How Does the Factory-Installed Tire Pressure Monitoring System Work?
2 Answers
Factory-installed tire pressure monitoring systems operate in two ways: Direct tire pressure monitoring works by using pressure sensors installed in each tire to directly measure the air pressure. A wireless transmitter then sends the pressure data from inside the tire to a central receiver module, which displays the pressure readings for each tire. The system will automatically alert the driver if tire pressure is too low or if there is a leak. Indirect tire pressure monitoring works by detecting when a tire's pressure drops, causing the vehicle's weight to make that tire's rolling radius smaller, which in turn makes it rotate faster than the other wheels. By comparing the rotational speed differences between tires, the system can monitor tire pressure.
As a car enthusiast, I have always been interested in how the original tire pressure monitoring system (TPMS) works. It relies on direct sensors installed inside each tire valve. These battery-powered sensors continuously measure tire pressure and temperature data, then transmit the information via radio frequency signals to the vehicle's receiver module. The receiver processes this data, and if it detects that the tire pressure is below or above the set range, it triggers a warning light on the dashboard to alert the driver. This method offers strong real-time performance and high accuracy, but the sensor batteries typically last 5-10 years and need replacement to prevent system failure from affecting driving safety. Tire pressure monitoring is not only for safety but also improves fuel efficiency, as proper tire pressure reduces rolling resistance, making the car more fuel-efficient. It is recommended to perform a professional calibration annually to ensure the system works accurately.
