What causes carbon deposits? What are the reasons for carbon deposits?

To know the best way to clean up carbon deposits, first know how it is created.

Why is carbon deposited generated? This is because the fuel itself contains gum, impurities, dust, moisture, etc., which accumulate over time to form sludge and other deposits in the fuel tank, oil inlet pipe, etc.; The second is due to the oxidation and polymerization of unstable components such as olefins in gasoline at high temperatures, forming colloidal and resinous viscous, which stays in the fuel injector, air intake valve, etc., and the deposit will become hard carbon deposits when burned. In addition, traffic congestion, cars are often at low speed and idling, which can aggravate the formation and exacerbation of carbon deposits and sediments.

If carbon deposits are not cleaned in time, carbon deposits and deposits will block the needle valve and valve hole of the fuel injector, resulting in poor closure of the intake valve, a drop in cylinder pressure or even tempering, resulting in unstable engine idling, increased fuel consumption and deterioration of exhaust emissions.

Carbon deposits on the piston top and cylinder head can easily cause local overheating of the combustion chamber and gasoline preheating, resulting in engine knocking and other failures. These failures can shorten the life of the engine.

The best way to clean up carbon deposits in your car:

1. In fact, the hanging bottle is filled with a pressurized atomized cleaning agent, and the cleaning agent is sent into the air inlet to carry out a "solvent dissolution" reaction with the carbon deposition of the throttle valve, fuel injector and other components, and then the carbon deposition is cleaned out of the engine by using the high engine speed, but the carbon deposition is very serious, which will cause the three-way catalytic system to be blocked or even damaged;

2. The use of detergent pours the cleaning agent into the machine, sprays it into the combustion chamber with machine pressure, allows the cleaning agent to react with the carbon deposit to dissolve, and then extracts the waste liquid, if the carbon deposit is very serious, the large carbon that falls can not be completely extracted, which may damage the combustion chamber;

3. It is best to use an effective release agent, which will clean the oil circuit and carbon deposits, and release the piston ring. If you want to use a PNF-type cleaner, you can release the piston ring.

Carbon deposits are deposits that result from incomplete combustion of fuel and lubricant mixed blow-by. The formation of deposits (mainly hydroxy acids, asphaltenes, tar, etc.) is directly related to the "fuel" and "lubricating oil" of automobiles. Carbon deposition can be divided into two types: valve, combustion chamber carbon deposition and intake pipe carbon deposition.

Carbon deposits reduce engine power, causing uneven and gradual degradation of power output, in other words, less and less power. It will also increase fuel consumption and increase the economic burden. Eggs may also make it difficult to ignite and not easily land in the car.

Serious carbon deposition in the combustion chamber will also cause cylinder knocking, and there will be a sound of acceleration at low speed, which will cause damage to the piston and crankshaft, thus seriously affecting the safety of the car.

Si Youpu said that the reason for the formation of carbon deposits is introduced.

It is generally believed that during the operation of the engine, the colloidal residue produced by the insufficient combustion of the combustible mixture formed a carbon deposit, which adhered to the cylinder head and the cremation plug, which affected the normal operation of the cylinder and reduced the performance of the engine. In the long run, the formation of carbon deposits will gradually intensify.

The necessary condition for the occurrence of carbon deposition is insufficient combustion. So, the compression ratio and the recommended fuel label that have been determined in the early stage of the engine design are designed according to the conditions of full combustion, but why does insufficient combustion occur in actual use? As a car owner, how can you reduce the generation of carbon deposits?

1.The working load profile of the engine is subject to change. The engine can only reduce the formation of carbon deposits if it is always in good working condition. When the engine is not in good condition, the vibration tends to intensify and begins to make a painful "boom" sound, and carbon deposits are mainly generated during this period.

2.Driving habits are diverse. Many drivers simply pursue the fuel-saving concept of driving at low speed and high gear of the engine, but ignore the synchronization of throttle and speed, resulting in overload of the engine, and then forming carbon deposits.

3.If the oil product number does not match the compression ratio, the atomization and ignition of oil molecules will be asynchronous and the combustion will cause incomplete combustion, which will cause carbon deposits in the fuel supply system, such as the fuel injector, the combustion chamber of the engine, the piston ring groove, the spark plug, the back of the intake valve, and the intake tract.

4.Road. Driving on highly congested roads, the vehicle is always in a stop-and-go state, the engine can not run at high speed, the fuel or the lubricating oil that jumps into the combustion chamber can not be burned 100%, and the unburned part of the oil forms a gum under the action of high temperature and oxygen, adheres to the surface of the parts inside the engine, and then forms carbon deposits through the action of high temperature.

5.Inferior gasoline was added. Low-quality gasoline contains a large amount of gum, which enters the combustion chamber with gasoline through the vehicle's fuel supply system, and then burns with gasoline to form carbon deposits.

Si Youpu said that the reason for the formation of carbon deposits is introduced.

Motivational carbon deposits are the product of incomplete combustion of fuels and lubricants. It is closely related to the environmental conditions in which the fuel and lubricant are used, the associated properties and the quality of the oil itself. Therefore, all the influencing factors that cause the incomplete combustion of fuel and the abnormal entry of lubricating oil into the high temperature part of the engine are the causes of carbon deposit.

The gasoline engine mixture is too thick, the diesel engine fuel supply is too large, and the air filter or airway is blocked, so that the air supply is reduced, resulting in a decrease in the air-fuel ratio, and the fuel cannot be completely combusted.

The ignition time or fuel supply time is not accurate, resulting in a change in the combustion temperature, and it is difficult to ensure that the fuel is completely combusted. If the ignition is too early, part of the combustion process will be carried out in advance in the compression stroke, so that the gas pressure reaches the maximum value before the piston reaches the top dead center; Fuel consumption increases and ignition is too late, and the combustion process will be delayed in the expansion stroke, resulting in a decrease in combustion pressure and an increase in fuel consumption.

