How does the passenger car tire pressure monitoring system monitor tire pressure in real time?
Publish Time: 2025-02-20
The passenger car tire pressure monitoring system (TPMS) is an advanced technology device designed to monitor tire pressure in real time to ensure driving safety. Through an accurate and efficient monitoring mechanism, the system can detect abnormal changes in tire pressure in a timely manner, provide timely warnings to the driver, and avoid driving risks caused by improper tire pressure.TPMS is mainly divided into two types: direct and indirect. Direct TPMS measures the air pressure data inside the tire in real time by installing pressure sensors on each tire. These sensors are usually connected to the tire valve and can accurately capture small changes in tire pressure. Once the tire pressure is lower or higher than the preset safety range, the sensor will immediately send an alarm message to the receiver in the car through a wireless signal. After receiving the signal, the receiver will remind the driver to pay attention to the tire pressure status through the warning light or display on the dashboard.Indirect TPMS does not rely on the pressure sensor inside the tire, but uses the vehicle's ABS (anti-lock braking system) wheel speed sensor to monitor the tire rotation speed. When the tire pressure changes, the rolling radius of the tire will also change, which will affect the rotation speed of the tire. Indirect TPMS indirectly calculates the abnormal tire pressure by comparing the rotation speed differences of each tire. Although the cost of indirect TPMS is relatively low, its accuracy is not as good as direct TPMS, and it may produce false alarms in certain specific situations (such as tire size change, slippery road, etc.).With the continuous advancement of technology, modern passenger car tire pressure monitoring systems have become more and more intelligent. Some high-end models are even equipped with intelligent TPMS, which combines the advantages of direct and indirect types. By installing more sensors and using more advanced algorithms, it can more accurately monitor tire pressure and temperature and provide more comprehensive tire status information.The real-time monitoring mechanism of the passenger car tire pressure monitoring system provides a strong guarantee for driving safety. Through precise measurement and timely alarm, the system can help drivers detect abnormal changes in tire pressure in time and avoid traffic accidents caused by improper tire pressure. At the same time, maintaining proper tire pressure can also extend the service life of tires, improve fuel economy, and reduce vehicle operating costs. Therefore, the passenger car tire pressure monitoring system has become an indispensable and important safety configuration for modern cars.
