Function of safety devices and correct method of use


Function and effects

ABS is an abbreviation for Anti-lock Brake System, and this device maintains stability in the direction in which the vehicle is advancing and enhances the possibility of avoiding an obstacle through wheel operation by preventing the tires from locking (ceasing to rotate) when emergency braking is applied.

Correct method of applying emergency braking in a vehicle equipped with ABS

In order to effectively activate the ABS during emergency braking, the driver must be sure to continue depressing the brake pedal with as much force as possible. When the ABS actuates, the brake pedal may vibrate and a bumping noise may be heard, but this does not indicate a malfunction: the driver should continue to forcefully depress the brake pedal.

ABS Mechanism

Steps 2 to 5 illustrated here are repeated in rapid succession and the vehicle will come to a stop while preventing the wheels from locking. This mechanism maintains the stability of the vehicle in its original direction of travel and retains steerability with the appropriate level of braking force.

1.Is the stopping distance reduced when a vehicle is equipped with ABS?

Normally, there is no great difference, but it is reduced is some cases, for example when braking on wet road surfaces that have become slippery. However, there are also cases where the stopping distance may increase, as in new snow, on gravel roads, or when tire chains have been mounted on the vehicle.

2.When does the ABS actuate?

It actuates when the wheels are about to lock during braking, for example, during emergency braking or whenbraking on a slippery road surface.