The engine temperature is too low, and the spark plug or injector is not working well, resulting in poor atomization or vaporization, so that the fuel cannot be completely burned. When assembling, the piston ring is counterparted, the reverse piston ring is installed in the direction of the twisted ring groove, the elasticity of the piston ring is weakened, or the end clearance is too large due to wear, the piston ring and the cylinder wall are too large, or the cylinder wall is worn too much, resulting in poor sealing, resulting in oil channeling into the combustion chamber.

Poor sealing of valves and valve seat inserts, excessive wear of valve stems and valve guides, and excessive clearance lead to oil entering the cylinder and adsorbing on the valves.

The quality of the fuel is poor, there are many impurities, and it does not meet the regulations. Fuel quality has a great impact on the pollutants emitted by automobiles, among which olefins, aromatics and metallic substances increase the carbon deposits in the cylinder, which increases the exhaust emissions. The fine dust particles contained in the air cannot be completely removed by the air filter, and the oil and gas wash over the back of the valve, causing fine scratches after a long time of washing. Fine particles and lubricating oil from the crankcase are stored in the scratches, forming a lacquer at high temperatures, which accumulates over a long period of time and forms carbon deposits with wax and other components in the mixed fuel.

Traffic congestion makes the engine run at idle speed for a long time, resulting in a thicker gasoline engine mixture, when the thicker mixture passes through the intake manifold of different widths, different lengths and has a certain bending arc, due to the different densities of air and gasoline particles, the air is relatively easy to change direction, and the gasoline particles continue to move to the end of the manifold by the action of inertial force, resulting in poor uniformity of mixture concentration. There is no guarantee that the fuel will burn completely.

1. Congested traffic. Heavy traffic is one of the causes of carbon deposits, as engines are idle for long periods of time and frequent engine starts.

Second, add to inferior gasoline. We call on everyone not to go to private gas stations to refuel, and try to choose large state-owned enterprises such as Sinopec and PetroChina to avoid the formation of carbon deposits due to the insufficient combustion of inferior fuel.

3. Bad driving habits. In order to save fuel, many people ignore that the engine speed and throttle need to be synchronized, and the engine should not be driven at low speed and high gear for a long time.

Fourth, the engine is overloaded. Usually driving a vehicle is too "violent", or the engine is not able to take a break after a long period of work, generally speaking, the carbon accumulation of the car with a long mileage every day will form faster. Long-term overload of the engine can also cause carbon deposits.

The main reasons for the formation of carbon deposits are as follows.

First, the vehicle travel time is short, no more than 30 kilometers per day, and the driving speed is low, second, the gasoline mark used is too low, the combustion performance is not good, third, the engine valve oil seal, piston ring sealing effect is poor, and the phenomenon of burning engine oil occurs, on the one hand, because of the crankcase forced ventilation system, which is not suitable for the installation of oil and gas separator, resulting in the burning of engine oil.

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1.Drivers have long-term bad driving habits, and many drivers are reluctant to step on the accelerator in order to save fuel and cherish the car when driving, so that driving will not only not save fuel but also increase engine carbon deposits;

2.The quality of the gasoline added by the car is poor, and when there are many impurities in the gasoline, carbon deposits will be formed after combustion in the engine;

3.The carburetor of the engine is aged or damaged.

First, the vehicle travel time is short, no more than 30 kilometers per day, and the driving speed is low, second, the gasoline mark used is too low, the combustion performance is not good, third, the engine valve oil seal, piston ring sealing effect is poor, and the phenomenon of burning engine oil occurs, on the one hand, because of the crankcase forced ventilation system, which is not suitable for the installation of oil and gas separator, resulting in the burning of engine oil.

What are the causes of the formation of car eggs? If you remember the reason for the formation of eggs, if you compare it in the process of driving the car, it may be its form process, and the power is too much, and it may be that the power is insufficient.

The owner's long-term bad driving habits, the oil number and compression ratio are different

1. How to prevent carbon deposits1. Fill with high-quality gasolineImpurities such as wax and gum in gasoline are the main components of carbon deposits, so gasoline with high cleanliness has a weaker tendency to form carbon deposits. In order to ensure the cleanliness of gasoline, some car owners will adopt the practice of adding gasoline detergent to gasoline. This can effectively prevent the formation of carbon deposits on the metal surface, and can gradually activate the original carbon deposits and slowly remove them, so as to protect the engine from damage.

However, the addition of gasoline detergent must be cautious, if you add shoddy products, you will get the opposite effect.

2. Do not idle for a long timeThe longer the idle time, the longer the engine reaches normal temperature, and the slower the rate of evaporation of gasoline when it is injected into the back of the valve, which creates carbon deposits. At the same time, if you are driving at idle speed, the air flow into the engine will be small, so the scouring effect on carbon deposits will also be weak, which will promote the deposition of carbon deposits.

2. The hazards of carbon deposits; 1.will increase the fuel consumption of the vehicle;

2.weaken the power of the engine;

3.When the vehicle is idling, the body is prone to shaking;

4.The exhaust emissions of the engine will exceed the standard;

5.When the engine starts, it is not easy to ignite;

6.When carbon deposits are severe, it can also cause damage to the engine's piston and crankshaft.

3. Carbon deposition solutions5000 kilometers of carbon deposits, a long time does not clean up the carbon deposits will cause the operation of the whole vehicle, so that the internal channel of the engine is blocked by carbon deposits, the internal fuel injection of the car is not smooth, so that the engine power becomes poor, thereby reducing the power of the car engine, increasing fuel consumption, and the combustion rate is too low.