Anti-Lock Braking System (ABS)

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A system that prevents the wheels from locking while braking hard…

What

A system that prevents the wheels from locking while braking hard, or on slippery surfaces, to retain steering control. This allows the driver to steer away from a potential accident which may otherwise occur with locked wheels and the vehicle out of control.

Why

When the brake pedal is depressed, the wheels can lock before the vehicle comes to a stop (skid). In such an event, the manoeuvrability of the vehicle is reduced or totally lost if the front wheels are locked (The vehicle will travel in the direction its mass weight takes it irrespective of the position of the steering wheel). Likewise the directional stability of the vehicle is compromised if the rear wheels are locked (The unrestrained mass weight of the rear of the vehicle will try to cause rotational movement, i.e.- a spin).

Where

Honda ABS is a fully integrated part of the braking system and can not be added on. It is situated between the brake master cylinder and wheel brakes and is passive under normal braking.

How

Each wheel hub has multi segment rotor, or disc, which turns at the same speed as the road wheel. Each rotor has a stationary pickup sensor which converts wheel speed into electrical impulses. The impulses from each wheel are fed into a central computer. The central computer compares the wheel speeds against each other, and the de-acceleration rate.

The main braking system is equipped with a "Modulator." The modulator can control the amount of braking force applied to each wheel brake when called upon by the ABS central computer. Under normal braking the ABS has no influence on the brakes, and in no circumstances can it operate below 10kmh.

The computer tells the modulator to adjust the braking force to that wheel, so that it will not lock

Under braking, where one or more wheel slows down faster than the others, about to lock, this is detected by the central computer. The computer tells the modulator to adjust the braking force to that wheel, so that it will not lock. This communication between wheel - central computer - modulator occurs many times a second. On each occasion an adjustment can occur until the "offending" wheel assumes the same braking speed as the other wheels, ensuring optimal braking performance. As these adjustments are carried out "kickback" or "pulsing" will be felt at the brake pedal.