What causes foaming in engine oil?

Reason:

1. If there is water in the oil, a large amount of foam will be generated, and the oil will be turbid, also known as emulsification.

2. External pollutants are mixed into the engine oil.

3. A large amount of air will also be produced when a large amount of air enters the air and the breathing hole.

4. The air temperature is close to or lower than the low limit of the ambient temperature recommended for engine oil.

5. The anti-foaming property of the engine oil is not good, and it is necessary to investigate the authenticity of the engine oil, and the use of the same batch of oil products in other equipment and other vehicles.

Engine oil, engine oil or engine lubricant are a class of base oils.

Substances reinforced with additives mainly contain anti-wear additives, detergents and dispersants.

and multi-grade oil viscosity index improvers. Engine oil is used for the lubrication of internal combustion engines. The main function of motor oil is to reduce friction and wear on moving parts and to remove sludge (one of the functions of dispersants) and paint (cleaners) from the engine.

It also neutralizes acids (cleaning agents) produced from the oxidation of fuels and lubricants, improves the tightness of piston rings, and cools the engine by taking heat away from moving parts.

In addition to the basic ingredients mentioned in the previous paragraph, almost all lubricants contain corrosion (rust) and oxidation inhibitors. The oil can consist only of the lubricant base oil and does not include the cleaning oil component; Or it can be composed of lubricant base oils plus additives to improve the detergency, extreme pressure performance and corrosion inhibition of engine parts.

If you find that there are several possibilities for foaming, one is that it has entered other substances, resulting in a rapid decline in the performance of the oil, so it foams. Or water ingress, because the engine is operating at a very high temperature, so the air in the water evaporates to form bubbles. The second is that the oil has not been changed for a long time, and the oil performance has declined.

The third possibility is that there is a problem with the quality of the engine oil itself, which we cannot judge with the naked eye. Either way, the oil should be changed in time to avoid mechanical damage to the engine. Because from the ** point of view, after all, the engine oil only needs a few hundred dollars, and if the engine fails, it may not be repaired for thousands of dollars.

Answer: The foaming of the engine oil is caused by the high temperature of the engine and the large other mixtures.

The oil foams, indicating that the quality of the oil is not good, and it does not meet the standard, so it needs to be replaced.

Reason: The oil is repeatedly stirred inside the engine, which naturally produces a lot of foam. These bubbles are harmful in two ways:

1. Foam reduces the protection of engine oil to the engine;

2. The foam increases the surface area of the contact between the engine oil and the air, and accelerates the oxidation of the oil.

Defoamers are also essential in order to reduce the hazards caused by these two conditions. Defoamers are the most common additives in motor oils, and different oil brands will adjust different additive formulations according to the characteristics of their base oils, but the basic principle is always the same.

1. If there is water in the oil, a large amount of foam will be produced, and at the same time, the oil will appear turbid and stuffy, also known as emulsification.

2. External pollutants are mixed into the engine oil.

3. A large amount of air will also be produced when a large amount of air enters the air and the breathing hole.

4. The air temperature is close to or lower than the low limit of the ambient temperature recommended for engine oil.

Workarounds and Hazards:

1. Excessive moisture will reduce the performance or even fail the use of some additives in automobile lubricating oil, destroy the viscosity of the lubricating oil, and fail to form a good lubricating oil film on the sports friction pair, so that the machinery will be worn out and even lead to mechanical failure.

2. When the car lubricating oil contains excessive water, the lubricating oil will show a milky white foam state, and the engine needs to be cleaned and the lubricating oil replaced immediately.

Some of the air dissolves into the lubricating oil, and the air naturally dissolves into the oil when the lubricating oil comes into contact with the air in the environment. The amount of air that can be dissolved in the lubricant depends on the temperature, pressure, and the solubility of the lubricant itself to the air. The air that is not dissolved in the lubricating oil is usually because the air is involved in the lubricating oil and bubbles are formed, such as agitation during mechanical operation, air inhalation in the suction pipe, air leakage in the oil circuit and seal, agitation and air involvement in the oil flow of the return pipe.

Another cause of foam is the agitation of the machinery when the lubricating oil comes into contact with the air. In the operation of the lubrication system, due to intense stirring and splashing, air is stirred into the oil to produce foam, and the oil contains a cleaning and dispersing agent, so it is easier to produce foam that is difficult to disappear.

Generally, it is normal for lubricating oil to have bubbles, depending on the length of time the bubbles disappear.

During the operation of lubricating oil, due to the presence of air, foam is often generated, especially when the oil contains surface-active additives, it is more likely to produce foam, and the foam is not easy to disappear. The foam generated in the use of lubricating oil will destroy the oil film, sinter the friction surface or increase wear, and promote the oxidation and deterioration of the lubricating oil, and also make the lubrication system air block, affecting the lubricating oil circulation. Therefore, foam resistance is an important quality indicator for lubricating oils, etc.

Judge whether it can be used: If there is no professional equipment, follow the following method: dry 1 transparent plastic bottle (must be dry), fill the bottle with 7 percent of the height of lubricating oil, and shake it in your hand at a frequency of 120 minutes.

After one minute, it is placed on the platform for observation, and if the bubbles are exhausted within 10 minutes, it is qualified.

Answer pro Hello, I am happy to serve you, the reason for the foam in the oil: 1. There is moisture in the oil: a large amount of foam will be generated, and the oil will be turbid, also known as emulsification.

2. External pollutants are mixed into the engine oil. 3. Entering a large amount of air: Channeling and breathing holes entering a large amount of air will also produce a large amount of foam.

1. Lubrication failure: excessive moisture will reduce the performance or even failure of some additives in automobile lubricating oil, destroy the viscosity of lubricating oil, and fail to form a good lubricating oil film on the moving friction pair, so that the machinery will produce abnormal wear and even lead to mechanical failure. 2. Need to clean and replace:

When there is an excess of water in the lubricant of a car, the oil will show a milky white foam state, and in this case, the engine needs to be cleaned and the oil changed immediately.

Solution and harm: Excessive water will reduce the performance of some additives in automobile lubricating oil or even fail, destroy the viscosity of lubricating oil, and fail to form a good lubricating oil film on the sports friction pair, so that the machinery will produce abnormal wear and tear, and even lead to mechanical failure. When there is an excess of water in the lubricant of a car, the oil will show a milky white foam state, and in this case, the engine needs to be cleaned and the oil changed immediately.

Foaming occurs when engine oil is violently agitated, mixing air into the oil.

Hazards of using low-quality diesel:

1. High sulfur content: destroy the quality of the oil, make the oil prematurely reduce the performance, so that the engine can not get good lubrication.

2. The low calorific value does not reach the specified value: the fuel consumption rate is higher than the rated power of the calibrated engine.

3. High carbon residue: combustion produces too much carbon deposit, which affects the combustion effect of the engine, and the combustion chamber temperature is too high, resulting in early damage to the piston, piston ring and cylinder liner. The fourth hazard of using inferior diesel fuel in Xianghan:

4. High moisture content: destroy the lubrication of the precision parts of the fuel pump and fuel injector.

5. Contains many impurities: damage to the precision parts of the fuel pump and fuel injector, and the wear of the nozzle hole of the fuel injector becomes larger.

6. The diesel partition is easy to block, the power of the generator set decreases, and the replacement interval of the diesel partition is shortened.