Is it really that good to inflate tires with nitrogen? What does nitrogen do?

Flat tires are the number one killer in road accidents, especially in the summer. According to statistics, highway 46 traffic accidents are caused by tire failure, of which tire bursts account for 70% of the total number of tire accidents. As the saying goes:

Air pressure is the life of tires, high temperature is the main killer of tires", puncture is mainly due to the tire pressure is too low or too high, the high temperature generated in high-speed driving leads to tire rubber aging, fatigue strength decreases, tread wear is violent, etc. Therefore, keeping the tire pressure normal and stable is the key to preventing punctures and ensuring safe driving. <>

Therefore, many car owners also hope to reduce the risk of punctures by replacing ordinary gas with nitrogen, so how effective is nitrogen? <>

The purpose of nitrogen filling in tires is to make the partial pressure inside the tire equal to the outside (the partial pressure balance between the inside and outside of the tire), so that a small amount of oxygen is trapped in the tire and will not penetrate the tire wall and cause insufficient tire pressure. The purpose of nitrogen filling in tires has nothing to do with the purity of nitrogen, but in the range of making the residual oxygen in the tire reach 2 5%, so that a small amount of oxygen in the tire can produce an equal partial pressure to the outside. Our tires are generally filled with compressed air, which consists of 78 nitrogen, 21 oxygen, and 1 other gas, and in the worst case, moisture will take up 5 percent of the total volume.

Therefore, nitrogen filling mainly plays two roles: one is to remove water; <>

Second, replacing the relatively small oxygen molecules with larger nitrogen molecules slows down the penetration of gas into the tire wall, which means that, in theory, nitrogen filling can keep your tires at standard tire pressure for longer, thereby avoiding abnormal tire wear and tear and reducing rolling resistance and fuel consumption. There are certain benefits to inflating tires with nitrogen. However, regardless of whether air or nitrogen is used for inflation, the tires must be regularly maintained and the standard air pressure of the tires must be maintained.

The use of nitrogen inflation is not a substitute for the maintenance of daily tire inflation pressure.

The advantage of filling tires with nitrogen is that it can reduce the speed of tire heat accumulation and keep the tire pressure stable, thereby reducing the probability of puncture and improving driving safety; Moreover, because the tire pressure is stable and the audio conductivity of nitrogen is low, it can improve driving stability and silent comfort; It can also delay the aging of rubber and prolong the service life of tires; In addition, it can also be rocked to reduce fuel consumption.

Nitrogen filling tires has advantages and disadvantages, among which the most serious consequence of nitrogen filling is that it may damage the tires, because nitrogen filling needs to be vacuumed, and the tires will be deformed, and the inside of the tires is composed of steel wire curtains, so nitrogen filling may deform the tire wires and damage the tires. In addition, the nitrogen filled into the tire is not 100% pure, because there will be a small amount of air left in the tire, so the nitrogen purity of the tire can only reach 95 - 98%.

Reduce the probability of punctures and improve safety

The main reason for a tire puncture is the rapid rise in temperature in the carcass, which causes the tire pressure to increase suddenly; And the high temperature will also accelerate the aging of tire rubber, which will reduce the strength of the tire and cause a puncture.

Compared with general high-pressure air tires, high-purity nitrogen is oxygen-free and almost water-free, oil-free, and its thermal expansion coefficient and thermal conductivity are low, so the temperature rises slowly, which reduces the speed of tire heat accumulation, and also has the characteristics of non-flammable and non-combustion. Therefore, filling the tires with nitrogen can greatly reduce the probability of punctures and improve driving safety.

Improves driving stability and quiet comfort

Nitrogen itself is an inert diatomic gas, and its thermal conductivity is lower than that of air, so it will not be affected too much when heated, and its penetration rate into the tire wall is about 30 to 40% slower than that of air. Even when driving at high speeds, the tires have good tire pressure stability, which improves the comfort and stability of the car to a certain extent.

Secondly, the audio conductivity of nitrogen is relatively low, about 1 5 of ordinary air, so the use of nitrogen can effectively reduce the noise of tires and improve the quietness of driving.

Extend the life of your tires

A large reason for the aging of tire rubber is that the oxygen in the air reacts chemically with the rubber lead rubber and the steel rim, resulting in tire cracking. If the tire is filled with nitrogen, because the molecular activity of this gas is relatively small, it can not only greatly reduce the possibility of irregular friction of the tire, but also is less prone to oxidation reaction than air, which can delay the aging of tire rubber and prolong the service life of the tire.

