Anti-lock Braking System (ABS) Explained :-What is ABS?How Does it Work?


We use Anti-lock braking system in our day to day vehicles like cars. It is a safety feature that is seen in almost every car that gets launched in the world. It is also used on an aircraft. So in this article let's Untangle what is ABS? & how this Technology works?.

What is ABS?
An anti-lock braking system (ABS) is a safety anti-skid braking system used on aircraft and on land vehicles, such as cars, motorcycles, trucks, and buses. ABS operates by preventing the wheels from locking up during braking, thereby maintaining tractive contact with the road surface.

Let's Understand Anti-Lock Braking System with the help of a Video


How does Anti-lock Braking System Works?
ABS prevents the wheels from locking up, thus avoiding uncontrolled skidding of the vehicle and decreases the distance traveled without slipping. Without an anti-lock brake system, the wheels of your car stop spinning and the car will begin to skid. You’ll completely lose control over the car and the results can be deadly.ABS generally offers improved vehicle control and decreases stopping distances on dry and slippery surfaces.

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.

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Location: India

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