Because the in-cylinder direct injection technology is different from the traditional port injection method, the in-cylinder direct injection engine directly injects gasoline into the cylinder for ignition, so the design standard of injector is very high. Although it has the advantages of improving the thermal efficiency of the engine, improving the fuel economy and improving the uniformity of each cylinder, the disadvantages are also obvious, such as easy to cause the problem of engine oil dilution, high requirements on fuel quality and easy to produce carbon deposition.

The phenomenon of increasing engine oil mostly occurs in colder areas such as Northeast China. Because the fuel of direct injection engine is directly injected into the cylinder, it has more time to mix with air than manifold injection, and more or less fuel will be injected into the cylinder wall to cause wet wall.

Extended data:

Danger:

1, too much oil can easily lead to crankcase explosion. Too high oil level is easy to produce oil and gas under the agitation of the big end of the connecting rod, which will ignite and burn at high temperature, resulting in crankcase explosion. This result is very serious.

2. Too much oil can easily lead to oil leakage. Too much oil will increase the pressure of the lubrication system, which will easily damage the oil seal and lead to oil leakage. Especially at the front and rear ends of the crankshaft, it increases the consumption of engine oil, which is easy to pollute the environment and increase the difficulty of maintenance.

3. Too much oil will increase wear and reduce lubrication performance. Too much oil mixing in the crankshaft will not only splash the oil, but also make the oil bubble. Oil with bubbles entering the lubrication system will lead to the wear of cylinders and pistons.

4. Too much oil can easily lead to deterioration of oil and affect performance. Excessive engine oil tends to rise in temperature under the agitation of crankshaft, which leads to deterioration of engine oil and degradation of engine oil performance.

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