After running at high speed, I feel that the power of the car has become stronger. This is really not a psychological effect, mainly because the three parts of the car have really changed in the process of running at high speed, thus making the car more energetic.
ECU has fuel correction function, which makes fuel supply more active.
1 Location is the ECU of the driving computer. After running high speed, the running logic of ECU of the driving computer will change, which makes us feel that the power of the car is better. Nowadays, cars basically use electronic throttle. What we step on in the car is actually a switch, which will be converted into digital signals and transmitted to the driving computer.
Li Changwen of Beijing Institute of Technology and others published a paper in Automotive Engineering, which is about integrated control of vehicle power transmission based on engine control system.
Among them, the ECU of the driving computer has a certain adaptive ability, which will change the logic of air intake, combustion and gear shifting according to the user's driving habits. When ECU senses different road and vehicle conditions, ECU's fuel correction will intervene to correct the pulse width of fuel injection.
When running at high speed, the ECU itself will be more active in supplying oil. When you get off the expressway and go downtown, the ECU has no eyes, and its style has not changed. Can't you see it? So it will make the car more dynamic and have better power.
Just like running, we finished running, not that the heart rate suddenly became normal and the sweat stopped immediately. There will be an adjustment process. After a while, the heart rate will drop and everyone will walk faster than usual.
When the tire temperature rises, the tire pressure increases and the rolling resistance decreases.
The second part is the tire. After running at a high speed, the state of the tires will also change. Listen to Yin Haishan's doctoral thesis of Qingdao University of Science and Technology, theoretical and experimental research on tire wear and its temperature field.
The tire temperature during driving is measured, and it is found that the tire temperature at 120km/h is 30~40℃ higher than that at 20km/h, and the tire pressure will increase, thus reducing the tire rolling resistance. There is also information: when the tire pressure increases from 2.4bar to 2.6bar, the rolling resistance will decrease by 4.4%~7.7%.
Tire rolling resistance is small, and the car will feel better when driving. Just like a tire walking on the asphalt road, it is similar to walking in the mud, and the rolling resistance of the asphalt road will be much smaller.
Carbon deposits were removed and power was restored.
The third part is the engine. After high-speed operation, some carbon deposits in the engine will be removed. New york West Eslip Automobile Technology Company has a saying that keeping the engine running at high speed can blow out a part of the so-called "garbage" in the engine, that is, carbon deposit.
With less carbon deposition, the engine runs more smoothly, which naturally makes people feel that the power is getting better. What should I do if I really want to remove carbon deposits?
However, if some friends want to deal with carbon deposits in this way for a long time, the effect may not be as good as expected. Because the carbon deposition in high-speed cleaning is only a relatively small part, there are quite a few parts of the engine that produce carbon deposition.
For example, spark plug electrode, piston top and combustion chamber surface, piston ring groove, valve assembly, intake manifold gasket and exhaust muffler inner wall will all produce carbon deposit.
If you want to clean up the carbon deposits in all parts of the engine, you can go to a professional repair shop and turn on the engine for a thorough cleaning, usually hundreds to thousands, and the effect is good.
But if you are worried about taking it apart and putting it back, it seems different. You are worried that the car will be damaged.
Or you just can't bear to wait in line, or go on purpose, then you might as well consider using clean fuel oil to remove carbon deposits, which is still effective.