الموضوع: سؤال عن ضبط ضغط الهواء داخل اطارت الانوس

PV=nRTfor a tyre, closed volume, V, n and R are constantso, P =constant * Tmeaning, as temperature increases, pressure will increase, but due to the presence of R, different gases will not exhibit pressure increase of same amount responding to the same increase in temperatre i can provide U with charts for the deviation factor but for simplicity U can safely assume it to be 1 as the variation in temperature variations are not too great in passengers car tyres. so, pressure will increase as temperature increases.
the molecules size is not the only factor for leaks. Leakage can occur through the tyre's inner liner but can also occur through the valve, punctures, or failure of the seal between tyre and wheel rim. Pure nitrogen might leak more slowly through the liner, but regular checks of tyre condition and pressures will still be essential.

Corrosion of the tyre through use of normal compressed air alone is most unlikely because only the outer tread band of a car tyre contains steel – the amount of moisture reaching it from the inside is minimal.

great temperature variations only happens in aircrafts tyres landing and in F1 race cars, but not in normal passengers tyres.

it is a harmless hoax that was leashed to make ppl check up on their tyres on a regular basis. and I will quote from the same links that proves that they are not fully supporting using nitrogen ...


"''Nevertheless, the existence of several other possible sources of leaks (tire/rim interface, valve, valve/rim interface and the wheel) prevents the guarantee of better pressure maintenance for individuals using nitrogen inflation."
So we can save the expense if we just check our tires regularly.
The trouble is, we don't.
As recently as two years ago, government and tire industry surveys showed close to 30 percent of cars, vans, pickups and SUVs on the road had at least one tire that was substantially underinflated, at least 8 psi below the recommended minimum pressure.
But high gas prices and consumer education may be cutting into that number. According to a survey by Uniroyal Tire in mid August, nearly 50 percent of Americans said they are now checking the air pressure in their tires once a month.
Still, that leaves millions of unchecked tires."""

"""

There's significant debate about the value of filling your tires with Nitrogen. On Eng-Tips Forums, a web board for engineering professionals, the "Nitrogen filled tires?" thread is full of passionate discussion, most of it quite skeptical about the practical benefits of the practice. The consensus opinion on Eng-Tips Forums seems to be that the benefits of Nitrogen are largely academic -- tires are engineered to be filled with ambient air, wheels are designed to cope with the moisture that air carries, and the benefits of Nitrogen, in real world applications, though real, are not worth the cost. My bottom line advice: Save your money, and keep your tires properly inflated with air. You'll get much better results investing in a small compressor for your garage and keeping your SUV tires properly inflated with air."""

the hoax is that filling passengers cars tyres with nitrogen is much benifitial that filling with air. i replace hoax word with debate for more convenience

the reason is for F1 is the very high temp that tyres are exposed to due to the tremendous speed and the no. of laps they do in 1 race, they change the tyres many times during 1 race but of course they'd like to reduce howmany times they change tyres to gain more time, as for aircrafts there was an incident i think in mexican airport that a plane tyre was not filled with nitrogen and during landing it blew off and caught fire, they claim that the rubber burned due to the amount of oxygen inside the tyres, I didnt look up this thing but we already have about 21% of air arround the tyres from the outside is oxygen and thats more than enough to complete the fire triangle and start a fire, so i'd say i can not give a conclusion since i did not look up this issue thoroughly. but i'd say insurance companies would come up with anything as a justification in order to settle out the moeny issues, it happens all the time in my line of work. and dont take aeverything u find in wikipedia for granted, they are too academic. in order to inflate tyres u ofcourse use a compressor, and this compressor got a storage tank, and air is first compressed in that tank, and any moisture contained in air will first condensate in that tank, thats why all those tanks got a drainage valve and thats why its being drained every now and then, ask any1 works in tyres business. in my personall opionion and based on my studies at line of work and from internet finding i'd say
inflating u r car tyres with nitrogen is not as beneficial as its being claimed, its something like fashion and every body runs after it, but it wont hurt to do it