How Does Anti-lock Braking System (ABS) Technology In Cars Work?

ABS prevents the wheels from locking up, thus avoiding uncontrolled skidding of the vehicle and decreases the distance traveled without slipping.

Driving on expressways can be fun and thrill-inducing, as many of you surely know. One gets to unleash a car’s full potential. The city streets keep us grounded, but the moment you hit the street, there is no looking back. You will almost never see a car going below 100 km/hr.

The situation becomes particularly tricky during monsoons, as cruising in a car at such high rates is the perfect recipe for a disaster if the roads are slick. Even so, it does occur, so what do you do in a situation on a slippery road whenever you have to suddenly apply the brakes of your car? Without an anti-lock brake system, the wheels of your car stop spinning and the car will start to skid. You’ll completely eliminate control over the automobile safety and the results could be deadly.

Anti-lock braking systems (ABS) take a lot of the challenge from the sometimes nerve-wrecking event. In fact, on slippery surfaces, even professional drivers cannot stop as quickly without ABS as an average driver can with ABS.


What’s Anti-lock braking system (ABS) in automobiles?

As the name signifies, the anti-lock braking system is a security system in cars and other auto body shop victoria that keeps their wheels from locking up and helps their drivers to maintain steering control. Also known as the anti-skid braking system sometimes, it empowers the wheels of a car to keep tractive contact with the floor so that they don’t enter an uncontrolled skid.

With ABS, you have more control over your vehicle during situations like sudden braking. Basically, it’s designed to help the driver maintain some steering ability and prevent skidding while braking.


ABS Working principle

The fundamental concept behind anti-lock brakes is simple. It prevents the wheels from locking up, thus avoiding uncontrolled skidding. ABS generally offers improved vehicle control and decreases stopping distances on dry and slippery surfaces.

A skidding wheel (where the tire contact patch is slipping relative to the street ) has less grip (grip of the tire on the street ) than a non-skidding wheel. For example, if your auto body repair kingston drives over a street covered in ice, it’s not able to proceed and the wheels will keep spinning because no traction is present. This is because the contact point of the wheel is slipping relative to the ice.

ABS modifies the brake fluid pressure, independent of the amount of pressure being applied on the wheels, to bring the speed of the wheel back to the minimal slip level that is mandatory for optimal braking performance.


ABS has four major components:


1) Speed Sensor

This sensor monitors the speed of each wheel and determines the essential acceleration and deceleration of the wheels. It is composed of an exciter (a ring with V-shaped teeth) and a cord coil/magnet assembly, which generates the pulses of power as the teeth of the exciter pass in front of it.


2) Valves

The valves regulate the air pressure to the brakes during the ABS action. There is a valve in the brake line of every brake that’s controlled by the ABS. In the first place, the brake valve is open and it allows the pressure from the master cylinder to be transferred to the brakes. In the second place, the brake valve stays closed and pressure from the master cylinder to the brakes is constrained. In the third place, the valve releases some of the pressure on the brakes.

The next step is repeated until the auto body shop kingston comes to a stop. The resistance that you feel when braking suddenly at high rates is actually the brake valves controlling the pressure which has been transferred into the brakes from the master cylinder.


3) Electronic Control Unit (ECU)

The ECU is an electronic control unit that receives, amplifies and filters the detector signals for calculating the wheel rotational speed and acceleration. The ECU receives a signal from the sensors in the circuit and controls the brake pressure, according to the data that is examined by the unit.


4) Hydraulic Control Unit

The Hydraulic Control Unit receives signals from the ECU to use or release the brakes under the anti-lock conditions. The Hydraulic Control Unit controls the brakes by increasing the hydraulic pressure or bypassing the pedal force to reduce the braking power.


ABS in operation

While braking, if a wheel-locking scenario is detected or expected, the ECU alarms the HCU by sending a present and controls it to release the brake pressure, allowing the wheel velocity to increase and the wheel slide to decrease. When the wheel velocity increases, the ECU reapplies the brake pressure and limits the wheel slide to a certain degree (Note: When the braking action is initiated, slippage between the tire and the road surface in contact will happen, making the speed of the automobile different from that of the tire). The Hydraulic Control Unit controls the brake pressure in each wheel cylinder depending on the inputs in the system sensor. Because of this, this controls the wheel speed. This process is repeated for the next braking operation.

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