I don't know if I don't know, but I was shocked at first sight. I found that many car owners have invented a modified part similar to "IQ appraiser", called oil-gas separator; It is said that adding this separator can avoid carbon deposition in the engine. The principle is that the engine will have the problem of blowby during operation. This statement is correct. When the internal combustion engine does work, it will produce very high temperature and pressure, and the high pressure in the combustion chamber will make some unburned mixed oil and gas, mixed with impurities and particles, escape into the crankcase; Engine oil is stored in the crankcase, and "carbon deposition" will occur when oil and gas are mixed with engine oil at high temperature. Does it make sense?

Let's first look at the concept of gas channeling.

Strictly speaking, there is no necessary relationship between carbon deposition and gas channeling. Carbon deposition is a mixture of hydrocarbons, colloids, particulate matter and impurities, which are all caused by incomplete combustion of fuel. The characteristic of internal combustion engine is that it can't burn fully whether it is hot or cold, so it will form carbon deposits continuously, but there are also ways to prevent carbon deposits by adjusting driving habits.

If the blow-by gas is really excessively mixed with the engine oil vapor in the crankcase, the engine oil mixture will enter the combustion chamber through the "forced ventilation" system-the blow-by gas cannot be wasted, and the pipeline connecting the crankcase and the intake manifold will generate negative pressure suction due to air intake, and the mixture in the crankcase will be sucked into the intake manifold for secondary combustion. Then the intuitive problem is to burn engine oil, and the engine does not burn engine oil, which means that carbon deposition is not necessarily related to engine oil. So where is the oil? The answer is stripped by an oil-gas separator.

The engine already has an oil-gas separator, otherwise a few liters of engine in the crankcase will be many kilometers; Once the oil-gas separator of a well-known German automobile brand was defective, and the oil burning degree reached about 1L/ 1000km, which shows the importance of the oil-gas separator. So far, it can be confirmed that the installation of oil-gas separator has nothing to do with reducing carbon deposition, but can oil-gas separation be further realized? The answer is that it may be strengthened, it may be meaningless, and the normal operation of the engine will be affected with a high probability.

The reason is simple: the intake pressure in different speed ranges is relatively fixed, and the negative pressure connected to the crankcase is of course standard; Adding a separator to the original oil-gas separator will obviously affect the pressure and may cause the engine to run abnormally, but this is not the main problem.

The main products of gasoline combustion are carbon dioxide and water, and about 273 grams of water can be produced per kloc-0/L gasoline consumed. There is still water vapor in the high temperature blowby. The problem that the oil-gas separator installed in an unreasonable position must face is air cooling, which will inevitably produce condensed water. Whether condensed water will flow back to the crankcase is a problem. If there is, water will emulsify the engine oil, and the emulsification will gradually lose its ability of lubrication, sealing, corrosion prevention, rust prevention and cleaning. Therefore, the installation of oil-gas separator is likely to cause problems, which is no longer a problem of gilding the lily.

The oil-gas separator of the original car has been able to ensure the normal operation of the engine. Don't try to add it to the original car. It is irrational to challenge a team of engineers as an amateur unless you face those problem cars.

Other useless modifications include:

These are bullshit accessories. At best, the rotational speed of eddy current is equivalent to the rotational speed of CPU fan, which can not only play the role of active intake and compression in the middle and high rotational speed range of the engine, but also directly affect the intake volume; Hydrogen-oxygen powered riser is an oxygen generator. It is very dangerous to blindly add pure oxygen to the intake system. If the intake oxygen concentration is not well controlled, the combustion temperature of gasoline will be greatly increased, which may cause considerable damage to the engine.

As for the 12V economizer, it has no effect, and its function is limited to seeing a voltage.

The way to prevent carbon deposition should be to adjust driving habits. After cold start, the particulate matter produced during hot start is the most, but it is much less after hot start. If you want to reduce carbon deposition, don't start the car in place after starting, and clean up the carbon deposition by driving at a higher speed (intake and exhaust pressure) normally; If the temperature is too low, you have to wait for the warm air in the hot car, and pulling the high speed several times after the hot car can also prevent carbon deposition.

There is nothing else to pay attention to. If you develop such driving habits, carbon deposition will never be a problem.

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