTube channel, and enough mechanical know-how to get yourself into trouble, you find whacky and weird things to do with cars. Take Garage 54 ENG – an English-dubbed YouTube channel for Гараж ...Filling A Car With Five Tons Of C […]
Advertisements