Pyöränopeusanturit

Pyöränopeusanturit, often referred to as wheel speed sensors, are essential components in modern vehicles. Their primary function is to measure the rotational speed of each wheel and transmit this data to the vehicle's control units. This information is critical for various safety and performance systems.

The most common type of wheel speed sensor is the Hall effect sensor. These sensors work by detecting changes in a magnetic field. As the wheel rotates, a toothed ring attached to it passes by a magnetic sensor. The teeth interrupt the magnetic field, generating a digital signal that indicates the wheel's speed. Another type is the magnetoresistive sensor, which operates on a similar principle but is more sensitive to magnetic field variations. Older systems might use inductive sensors, which generate a voltage proportional to the speed of a rotating toothed wheel.

The data from pyöränopeusanturit is vital for the anti-lock braking system (ABS). ABS uses this information to prevent wheel lock-up during braking, allowing the driver to maintain steering control. Similarly, the electronic stability control (ESC) system relies on wheel speed data to detect and correct skidding or loss of traction. Traction control systems also utilize this input to prevent wheelspin during acceleration. Furthermore, modern automatic transmissions and some advanced driver-assistance systems (ADAS) like adaptive cruise control use wheel speed information for their operations. A malfunctioning wheel speed sensor can lead to illuminated warning lights on the dashboard and compromise the effectiveness of these critical safety systems.