How does Geely Xingrui check which car has low tire pressure?

Tire pressure monitoring device is a simple tire pressure monitoring system, which uses the ready-made sensing function of ABS to count the tire revolutions, and the tire circumference with insufficient tire pressure becomes shorter. If one of the four tires has insufficient tire pressure, the number of revolutions when driving will be different from other tires.

If the tire pressure monitoring system is indirect, the position of the faulty tire cannot be seen. Through the direct tire pressure monitoring system, the tire pressure and temperature can be displayed on the in-vehicle display screen in real time, and the position of the faulty tire can be clearly displayed.

Indirect tire pressure monitoring uses ABS wheel speed sensors with four wheels to monitor tire pressure changes. The principle is that when the tire pressure decreases, the rolling radius of the wheel will decrease due to the weight of the vehicle, resulting in its rotating speed being faster than other wheels. By comparing the speed difference between tires, tire pressure can be monitored.

The indirect tire pressure alarm system actually monitors the tire pressure by calculating the tire rolling radius, so it is impossible to display the tire pressure value by indirect tire pressure monitoring. Only the alarm will prompt the tire pressure to be faulty, and the driver needs to get off and check which tire is faulty. Check each tire with a barometer to see which tire has low air pressure, and you can judge.

Direct tire pressure monitoring will display the tire pressure value. Direct tire pressure monitoring is to install a pressure sensor in each tire, and then send the tire pressure information to the central receiver through wireless transmission, and the driving computer displays the tire pressure value of each tire.