The main problem of “burner oil†is that the design of the oil separator is unreasonable. In addition, poor sealing of the turbine lubrication system and problems with assembly of the piston ring can also lead to burning oil. Because the burning of oil is not only costly and time-consuming, it also causes the vehicle to wear out abnormally and even burns spontaneously. Therefore, for users, once they encounter the problem of burning oil, they still have to deal with it early.
How is the oil burned?
I. The first line of defense was broken: The piston ring usually stays in the lower part of the crankcase (also known as the oil pan), and is pumped up to the top of the cylinder block and cylinder head to provide lubrication and cooling for the engine. It's reasonable to say that you can't leave. However, the oil in the crankcase was disturbed. This is the high-temperature mixture in the combustion chamber. It sneaked into the crankcase from the gap between the piston rings. It also put pressure on the inside of the crankcase.
II. The Solution: Crankcase Ventilation In order to balance the pressure and extend the oil usage time (the temperature inside the crankcase is too high, the engine oil will soon be paralyzed, oh no aging), and there are also considerations for improving emissions. Both are equipped with a forced crankcase ventilation device to introduce the air-fuel mixture in the crankcase into the combustion chamber. However, at the same time with the ventilation, many oil vapors are hooked up with the mixture gas, and the fish is splashed out of the crankcase.
III. Interception success In this move: The oil and gas separator engineers thought that the oil could not run away and it had to be separated from the mixture, so an oil separator was added to the end of the ventilation device, which means separating the oil and the mixture. . In theory, after the separation of oil and gas, the oil returns to the oil path of the cylinder head, and finally returns to the oil pan, and the gas mixture is sent to the combustion chamber to continue the output. However, if the separation of oil and gas separators is not complete, the oil vapors will be burned along with the mixture gas into the combustion chamber. This is the legendary burning oil. The specific performance is that the exhaust pipe emits blue smoke.
We now know roughly that for burning oil, which engines are used to burn oil, and what are the negative effects? Let's continue talking about burning oil.
Turbocharged engine will burn oil more easily?
A: The design requirements for oil and gas separators are higher, and the probability of burning oil will be greater. However, if the design of naturally aspirated engines is not good, the burning oil will also cause burning oil, so we have to say that many brands are widely used today. Turbocharged engines (especially turbocharged direct-injection engines), which do perform cruel and relentless presses on the engine during acceleration, have higher design requirements for oil and gas separation and are more prone to burning oil. Like ordinary people and athletes of the same weight, the former can lift 50 kilograms of weight, the latter can lift 100 kilograms, the same pressure on the latter's joints and muscles.
However, like people with indigestion, people who do not love exercise easily digest indigestible long meat, love exercise can not completely avoid indigestion, and people who love to exercise (natural inspiratory engine) will also work abnormally because of gastrointestinal function (oil and gas separation). Good feelings - This also happens on some naturally aspirated engines whose book parameters are significantly higher than those of the same model. It is still in the high fuel injection and heavy load conditions of the engine in accelerated conditions. At this time, oil and gas separation is easy. Not completely, which leads to the burning of oil.
What's wrong with burning oil?
1 The first disadvantage of expensive and trouble-burning oil is that your trunk should put a bottle of oil on standby. Always pay attention to the height of the oil dipstick, although it will allow you to “get more knowledge of car mechanics†and know how to add oil to your own engine oil. , but it's expensive and troublesome. It's a headache.
As for how much money is spent, we can calculate a bill, in accordance with the national standard "Test method for automotive engine performance" published in 2003 (this standard is still not a mandatory standard, the mandatory standard for oil consumption was established in 1984... ), the provisions of the oil consumption shall not exceed 0.3% of fuel oil, 10 liters of fuel consumption per hundred kilometers, 7500 kilometers (using synthetic oil) within the service mileage of the burning oil must not exceed 2.25 liters, assuming this car burning oil With an additional 2.5 litres per 7,500 kilometers, the result is as follows:
2Influence of emissions and carbon deposition, and even lead to spontaneous combustion. The current car engine design is used to burn gasoline, but such oil into the engine combustion is not a "hybrid" high-tech, it will first affect the vehicle emissions, also Easily lead to carbon deposition - this kind of carbon deposition is not easy to clean, usually requires dismantling to remove, even to the location of the three-way catalytic converter, and even dismantling may not be able to get.
Even more frightening is that crankcase ventilation / oil and gas separation is not easy to lead to valve cover, turbine inlet, etc. Accumulation of oil or leakage, a long time, some oil is easy to access the high temperature exhaust manifold and turbine increase Pressure regulators, or carbon-coated three-way catalytic converters, allow the front of the exhaust to overheat, posing a danger of spontaneous combustion.
Conclusion: The main problem of “burner oil†is that the design of oil separators is unreasonable. In addition, poor sealing of the turbine lubrication system and problems with piston ring assembly can also lead to burning of oil (these are generally found in old vehicles). Because burning oil is not only costly and time-consuming, it also causes the vehicle to wear out abnormally and even burns spontaneously. Therefore, if the user encounters the problem of burning oil, he or she will have to deal with it early. (If it is a design problem, it may not be possible...) Don't take the blue smoke out of the way.
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