How much pressure does it take to pump up the car?

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: no more than 3.5 bar

Extended data:

Other factors to refer to:

(1) Seasonal factors:

A. Winter: On the basis of the standard air pressure of automobile tires, it is appropriately raised by about 0.2bar.

B. Summer: according to the lower limit of standard air pressure of automobile tires.

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.

(2) Loading load:

A. No-load/half-load: according to the lower limit of automobile tire pressure standard (the tire pressure on the vehicle label sticker can be used as the minimum tire pressure reference value).

B full load: the upper limit of full load according to the automobile tire pressure standard (the maximum tire pressure value on the tire label can be used as a reference for the theoretical maximum tire pressure).

(3) Tire pressure measurement environment:

A. Hot tires: The tire pressures of cold tires and hot tires are different, so pay attention when measuring. The difference is about 0.3 bar.

B. cold tires: at least three hours after parking or the tires are not more than 2 kilometers. If the tire pressure can only be measured when the tire is hot, please subtract about 0.2bar from the measured tire pressure to obtain the tire cooling inflation pressure.

(4) Driving conditions:

A. For the bumpy road surface, reduce the tire pressure by 0. 1-0.2bar according to the automobile standard tire pressure.

B.the jump range is very small, so you can ignore it. Don't worry.

C. When running long-distance and high-speed, the tire pressure should not be too low, and it should be raised by about 0.2bar according to the lower limit of standard tire pressure.

(5) Tire condition:

A. New tires: The tire pressure can be raised by about 0.2bar according to the standard tire pressure of automobiles.

B used tires: properly reduce the tire pressure according to the automobile tire pressure standard, and severely worn tires shall be subject to the lower limit of the automobile tire pressure standard.

C. Soft tires: tires with comfortable patterns should be raised by about 0.2bar according to the standard tire pressure.

E. hard tire: that is, the tread tire is treated according to the lower limit of standard tire pressure.

F brand difference of tires: the tire pressure standard of automobiles is usually original tires. If you change tires, you need to know the performance differences between brands (Michelin, Deng Lupu, Mapai, Maxi, Bridgestone, Han Tai, Tong Jia, Chaoyang, etc.). ). For example, Hantai is slightly lower than Michelin or Kyle Polo by about 0. 1Bar. Look for the word MAX PRESS on the sidewall, and the number behind it is: MAX PRESS 340kPa(50PSI), which means that the maximum safe inflation pressure of this tire is 3.4bar under normal conditions.

(6) Tire pressure of spare tire:

Because the spare tire is not commonly used, it is better to have a higher air pressure to avoid losing the emergency function when using it. Generally should be higher than 2.5. Adjust the appropriate tire pressure when using, and inflate it to a high tire pressure after using. 2.5 to 3.0 bar.

References:

Baidu encyclopedia-tire pressure