Conspiracy or Physics: Why Autometers Always Lie
- February 22, 2023
- 0
There are many stories on the net about how, after pumping the wheel with a car compressor to standard pressure, it actually turns out to be substandard. This
There are many stories on the net about how, after pumping the wheel with a car compressor to standard pressure, it actually turns out to be substandard. This is determined in several ways. About why this is happening, the portal “AvtoVzglyad” says.
It seems that the wheel is correctly inflated, but the car still drifts to the side. Drivers are perplexed: a running compressor indicates a nominal two bar, and as soon as the electric motor seizes up, the arrow shifts to 1.8 bar or lower. A number of publications even performed their tests, with the so-called reference manometer confirming the inconsistency. Where do the same 0.2 bar disappear, or even more?
They are lost when passing through channels in the coil. This is a very narrow spot, which creates back pressure. Therefore, when the engine is turned off, the “shortage” is obtained here. This is how the error of the pressure gauge installed on the compressor is estimated. She has her own for everyone.
But that’s not all. It is also important how much the valve stem moves when the compressor hose nozzle presses on it. That is, you need to apply or wind this same nozzle very carefully and tightly so that the tip presses accurately on the coil. Otherwise, it will not open fully, the resistance will be great, which will lead to under-inflation.
Hence another nuance. When choosing a pump, pay attention to such an important element as the tip. The largest air passage gives the so-called “tap”. Narrow gap nozzles are less effective.
From all the above we conclude: a running compressor always shows more than what actually enters the tire. Therefore, it is impossible to set the pressure absolutely accurately using the pressure gauge, because the valve is an obstacle in the way of the air flow. That is, feel free to pump the wheels. If you need two bars, pump to 2.1-2.2 bar. And just to be on the safe side, also buy an electronic pressure gauge. These have a higher accuracy.
Why is pressure so sensitive? Yes, because the valves are also different and provide a different back pressure. This results in uneven tires, leading to excessive fuel consumption. And if you don’t follow this at all, the car will regularly drive “half smooth”. Hence not only the increased “zhor” of fuel, but also the threat of wheel disassembly during sharp maneuvers.
Photo: Drive2.ru (AlekseyBychkov)
It seems that the wheel is correctly inflated, but the car still drifts to the side. Drivers are perplexed: a running compressor indicates a nominal two bar, and as soon as the electric motor seizes up, the arrow shifts to 1.8 bar or lower. A number of publications even performed their tests, with the so-called reference manometer confirming the inconsistency. Where do the same 0.2 bar disappear, or even more?
They are lost when passing through channels in the coil. This is a very narrow spot, which creates back pressure. Therefore, when the engine is turned off, the “shortage” is obtained here. This is how the error of the pressure gauge installed on the compressor is estimated. She has her own for everyone.
But that’s not all. It is also important how much the valve stem moves when the compressor hose nozzle presses on it. That is, you need to apply or wind this same nozzle very carefully and tightly so that the tip presses accurately on the coil. Otherwise, it will not open fully, the resistance will be great, which will lead to under-inflation.
Hence another nuance. When choosing a pump, pay attention to such an important element as the tip. The largest air passage gives the so-called “tap”. Narrow gap nozzles are less effective.
From all the above we conclude: a running compressor always shows more than what actually enters the tire. Therefore, it is impossible to set the pressure absolutely accurately using the pressure gauge, because the valve is an obstacle in the way of the air flow. That is, feel free to pump the wheels. If you need two bars, pump to 2.1-2.2 bar. And just to be on the safe side, also buy an electronic pressure gauge. These have a higher accuracy.
Why is pressure so sensitive? Yes, because the valves are also different and provide a different back pressure. This results in uneven tires, leading to excessive fuel consumption. And if you don’t follow this at all, the car will regularly drive “half smooth”. Hence not only the increased “zhor” of fuel, but also the threat of wheel disassembly during sharp maneuvers.
Source: Avto Vzglyad
Donald Salinas is an experienced automobile journalist and writer for Div Bracket. He brings his readers the latest news and developments from the world of automobiles, offering a unique and knowledgeable perspective on the latest trends and innovations in the automotive industry.