Reduce car fuel consumption

If the tire pressure is insufficient, the driving resistance will increase, which will lead to an increase in the fuel consumption of the car. The use of nitrogen tires can well maintain the stability of tire pressure and avoid the phenomenon of increased fuel consumption caused by unstable tire pressure. Moreover, nitrogen has the characteristics of low thermal conductivity, which can effectively reduce the temperature rise of tires during high-speed operation, thereby reducing the rolling resistance of tires and further reducing the fuel consumption of automobiles.

The tires can be filled with nitrogen, which can theoretically improve the stability of the vehicle in the limit state; However, for our general family cars, the actual improvement effect is still relatively limited when driving in the existing road environment. Data: Nitrogen accounts for about 78%, oxygen accounts for about 21%, rare gases account for about about it, carbon dioxide accounts for about it, and other gases and impurities account for about it, such as ozone, nitric oxide, nitrogen dioxide, water vapor, etc.

I know it's good to be filled with nitrogen, but who can tell the results of the experiment? How much better? At least there is a saying, how safe and comfortable is it to use nitrogen than air?

You want people to pay for it, do you have a good reason to convince them? 1. Nitrogen-filled tires can be directly supplemented with air. 2. The tire is filled with nitrogen, because nitrogen is inert, and the air pressure change range of thermal expansion and cold contraction is very small, and the tire pressure is more stable than that of air filling.

But filling nitrogen on ordinary car tires has little effect. Because the nitrogen content of ordinary air has exceeded 70%, pure nitrogen is only 30% on the basis of this 70%, which is better than nothing for ordinary car tires. 3. Nitrogen-filled tires are generally used in aircraft tires and other components with harsh use environment and strict requirements.

Because the impact strength, friction and heat of aircraft tires are far higher than those of ordinary automobile tires, it requires higher requirements of inflatable gas. 4. In fact, under normal circumstances, ordinary car tires can use air, and there is no need to fill nitrogen. Of course, if you often run at high speeds, and it is not too much trouble, then you can also fill it with nitrogen.

Regarding the landlord's concern about "Is it good to fill car tires with nitrogen?" "Here's my personal opinion:

Very good, filling car tires with nitrogen has the following benefits:

1. Nitrogen is dry and clean, waterless and oil-free. Nitrogen is an inert gas that will not oxidize tires and will not corrode the rim, prolonging the service life of tires;

2. The permeability of nitrogen in tires is low, which can keep the tire pressure stable for a long time, reduce the probability of tire leakage, and improve the safety of vehicle driving;

3. Nitrogen keeps the tire pressure stable, reduces vehicle resistance, reduces fuel consumption, and reduces tire wear;

4. When driving on uneven and convex roads, it can reduce vibration, drive smoothly, have low volume conductivity and reduce noise.

Nitrogen filling in automobile tires has many benefits such as reducing the probability of puncture, improving driving stability, extending tire life, and reducing automobile fuel consumption.

Nitrogen-filled car tires have many benefits, because after nitrogen filling, it can reduce the heat accumulation rate of tires, keep the temperature of car tires normal, and keep the tire pressure stable, so as to reduce the probability of puncture. Because nitrogen is oxygen-free, it contains almost no water and no oil, and its thermal expansion coefficient and thermal conductivity are particularly low, so the tire heats up relatively slowly. Nitrogen is also non-flammable and does not support combustion, which ensures the safety of soft tires and prevents punctures.

1. Improve driving stability

Automobile tires filled with nitrogen can improve the stability of driving, because nitrogen itself is an inert diatomic gas, its thermal conductivity is relatively poor, and there will not be too many changes when it is heated by the nuclear state, and it penetrates into the tire sidewall at a speed of about 40% slower than air, so after the tire is filled with nitrogen, the tire can also maintain good tire pressure at high speed, which can improve the stability of driving and the comfort of riding to a certain extent. The audio conductivity of nitrogen is relatively low, only about 20% of ordinary air, so filling car tires with nitrogen can also reduce the noise of tires.

2. Extend the service life of tires

Nitrogen filling in automobile tires can also prolong the service life of tires, because the reason for the damage and aging of automobile tires is that there is a chemical reaction between oxygen in the air and rubber and steel rings, so that the tires have cracks, if the automobile tires are filled with nitrogen, the molecular activity of this gas source is relatively small, which can reduce the possibility of irregular friction of tires and also reduce the occurrence of oxidation reactions, which can slow down the aging rate of automobile tire rubber and prolong its service life.

