What is the reason for the appearance of black carbon particles in the exhaust pipe!

Objectively speaking, most of the time, this situation does require carbon deposition.

Because those black particles are actually carbon particles. Whether it is gasoline or diesel, the main components contained in it are carbon, hydrogen, and oxygen.

When the fuel is burned, it is mainly the reaction of carbon and oxygen, and the reaction of hydrogen and oxygen produces energy, but the binding of hydrogen is stronger, so in the case of insufficient oxygen, hydrogen will be completely consumed, but the carbon may be excessive, and the excess carbon will be discharged in the form of granules, and part of it will stay in the engine to form the commonly known carbon deposit.

These carbon particles, in fact, can continue to burn. Some cars emit black particles, mainly when the car is in the idle stage and the engine speed is relatively low, and the vehicle condition at this time determines that the fuel cannot be burned normally, so the discharge of particulate matter does not explain the problem, but if the car is driving, it still emits a large amount of black particles, in fact, it is likely that there is too much carbon deposit.

There are many ways to judge whether there is more carbon deposit, such as whether the fuel consumption of the car has increased, whether it shakes when idling, whether the power has declined, etc., but once these phenomena appear, it has shown that the carbon deposit has been more serious, in fact, the better way is to use the endoscope directly.

Reaching inside the engine for inspection, or for a little more troublesome disassembly, it is very reliable and intuitive to inspect with the naked eye.

If there is a lot of carbon deposit, you can do oil circuit cleaning in the repair shop by the way, or engine cleaning, if the situation is not serious, in fact, get some fuel treasure yourself.

Because of the special fuel injection method, the external refueling road will be dirty if it is not cleaned regularly, and it will produce a very black exhaust pipe, which should be paid attention to, long-term blackening will lead to a large amount of carbon precipitation, and in the long run, it will burn the engine oil, and the loss will be great. As long as the lower oil exhaust pipe is cleaned, it will become a metal color, and the fuel tank will be added with a national VI standard fuel additive, and the exhaust pipe will not be so black after running 2 tanks of oil, and then use it to restore the metal color.

Objectively speaking, most of the time, it is necessary to remove carbon deposits, because those black particles are actually carbon particles. Whether it is gasoline or diesel, the main components contained in it are carbon, hydrogen, oxygen elements, when the fuel is burned, the main thing is the reaction of carbon and oxygen, hydrogen and oxygen reaction to produce energy, the source macro but the combination of hydrogen is stronger, so in the case of insufficient oxygen, hydrogen will be completely consumed, but the carbon may appear redundant, these excess carbon will be discharged in the form of granules, and part of it will stay in the engine to form the commonly known carbon deposit. These carbon particles, in fact, can continue to burn.

Some cars emit black particles, mainly when the car is in the idle stage and the engine speed is relatively low, and the vehicle condition at this time determines that the fuel cannot be burned normally, so the discharge of particulate matter does not explain the problem, but if the car is driving, it still emits a large amount of black particles, in fact, it is likely that there is too much carbon deposit. There are many ways to judge whether there is more carbon deposit, such as whether the fuel consumption of the car has increased, whether it shakes when idling, whether the power has declined, etc., but once these phenomena appear, it has been shown that the carbon deposit has been more serious, in fact, the better way is to directly use the endoscope to extend into the inside of the engine for inspection, or to disassemble and inspect it a little more troublesomely, so that it is checked by the naked eye, which is very reliable and intuitive. If there is a lot of carbon deposits, by the way, you can do oil circuit cleaning in the repair shop, or engine cleaning, such as the state cracked car fruit is not serious, in fact, get some fuel treasure yourself, and then use it when refueling, in fact, it has a good removal effect on the carbon deposits formed.

Yes, there are no burning carbon particles that collect on the exhaust pipe, the color of the carbon is black, and it is black to the touch. But this only means that there is carbon deposits in the exhaust pipe, not necessarily a lot of carbon deposits in the engine.

