TPMS REGULATION

What is TPMS?

TPMS, short for Tire Pressure Monitoring System, monitors the tire pressure levels of a vehicle and promptly alerts drivers to significant deviations or imbalances. These systems are crucial for maintaining optimal tire conditions, effectively preventing blowouts, which can lead to dangerous on-road accidents.

How does TPMS Work?

At its core, TPMS functions through small electronic sensors installed on each wheel of the vehicle. These sensors continuously monitor tyre pressure and transmit the data, alerting the driver via a dashboard warning if the pressure falls below a specified threshold. It’s important to note that there are two main types of TPMS: direct and indirect.

How does direct TPMS Work?

Direct TPMS uses air pressure sensors mounted on the valve of each wheel to actively monitor tyre pressure. These sensors typically provide real-time readings of both tyre pressure and temperature. The system then wirelessly transmits this data to the vehicle, triggering a dashboard alert if any significant pressure changes occur.

Advantages and Disadvantages of Direct TPMS

Direct TPMS offers highly accurate tyre pressure readings, removing the need for recalibration after tyre inflation or rotation. Its sensors also have long-lasting batteries, enhancing reliability. However, these sensors are more vulnerable to damage during tyre changes, and the system is generally more expensive compared to indirect TPMS.

How does Indirect TPMS Work?

Indirect TPMS does not use air pressure sensors inside the tyres. Instead, it relies on ABS wheel speed sensors to detect pressure loss. The system monitors the relative speeds of the wheels, comparing them to generate pressure readings. An under-inflated tyre rotates faster than normal, prompting the system to trigger a dashboard alert.

Advantages and Disadvantages of Indirect TPMS

Indirect TPMS offers a more cost-effective alternative to direct systems and requires less frequent calibration. However, it must be reset after tyre maintenance and doesn’t provide exact pressure readings. Additionally, minor differences in tyre sizes can result in inaccurate measurements.