Engine oil sludge serious how to do automobile engine maintenance skills

Category:Automobile engine repair - Date:2017-09-25

How do the engine sludge be serious?

The oil sludge is a kind of adhesive material with strong adhesion, which mainly appears on the parts of the inner wall of the crankcase, the parts around the convex wheel shaft of the cylinder cover, and the parts near the time gauge cover. Oil as an important lubricant in the engine, if too much oil is blocked, it will cause the parts to lose lubrication, excessive wear and scrap.

below, let's take a look at automotive engine maintenance techniques.

The cause of oil sludge:

there are many reasons for the formation of oil sludge.

first, urban car ownership is getting higher and higher, resulting in urban road traffic congestion, and cars are often at low speed. At this time, the temperature of the crankcase is low, and the fuel injection is higher when the engine is running at low speed. The gasoline fuel that is not completely burned into the crankcase, so the low temperature oil sludge is produced.

second. Modern engines are equipped with a crankcase ventilation valve to balance the pressure of the crankcase when the engine is running at high speed. When the crankcase ventilation valve is partially or completely blocked by oil impurities, oil sludge and other parts, the waste and water vapor in the crankcase can not be discharged in time. After chemical reaction, the sludge is produced, and a vicious cycle is produced, and the sludge becomes more and more serious.

Third, in order to improve the fuel economy, some high performance direct injection engines on the market adopt a technology called thin combustion, which is designed by complex combustion chamber shape, accurate calculation of air flow status and accurate control of ignition time to reduce fuel injection. China's poor oil products and lean oil combustion will inevitably lead to an increase in nitrogen oxides, and exhaust emissions can be resolved through efficient exhaust catalytic converters. The exhaust gas entering the crankcase will promote the formation of sludge due to the high content of nitrogen oxides.

in addition, the low quality of domestic oil and gasoline is also an important cause of sludge production.

The oil sludge is a kind of adhesive material with strong adhesion, which mainly appears on the parts of the inner wall of the crankcase, the parts around the convex wheel shaft of the cylinder cover, and the parts near the time gauge cover. Oil as an important lubricant in the engine, if too much oil is blocked, it will cause the parts to lose lubrication, excessive wear and scrap.

The cause of carbon accumulation:

gasoline is extracted from crude oil, which contains gum in itself. In the combustion process of the engine, due to the high combustion temperature, the time of the gasoline mixture stays short, so there will be some gasification and incomplete combustion of the material will accumulate in the gasoline nozzle, the inlet valve front, the piston top, the spark plug and the combustion chamber.

In addition, the steam of the oil is reused through the oil gas separator (commonly known as “ funnel ”) into the intake manifold into the combustion chamber, in which a small amount of high viscosity oil will be combined with the dust in the air to attach to the intake manifold and the combustion chamber, and high temperature combustion will also form carbon.

carbon deposition is a hard black substance which is strongly attached to the components around the combustion chamber. Causes the mechanism movement to be not smooth, causes the organization to die seriously, damages the engine. The most typical case is that the intake area of the intake valve leads to the tight sealing of the combustion chamber, resulting in insufficient engine power. The engine management system detected that the engine was running unsteadily, thereby lighting up the engine fault lights.

how to solve the problem of oil sludge and carbon deposition? Even in the world, there is no solution to completely eliminate oil sludge and carbon deposition. Therefore, as owners, we can only minimize the damage to vehicles caused by oil sludge and carbon deposition.

For oil sludge:

according to the data, the influence of fuel oil on oil sludge will be larger than that of lubricating oil. Therefore, it is necessary to use high quality fuel. Therefore, it is suggested that the owners should go to the right gas station when they are refueling, such as Sinopec. Small oil stations will sell their own gasoline to reduce their octane number in pursuit of maximum profits. The gasoline with low octane number will undoubtedly make the engine work in a worse working condition, and a series of negative effects such as oil sludge will accelerate.

here is a reminder that most of the genuine petrol stations in China are imported from the oil depots of domestic oil companies. Therefore, there is not much difference in essence except for the additives added to the petrol stations. Nor do we need superstition to say that joint venture brands are better than domestic ones.

most of the additives or inverters in lubricating oil exist in oil sludge. Therefore, it is very important to replace the lubricating oil and the oil filter according to the manufacturer's specified maintenance cycle.

in the selection of lubricants, the types of lubricants should be determined according to the daily use of vehicles. SM grade oil can be selected in the city, and the SL grade oil can be selected for highway driving and low speed constant speed. If the driving condition is more severe, it is recommended to use all synthetic lubricants such as ash shell and Mobil 1.

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