What does the tire pressure monitoring number mean?
1 Answers
The meaning of the tire pressure monitoring number is the air pressure value of the four tires. A tire pressure monitoring number around 2.5 BAR is considered normal. There are two types of tire pressure monitoring devices: Direct tire pressure monitoring: Direct tire pressure monitoring devices use pressure sensors installed in each tire to directly measure the tire pressure. The pressure information is transmitted from inside the tire to a central receiver module via a wireless transmitter, and then the tire pressure data for each tire is displayed. When the tire pressure is too low or there is a leak, the system will automatically alert. Indirect tire pressure monitoring: The working principle of indirect tire pressure monitoring is: when the pressure of a tire decreases, the weight of the vehicle will cause the rolling radius of that wheel to become smaller, resulting in its rotation speed being faster than the other wheels. By comparing the differences in rotation speeds between tires, the purpose of monitoring tire pressure is achieved. Indirect tire pressure warning systems actually rely on calculating the rolling radius of the tires to monitor pressure. Tire pressure standards are also related to the type of tire and the vehicle model. Different vehicle models have different weights, heights, and tire sizes, and thus require different tire pressures. Additionally, the pressure of a cold tire is different from that of a hot tire, with hot tires having about 20 kPa higher pressure than cold tires. The manufacturer's recommended value is the cold tire pressure, which is typically around 230 kPa to 250 kPa when the vehicle is cold, but the specific value should be based on the tire pressure marked for each vehicle. Furthermore, tire pressure is significantly affected by seasonal factors. In summer, high temperatures can cause tires to heat up during driving, and high pressure can easily lead to blowouts, so the pressure should be slightly lower. In winter, tire pressure is generally a bit higher than in summer due to thermal contraction and expansion, so a suitable tire pressure for cars in winter is usually between 250 kPa and 280 kPa. Hazards of overinflated tires: Reduced friction and adhesion of the tires, affecting braking performance; causing steering wheel vibration and deviation, reducing driving comfort; accelerating wear on the central tread pattern of the tire, shortening tire life; increasing vehicle vibration, indirectly affecting the lifespan of other components; causing excessive stretching and deformation of the tire cords, reducing tire elasticity, and increasing the load on the vehicle during driving. Hazards of underinflated tires: Increased friction coefficient with the road surface, leading to higher fuel consumption; causing heavy steering and deviation, which are factors detrimental to driving safety; increasing the movement of various parts of the tire, leading to abnormal heating due to excessive rolling; reducing the functionality of the cords and rubber, causing delamination or cord breakage and excessive friction with the rim, damaging the bead area and causing abnormal wear; exponentially increasing friction between the tire and the ground, rapidly raising tire temperature, softening the tire, and drastically reducing its strength. High-speed driving under these conditions may lead to blowouts.
