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Thread: Explain To Me How ABS Works...

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    Default Explain To Me How ABS Works...

    Guys,
    please explain to me how ABS works and Stops the car Widout Skidding...And it doesn't even increase the stopping distance...
    ' The Only easy day....Was Yesterday. '..........'Never Give up, Never back down'

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    ABS stands for AntiLock Braking System

    What happens in an ordinary braking system is that when hard breaking is applied on high speed, the brakes jam the tyres causing it to skid or slip on the road surface and actually the car loosing its control.

    As contarary to this, ABS works is such a manner that the brakes are applied and released multiple times within a second, example like 30times/second and by which the tyres actually are not Jammed and released and Jammed so many times within a second that it JAMs but the affect overall is as if it did not Jam or lesser skidding of tyres on the road surface causing the brakes to be more effective stopping the car in same time/distance but without skidding or little skidding but actually not loosing control.

    Cheers
    I am back & still "Keeping my fingers crossed"

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    Default

    It bites, releases, bites, releases the breaks results in no tyre locks and shorter stoping distance.
    Thy name is Sumair Thy love Skyline Thy is very interested in DRIFTING Thy has PHD in drifting from the university of Street Racing!!

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    The ABS System

    The theory behind anti-lock brakes is simple. A skidding wheel (where the tire contact patch is sliding relative to the road) has less traction than a non-skidding wheel. If you have been stuck on ice, you know that if your wheels are spinning you have no traction. This is because the contact patch is sliding relative to the ice (see Brakes: How Friction Works for more). By keeping the wheels from skidding while you slow down, anti-lock brakes benefit you in two ways: You'll stop faster, and you'll be able to steer while you stop.

    There are four main components to an ABS system:

    * Speed sensors
    * Pump
    * Valves
    * Controller


    Anti-lock brake pump and valves

    Speed Sensors
    The anti-lock braking system needs some way of knowing when a wheel is about to lock up. The speed sensors, which are located at each wheel, or in some cases in the differential, provide this information.

    Valves
    There is a valve in the brake line of each brake controlled by the ABS. On some systems, the valve has three positions:

    * In position one, the valve is open; pressure from the master cylinder is passed right through to the brake.
    * In position two, the valve blocks the line, isolating that brake from the master cylinder. This prevents the pressure from rising further should the driver push the brake pedal harder.
    * In position three, the valve releases some of the pressure from the brake.

    Pump
    Since the valve is able to release pressure from the brakes, there has to be some way to put that pressure back. That is what the pump does; when a valve reduces the pressure in a line, the pump is there to get the pressure back up.

    Controller
    The controller is a computer in the car. It watches the speed sensors and controls the valves.

    ABS at Work
    There are many different variations and control algorithms for ABS systems. We will discuss how one of the simpler systems works.

    The controller monitors the speed sensors at all times. It is looking for decelerations in the wheel that are out of the ordinary. Right before a wheel locks up, it will experience a rapid deceleration. If left unchecked, the wheel would stop much more quickly than any car could. It might take a car five seconds to stop from 60 mph (96.6 kph) under ideal conditions, but a wheel that locks up could stop spinning in less than a second.

    The ABS controller knows that such a rapid deceleration is impossible, so it reduces the pressure to that brake until it sees an acceleration, then it increases the pressure until it sees the deceleration again. It can do this very quickly, before the tire can actually significantly change speed. The result is that the tire slows down at the same rate as the car, with the brakes keeping the tires very near the point at which they will start to lock up. This gives the system maximum braking power.

    When the ABS system is in operation you will feel a pulsing in the brake pedal; this comes from the rapid opening and closing of the valves. Some ABS systems can cycle up to 15 times per second.
    Explain To Me How ABS Works -781662


    Explain To Me How ABS Works -781663




    Explain To Me How ABS Works -781664



    HOPE THE ABOVE INFO IS SATISFACTORY.......



    xxx

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    Does the tire matter?Or does the grip of the tire matter?
    ' The Only easy day....Was Yesterday. '..........'Never Give up, Never back down'

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    Default

    Basically, with ABS the wheels don't lock so they won't harm ur tyres, therefore you'll be able to steer where ever you like when you do an emergency brake but if you don't have ABS, then that's not possible as the tyres will lock up resulting in no steering at all.
    Thy name is Sumair Thy love Skyline Thy is very interested in DRIFTING Thy has PHD in drifting from the university of Street Racing!!

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    Default

    its like at high speeds, when yew brake, its brake, loose, brake, loose and it goes on till the car stops, its to make the car nt skid
    Thy name's 'Fahad'. Powered by D16™​.

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    Default

    no wat i mean is that haveing a good grip tire result in shorter stopin distances?
    ' The Only easy day....Was Yesterday. '..........'Never Give up, Never back down'

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    But do the passengers feel that the cars is braking and loose?i mean do they get jerks?
    ' The Only easy day....Was Yesterday. '..........'Never Give up, Never back down'

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    Default

    no ..! no jerks..
    only driver shall feel pumping in the brake pedall...
    nothin else..
    http://www.pak-photographers.com

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    Default

    ^^u mean that driver feels Brake pedal jerking under his foot automaticaly?^^
    ' The Only easy day....Was Yesterday. '..........'Never Give up, Never back down'

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    Default

    hmhmh...nicely explain by damriol !!!

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    Saad_Hummer_akon, you feel the vibration in the brake pedal ONLY when ABS is in fact engaged. ABS does not engage every time your press your brake pedal, only when ABS system detects an impending wheel lock. Most of the time, under NORMAL driving conditions, ABS does not engage, since the brakes are not locking the wheels only providing enough friction to slow down the rotation.
    My opinions, suggestions and thoughts are strictly my own. I reserve the right to be human and make mistakes.

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    Once again...THanks to PAKWHEELS...Thank u guys!
    ' The Only easy day....Was Yesterday. '..........'Never Give up, Never back down'

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    Default

    MODS u can delete this topic now...
    ' The Only easy day....Was Yesterday. '..........'Never Give up, Never back down'

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