3. Reduce the fuel consumption of automobiles

In the process of driving, if the tire pressure of the tire is insufficient, the driving resistance will increase, then the fuel consumption of the car will rise, if the car tire is filled with nitrogen, the tire pressure can be maintained steadily, and the tire can also have good stability, so that the fuel consumption can be avoided, in addition, the thermal conductivity of the tire filled with nitrogen will be reduced, and the rolling resistance of the tire will be reduced, which is also an important reason why the nitrogen filling of the automobile tire can reduce fuel consumption.

<> "Why is it better to fill car tires with nitrogen?".

Nitrogen is an inactive gas, and the volume expansion of dry nitrogen is much lower than that of air containing moisture when the temperature changes, so when the tire rises at high speed, the tire pressure rises less, reducing the probability of puncture. In addition, because nitrogen does not contain moisture, it protects the inside of the rim from oxidation, thus extending the life of the tire.

1. Save fuel.

The lack of tire pressure and the increase in rolling resistance after heat will cause the fuel consumption of the car to increase. Nitrogen can maintain stable tire pressure and delay the decrease in tire pressure; It is dry, oil-free, water-free, has low thermal conductivity and slow heating, which reduces the temperature rise of tires when driving; Nitrogen-filled tires have less deformation and improved grip, which reduces their rolling resistance, thereby reducing fuel consumption.

In the United States, the relevant parties have done a comparative test of tire nitrogen filling and air filling, and the statistical results after the experiment show that the nitrogen filled tire can drive 26 miles more than the air filled tire. The tires are filled with nitrogen according to the designed tire pressure, which can achieve the fuel consumption index of the car design. Tests have shown that nitrogen-filled tires are more fuel-efficient than air-filled tires 2 10.

2. Improve the stability and comfort of tire driving.

The chemical properties of nitrogen are extremely inactive, the gas molecules are larger than the oxygen molecules, not easy to expand and contract, the deformation amplitude is small, and the speed of its penetration of the tire wall is 30 40 slower than the air, which can maintain stable tire pressure, improve the stability of tire driving, and ensure driving comfort; The audio conductivity of nitrogen is low, equivalent to 1 5 of ordinary air, and the use of nitrogen can effectively reduce the noise of tires.

3. Prevent puncture and lack of air.

When the car is driving, the tire temperature will increase due to friction with the ground, especially when driving at high speed and emergency braking, the gas temperature in the tire will rise rapidly, and the tire pressure will increase suddenly, so there will be a possibility of a puncture. The high temperature leads to the aging of tire rubber, the fatigue strength decreases, and the tread wear is intense, which is also an important factor that may lead to a puncture.

Compared with general high-pressure air, high-purity nitrogen is oxygen-free and almost free of water and oil, with low thermal expansion coefficient, low thermal conductivity, and slow heating, which reduces the rate of tire heat accumulation, and has the characteristics of non-flammable and non-combustion, which can greatly reduce the probability of puncture.

4. Extend the service life of tires.

After the use of nitrogen, the tire pressure is stable and the volume changes small, which greatly reduces the possibility of irregular tire friction, such as crown grinding, shoulder grinding, and eccentric grinding, which improves the service life of the tire; The aging of rubber is caused by the oxidation of oxygen molecules in the air, and its strength and elasticity decrease after aging, and there will be cracking, which is one of the reasons for the shortening of the service life of tires.

The nitrogen separation device can greatly remove oxygen, sulfur, oil, water and other impurities in the air, effectively reduce the oxidation degree of the tire lining and the phenomenon of rubber corrosion, will not corrode the metal wheel Li Qi rim, prolong the service life of the tire, and greatly reduce the rust of the wheel rim.

As follows:

1. The benefits of nitrogen filling in automobile tires: improve the stability and comfort of tire driving, prevent puncture and lack of air, prolong the service life of tires, reduce fuel consumption, and protect the environment.

2. The disadvantages of nitrogen filling in automobile tires: tires need to be vacuumed before filling nitrogen, but usually 100% vacuum can not be pumped, and vacuum will deform tires, and it will also cause steel wire deformation, and the cost of tire nitrogen filling is higher.

Introduce. Nitrogen is an inert gas, with low permeability in the tire, which can keep the tire pressure stable, reduce the probability of puncture, prolong the life of the tire, and reduce the vibration of the tire on the uneven road surface, so that the vehicle can drive smoothly.

It also has a low volume conductivity function, which greatly reduces the noise generated when the tire rubs against the ground, etc. Especially in hot climates, nitrogen tires can show their advantages on the highway.