OUR GUIDE TO ABS SENSORS
Fundamentally, the anti-lock braking system (ABS) prevents skidding and loss of control under harsh braking. The Anti-lock braking system uses ABS Sensors (also known as wheel speed sensors) to sense conditions in the wheel which could result in a skid or loss of traction. But ABS sensors are also used by other vehicle systems aside from the ABS system including:
- Stability control
- Traction control
- Hill descent control
- Collision avoidance.
The rapid and accurate feedback from the ABS sensor is vital to an effective anti-lock braking and other safety systems.
The ABS sensor works in conjunction an ABS ring (sometimes referred to as a tone or pulse wheel) that is mounted to a component moving at the same rotation as the wheel. This is often the wheel hub but can also be the brake disc, CV joint or the drive shaft. The ABS sensor is mounted next to the ABS ring and communicates the rotational speed back to the ECU. The way in which rotation in measured depends on the type of sensor and ring in use. The most common sensors are either passive or active.