May 21 2019

Anti Lock Braking System: How Does ABS work in Cars?

Antilock braking system is an active safety system in car. It prevents the wheels from locking up when brakes are applied and avoids the uncontrolled skidding of the vehicle.

Highway driving brings fun and excitement and many people feel like a racing driver. Sometimes the Car is released to go to its full potential. Due to confined space in city roads, the cars remain in limits. However, it is not the case for highways where low speed cars are not that common sighting.

The situation in monsoon can be tricky as the roads become sleek and the risk of a crash is increased. So, what you do in these situations if you have to suddenly apply brakes? Without ABS the wheels of your car stop spinning and the car will begin to skid. The consequences can be deadly if you lose the control over the car.

It is where anti-lock brakes system comes to help. With the help of ABS, even the average drivers can stop quickly on the slippery roads.

What is Anti-Lock Braking System?

As the name suggests, anti-lock braking system is a safety system in cars and vehicles that keeps their wheels from locking up and assists the drivers to maintain steering control. It maintains the tractive contact of the wheels with the ground preventing them from going into uncontrolled skid. ABS provides you more control over your car when you apply sudden braking.

ABS Components

Anti-lock braking system works with four components which are speed sensor, valves, electronic control unit (ECU) and Hydraulic control unit.

Working Principle of ABS

The working principle of anti-lock brake system is simple. If a wheel-locking situation is anticipated the electronic control unit (ECU) alerts the Hydraulic control unit (HCU) with a current and directs it to release brake pressure, allowing the wheel velocity to increase and the wheel slip to decrease.  When the wheel velocity increases, the electronic control unit reapplies the brake pressure and constrains the wheel slip to a certain degree. Based on the input from the sensor, the HCU controls the brake pressure in each wheel cylinder. Resultantly, the speed of wheel is controlled. This process is reiterated for the next braking operation.  




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