When actually using the car, there will be many kinds of incomplete combustion conditions, such as idling in place, when the cold car is just on fire, when accelerating sharply, and so on. As long as the mixture is too concentrated, it will be burned incompletely to produce carbon particles.

Accelerating sharply, I saw a puff of black smoke coming out of the exhaust pipe, which was caused by incomplete combustion, and the smoke contained a large number of carbon particles that were not burned, so it appeared black. Some of the carbon particles will accumulate at the exhaust pipe mouth, and if there are too many of them, they will turn black. It depends on the operating conditions of the engine, if the car runs after that, the engine speed is relatively high, and the speed of intake and exhaust is relatively fast, which will wash away the carbon deposits.

Although the combustion just now did not completely produce a little carbon deposit, the carbon deposits were gently attached to it, and most of it was washed away by the current high-speed air flow. At the end of the exhaust pipe, the exhaust speed is already very slow, and the carbon deposits generated just now cannot be washed away, so there will be more and more. In this case, the exhaust pipe port is very black, but there is not much carbon deposit in the cylinder.

Photo by Chen Jie2) @2019

The blackening of the exhaust pipe is caused by the accumulation of several carbons: 1. It is normal for there to be black powder in the exhaust pipe, as long as it is not wet and greasy; 2. There are many reasons for its formation, which may be the burning of engine oil; It may be that the gasoline oil is not good; It may also be related to your driving habits, and the habit of accelerating sharply on the road and the big throttle causes insufficient combustion and forms carbon deposits; 3. Carbon deposition refers to the hard cemented carbon formed by the continuous accumulation of hard cemented carbon (that is, carbon deposits) produced by the fuel and the lubricating oil that are connected to the combustion chamber when they cannot be completely burned (the main components are hydroxy acid, asphaltene, oil filling, etc.), so as to adhere to the intake and exhaust valves, cylinder edges, piston tops, spark plugs, and combustion chambers.

Blackened exhaust pipes are a problem that most car owners will encounter, and some car exhaust pipes will be very black. You have to know that not all cars will be so dark for a long time, what is the reason for the blackening of the exhaust pipe? Is the black exhaust pipe carbon deposit?

Is the black exhaust pipe carbon deposit?

In fact, it is relatively normal for the car exhaust pipe to be blackened. As long as the car we drive burns oil, then the exhaust pipe will accumulate some black solids, but some cars accumulate less, and some cars accumulate more, and these black solids are actually carbon deposits, so why do carbon deposits accumulate in the exhaust pipe?

Why is the exhaust pipe black?

1.The root cause of carbon deposition is that the fuel is not fully combusted, and the factor that causes carbon deposition is generally the poor ratio of empty fuel to fuel. So, if you don't have good driving habits, or if your car lacks maintenance, carbon will build up in the exhaust pipe, so it's important to develop good driving habits.

2.In addition to the air-to-fuel ratio, poor fuel quality is another factor that can easily lead to large carbon deposits on land. I believe that most car owners know that the quality of fuel in China has never been good, but in this way, some people will choose to go to private gas stations to refuel, which is undoubtedly worse, so it is necessary to choose regular gas stations to refuel.

3.In addition to the influence of external factors, the configuration of the car itself sometimes determines a lot of praise. For example, cars with direct-injection turbocharged engines are more likely to form carbon deposits than self-priming engines, which is unavoidable.

According to surveys, about 80% of turbocharged engines have black exhaust pipes. Obviously, this type of car requires good driving habits and regular maintenance from the owner.

It is normal for the exhaust pipe to be dirty, and the abnormal consumption of oil, insufficient gasoline combustion, poor oil quality, and even the addition of inferior "fuel treasure" may cause the exhaust pipe to turn black, which is not directly related to carbon deposits.

Although the blackening of the exhaust pipe is not a lesion, but after long-term accumulation, carbon deposits will damage the engine, aggravate wear, power will naturally decrease, noise will increase is inevitable, and fuel consumption will also increase. Regular maintenance of the oil circuit, intake and exhaust system is the best choice to reduce carbon deposition and reduce exhaust emissions.