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Carbon plugging does not cause the cylinder head to burst, and there is no such delicate cylinder head unless the cylinder head has a manufacturing defect.
Severe valve carbon blockage will only cause valve jamming, resulting in "top valve" during piston upward movement, resulting in valve bending and piston damage, but the cylinder head will not burst.
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The carbon deposits on the throttle valve change the position of the throttle, and when the engine is idling, the computer receives this error signal and calculates the wrong fuel supply, which increases the fuel consumption of the vehicle.
2) Carbon deposits on the throttle body can lead to acceleration lag and unstable idling.
3) On the one hand, the carbon deposits on the valve occupy the air intake space, which reduces the inflation efficiency and directly affects the power of the car; On the other hand, the dry carbon deposit will also adsorb a large number of gasoline molecules in the combustible mixture, destroying the original mixture concentration, which will lead to fire, cold start difficulty and increased fuel consumption, and more serious carbon deposit will also make the valve closed loosely.
4) The accumulation of unequal carbon deposits on the fuel injector affects the atomization of the fuel injection, resulting in the mismatch of the work of each cylinder and causing obvious engine shaking.
5) The carbon deposition in the combustion chamber makes the combustion chamber volume smaller, the compression ratio increases, and the engine produces detonation, although there are detonation sensors in modern engines to avoid, but this is not the solution to fundamentally eliminate the detonation due to carbon deposition. Hope.
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The main cause of idle jitter;
1. The most common cause of car shaking is that the throttle valve is too dirty or the fuel injector has too much carbon.
2. When the carbon deposition inside the engine is too much, the gasoline sprayed by the cold start fuel injector will be absorbed by a large amount of carbon deposition, resulting in the mixture of cold start being too thin, making it difficult to start, in this case, only when the gasoline absorbed by carbon deposition is saturated, it is easy to get started, 3. After the car is adsorbed, the gasoline adsorbed on the carbon deposition will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, resulting in idle shaking after cold start. The lower the temperature, the greater the amount of oil required for the cold start, and the more carbon deposits will affect the smooth cold start.
Severe idle vibration is generally caused by engine cylinder failure, aging or loose foot rubber, carbon deposits, fuel system failure, etc.
1.Serious engine carbon deposits: Cars always have the problem of carbon deposits, including cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, intake carbon deposits, etc.
When the engine has too much carbon deposit, it will affect the ignition energy, air intake efficiency and air-fuel ratio of the car, resulting in the unstable power output of the car, and the phenomenon of idle speed and acceleration jitter appears.
2.Unstable oil pressure: If you have cleaned the engine carbon deposits, cleaned the throttle, replaced the oil gasket and spark plug, etc.
And when idling, you still find that the body shakes, it is recommended that you go to the 4S shop to check whether the oil supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is abnormal, or the intake pressure sensor value is wrong, and the work is not good, it will cause the body to shake.
3.Engine cylinder shortage: Engine cylinder deficiency mainly refers to the engine one or more poor cylinders work abnormally, generally manifested as:
The exhaust fumes coming out of the car are obviously intermittent, and the exhaust pipe shakes violently, and the engine shake can be clearly felt, sometimes accompanied by abnormal noises. This is mostly related to ignition coil failure.
4.Aging of engine parts: Shake in the car is also associated with the aging of the engine feet (also known as claw pads).
The engine foot is actually the shock absorber system of the engine. The engine feet are responsible for absorbing the slight vibrations of the dissipated engine when it is running. If there is a problem with the engine base, these vibrations can be transmitted to the steering wheel and cab, causing vibrations at idle.
Solution; The best way is to clean the oil circuit, clean it regularly, and use PNF fuel additives to solve the above problems caused by carbon deposits. The fuel quality is not very good or the initial fuel of the new car is stored for too long, resulting in a rapid increase in the colloidal composition of the oil circuit, which will continue to pollute the fresh fuel, resulting in no good fuel to participate in the combustion in the later stage, and the carbon deposition exceeds the standard, which is especially common for China VI cars. We can only gradually alleviate most of the problems by maintaining clean oil circuits.
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Carbon deposition in the automobile engine is an unavoidable problem for EFI vehicles, but the tight gear lever of the carbon deposition shakes badly (such as Dongfeng Citroen's model with a TU5JP4 engine). In this way, although the fuel is sprayed out when refueling, the work can not be effectively output, and the reaction is that the car is unable to accelerate when it is refueled; At the same time, the accumulation of carbon deposits will make the local temperature of the engine rigid body too high, and in severe cases, it will cause local ablation of the cylinder wall; Carbon deposits attached to the piston ring will corrode the piston ring, accelerate its aging and affect its lubrication and sealing, resulting in gas collusion and oil burning.
