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    Home » How Your Car’s Anti-Lock Braking System Functions
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    How Your Car’s Anti-Lock Braking System Functions

    FaisalBy FaisalOctober 30, 2014Updated:October 30, 2014No Comments3 Mins Read
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    Before there were Anti-lock Braking Systems (ABS), drivers were told to rapidly pump their brakes when they felt a tire start to skid. Today, you don’t need to do this because anti-lock braking systems do it for you. In this article, we’ll learn about anti-lock braking systems and how they work.

    Car’s Anti-Lock Braking System

    The operational theory starts with the fact that a skidding wheel has less traction than a non-skidding one. The best thing to do when a skid does occur, then, is to slow your tires down by pumping the brakes and letting all the tires “grab”. ABS systems do the same thing, they sense when a wheel is skidding during braking and then they pulse the brake automatically. You don’t have to do it. This not only allows you to stop in a shorter distance, you’ll be able to regain your steering control too. ABS systems are made up of four components:

    • Speed Sensors – They sense when a wheel is about to lock up.
    • Brake Line Valves – There is a valve in the brake line of each brake. This electrically-controlled valve controls the pressure going to each brake assembly.
    • Electric Pump – When a brake line valve reduces the pressure in a brake line, there is an electric pump to restore the pressure.
    • ABS Controller – The ABS controller is a small computer that runs the whole ABS system.

    The ABS Controller is the brain of the system. It constantly monitors the four wheel speed sensors, looking for speed decelerations out of the ordinary in any of the four wheels. The ABS controller knows that rapid deceleration is “technically impossible” under normal driving conditions, so it reduces the brake line pressure to the brake involved until it sees it speed up again. The result: this gives the system maximum braking power. Note that 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.

    So, have you ever wondered what you should do when your car starts to skid? First, you do not need to pump your brakes! The ABS system does this for you. In an emergency stop in a car with ABS, you should just apply your brake pedal firmly and hold it while the ABS does all the work. You will feel a pulsing in the pedal that may be quite noticeable but this is completely normal. When your ABS system is functioning properly, you should have some steering control quickly return so use that to get back on course.

    Source: Earnhardt of Gilbert

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    Faisal

    Full time and dedicated blogger who loves to read and write everything about newest cars, exploring and hence, love to ride old classic cars!

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