How does the passenger car tire pressure monitoring system work?
Publish Time: 2025-01-14
The passenger car tire pressure monitoring system (TPMS) is a technology designed to improve driving safety. The system monitors the inflation pressure of the tire in real time and alerts the driver when the pressure is abnormal, thus effectively avoiding safety hazards caused by insufficient or excessive tire pressure. Let's explore the working principle of the passenger car tire pressure monitoring system.The passenger car tire pressure monitoring system is mainly divided into two types: indirect and direct. Indirect TPMS uses the vehicle's ABS (anti-lock braking system) wheel speed sensor to indirectly compare the speed difference between the tires to infer the change in tire pressure. When the pressure of a tire decreases, its diameter will decrease accordingly, causing the tire to rotate faster. By detecting this speed difference, the system can indirectly determine whether the tire pressure is abnormal. However, although this method is low-cost, its accuracy and reliability are relatively limited.In contrast, the working principle of direct TPMS is more direct and accurate. A pressure sensor is installed on each tire to directly measure the pressure inside the tire. These sensors send the pressure information inside the tire to a central receiver via a wireless transmitter, which is then displayed on the vehicle's display. When the tire pressure is lower than or higher than the preset safety range, the system will automatically alarm and remind the driver to deal with it in time. Direct TPMS is not only more accurate, but also can monitor the specific pressure value of each tire in real time, providing drivers with more detailed and accurate information.In addition to the basic pressure monitoring function, some high-end passenger car tire pressure monitoring systems also have other additional functions. For example, some systems can monitor the inflation temperature of the tire, as well as the battery status and remaining operating time of the wheel electronic system. This information helps drivers to have a more comprehensive understanding of the real-time status of the tire, so as to make more reasonable driving decisions.In order to ensure the normal operation of the passenger car tire pressure monitoring system, the driver needs to regularly check and calibrate the system. After replacing the tire or sensor, the system also needs to be recalibrated to ensure its accuracy. In addition, since the exhaustion of the sensor battery is one of the common faults, the driver also needs to pay attention to the regular replacement of the battery or the entire sensor to keep the system running reliably.In summary, the working principle of the passenger car tire pressure monitoring system is based on pressure sensors and wireless communication technology. By monitoring the tire pressure in real time and reminding the driver to deal with abnormal situations, the system provides a strong guarantee for driving safety.