The factors that affect the car's carbon deposit are oil and temperature, only in terms of speed, the better way to avoid prevention is to regularly pull the car at a high speed, do not last too long, within 30 minutes, run once in half a month, so that the carbon deposit has not had time to accumulate because of the high speed and large air intake under the condition of burning out again.
It's more miscellaneous, I hope it will help the landlord's questions! The rod shakes a lot (such as Dongfeng Citroen's model equipped with a TU5JP4 engine). In this way, although the fuel is sprayed out when refueling, the work can not be effectively output, and the reaction is that the car is unable to accelerate when it is refueled; At the same time, the accumulation of carbon deposits will make the local temperature of the engine rigid body too high, and in severe cases, it will cause local ablation of the cylinder wall; Carbon deposits attached to the piston ring will corrode the piston ring, accelerate its aging and affect its lubrication and sealing, resulting in gas collusion and oil burning.
The factors that affect the generation of carbon deposits in the car are oil and temperature, only in terms of speed, the better way to avoid prevention is to pull the car at a high speed on a regular basis, do not last too long, within 30 minutes, run once in half a month, so that the carbon deposits have not had time to accumulate because of the high speed and large air intake under the condition of burning and discharging again. Sleepy Waiter.
It's more miscellaneous, I hope it will help the landlord's questions!
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Carbon deposits can cause insufficient combustion of gasoline and cause the engine to shake. The impact of engine carbon deposition on the car is quite large, first of all, to reduce the engine power, that is, to make the power output uneven and gradually decay, in other words, more and more powerless. The second is to increase fuel consumption and increase your financial burden.
The third is the difficulty of cold start, that is, the difficulty of ignition, it is not easy to get on the car, and finally the serious carbon deposition in the combustion chamber will also cause cylinder detonation, and there will be a sound of low-speed acceleration, which will cause damage to the piston and crankshaft, thereby seriously affecting the safety of the car. Then the emission exceeds the standard, which not only fails to pass the annual inspection and inspection, but also directly aggravates the harm of polluting the environment.
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In the short term, the cause of excessive carbon deposits in the engine is mainly due to the use of unsuitable oil, which is more likely to occur after returning from a long drive or after the vehicle is lent to someone else. If you drive long distances, you will definitely add fuel from different places, and even if it is the same number of fuel, the quality of the oil will not be the same in different places, so it is likely that the wrong oil will be misused. It is more difficult to control the quality of the added oil when the car is lent to others.
Solution: Add a certain amount of detergent when refueling, if the effect is not obvious, it means that there is more carbon in the engine, in this case, the car must be driven to the 4S shop, and the carbon deposits in the engine will be cleaned by professional and technical personnel. And after cleaning, it is best to drive for a period of high speed, which is conducive to increasing the exhaust volume, so that the stronger air flow than the lead bridge can bring out the larger carbon particles. :
Yan Haitao.
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Carbon deposits are easily generated when the vehicle idles for a long time, drives at low speeds, drives for ultra-short distances, and heats up in situ for a long time.
Low-quality fuel oil contains a lot of impurities, and carbon deposits can occur when combined with inadequate combustion.
It is said that burning engine oil also produces carbon deposits.
HazardsBecause the fuel cannot be fully combusted, there will be some impurities attached to the fuel injector, throttle, oil pipeline, spark plug and other components, thus forming carbon deposits.
If the carbon deposits are not cleaned, it will cause difficulty in starting, unstable idling, decreased power, weak acceleration of the vehicle, and damage to parts step by step.
Pull high-speed carbon deposition?
Theoretically, when running at high speeds, the engine speed is increased, the air intake volume increases, and a little carbon deposit can be removed, but the effect is minimal.
In fact, carbon deposition is inevitably produced by the mechanical movement of the car, and cannot be used to evaluate the quality of a car. We don't need to panic excessively, the best way to clean up carbon deposits is to clean them, and we don't have to think that the engine hurts the bones.
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Carbon deposition is a kind of coke-like substance produced by unsaturated olefins and gum in the fuel at high temperature during the working process of the engine.
Carbon deposits will destroy the engine, that's a bit too exaggerated, almost every car will have carbon deposits, this is very bad cover normal, if too much carbon deposits will affect fuel consumption, affect power and even turn off, but it is also very good to clear the wide calendar, that repair shop can be cleaned up.
In daily use, you can use more oil with better labels, or you can run more at high speed, and do not drive at low speed in the city for a long time, which can effectively reduce carbon deposits.
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The carbon deposition problem will not destroy the engine, at most it will lead to the low efficiency of the engine's dust response work, resulting in insufficient power, or failure to ignite.
Generally, the oil problem of the engine will lead to the destruction of the engine, because the oil is wrong, the engine can not dissipate heat, and the engine will definitely burn out.
If the oil problem is serious, the engine parts are deformed and cracked, and the engine needs to be replaced.
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