How Does a Tire Pressure Monitoring System Work?
1 Answers
Principle of direct tire pressure monitoring system: It uses pressure sensors installed in each tire to directly measure the tire pressure, and wireless transmitters to send the pressure information from inside the tire to a central receiver module, which then displays the pressure data for each tire. The system automatically alerts when the tire pressure is too low or there is a leak. Here is more information about tire pressure monitoring systems: 1. The working principle of indirect tire pressure monitoring is: When the pressure of a tire decreases, the weight of the vehicle causes the rolling radius of that wheel to become smaller, resulting in its rotational speed being faster than the other wheels. By comparing the differences in rotational speed between the tires, the system monitors the tire pressure. Indirect tire pressure warning systems actually rely on calculating the rolling radius of the tires to monitor pressure. 2. Both types of tire pressure monitoring systems have their pros and cons. Direct tire pressure monitoring systems can provide more advanced features, such as measuring the actual instantaneous pressure inside each tire at any time, making it easy to identify the faulty tire. Indirect systems are relatively cheaper to manufacture, and cars already equipped with 4-wheel ABS (each tire equipped with one wheel speed sensor) only require a software upgrade. However, indirect tire pressure monitoring systems are not as accurate as direct systems, cannot identify the faulty tire, and the system calibration is extremely complex. In some cases, the system may fail to work properly, such as when both tires on the same axle have low pressure.
