What is the normal tire pressure? What is the difference between summer and winter?

According to the provisions and requirements of international standard GBT2978-2008:

Standard tire: 2.4-2.5 bar;

Reinforced tire: 2.8-2.9 bar;

Maximum atmospheric pressure: not more than 3.5 bar.

2. Automobile tire pressure in summer: according to the lower limit of standard tire pressure. In summer, when the car is parked in the open air, the air pressure can generally be about 0. 1bar lower than the standard to avoid high temperature puncture.

3. Winter tire pressure: Based on the standard tire pressure, the tire pressure should be raised by about 0.2bar.

Extended data:

Methods for detecting tire pressure:

1. Direct tire pressure monitoring: The networked tire pressure monitoring device directly measures the tire pressure by using the pressure sensor installed in each tire, sends the pressure information inside the tire to the central receiving module by using the wireless transmitter, and then displays the tire pressure data. When the tire pressure is too low or leaks, the system will automatically give an alarm.

2. Indirect tire pressure monitoring: The working principle of indirect tire pressure monitoring is that when the air pressure of a tire 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 warning system actually monitors the air pressure by calculating the tire rolling radius.

3. Introduction of Tire Intelligent Monitoring System (TPMS): It has the advantages of the above two systems. It is equipped with two direct sensors in diagonal tires and a four-wheel indirect system.

Compared with the direct system, this composite system can reduce the cost and overcome the shortcoming that the indirect system can not detect the low air pressure of multiple tires at the same time. However, it still can't provide real-time data of actual pressure in all four tires like the direct system.

References:

Baidu encyclopedia-tire pressure