How Does a Tire Pressure Monitoring System Work?
1 Answers
Automotive tire pressure monitoring systems operate on the following principles: 1. Direct TPMS: Utilizes pressure sensors installed in each tire to directly measure tire pressure, then transmits the pressure data wirelessly from inside the tire to a central receiver module for display of individual tire pressure readings. 2. Indirect TPMS: When a tire's pressure decreases, the vehicle's weight causes that wheel's rolling radius to reduce, making it rotate faster than other wheels. By comparing rotational speed differences between tires, the system monitors pressure indirectly. Indirect TPMS essentially relies on calculating tire rolling radius to monitor pressure.