Is It Normal for the Four Wheels to Have Inconsistent Tire Pressure?
1 Answers
It is not necessarily normal for the four tires to have different pressures. While it's impossible for the tire pressures of all four wheels to remain exactly the same, the difference between the front and rear tires should not be too significant. Generally, a difference of around 0.1 bar is considered normal. Tire pressure monitoring involves real-time automatic monitoring of tire pressure while driving, alerting the driver to leaks or low pressure to ensure driving safety. There are three commonly used methods for tire pressure monitoring: Direct Tire Pressure Monitoring: This system uses pressure sensors installed in each tire to directly measure the tire pressure. The pressure data is transmitted wirelessly from inside the tire to a central receiver module, which then displays the pressure readings for each tire. The system automatically alerts the driver if the tire pressure is too low or if there is a leak. Indirect Tire Pressure Monitoring: When the pressure in a tire decreases, the vehicle's weight causes the rolling radius of that tire to become smaller, resulting in a faster rotation speed compared to the other wheels. By comparing the differences in rotation speeds between tires, the system monitors tire pressure. Indirect tire pressure monitoring systems essentially rely on calculating the rolling radius of the tires to monitor pressure. Introduction to Tire Pressure Monitoring System (TPMS): This system combines the advantages of both direct and indirect systems. It equips two diagonally opposite tires with direct sensors and includes a four-wheel indirect system. Compared to a full direct system, this hybrid approach reduces costs and overcomes the limitation of indirect systems, which cannot detect low pressure in multiple tires simultaneously. However, it still cannot provide real-time pressure data for all four tires as effectively as a full direct system.
