What happens if the car doesn t have a carbon canister, and what happens if the car carbon canister

Carbon canisters. activated carbon.

Absorb the fuel vapor volatilized by the fuel tank, and return to the intake manifold after the car starts, so as to achieve the purpose of fuel saving and environmental protection. Prone to problems:1

Accelerator acceleration when the car is crushed. (It is air rather than fuel vapor that enters the engine inlet tract, which will inevitably cause the engine mixture to be too thin, resulting in irregular congestion.) )2.

The smell of gasoline in the car is relatively strong. (Gasoline vapor is directly emitted into the atmosphere, causing the smell of gasoline in the car.) In fact, it is not very harmful, and it is better to have a carbon canister.

In the future, repair the car and find a repair that is both good and cheap! The previous solution to the hidden danger was to tie the two pipes to death.

To put it simply, this valve controls whether the fuel vapor in the canister is pumped into the cylinder by the engine for combustion.

This valve is controlled by the engine computer, which means that whether it opens or closes is controlled by the engine computer (ECU). When this valve is opened, the fuel vapor stored in the canister will be sucked into the intake pipe of the engine and then enter the cylinder for combustion; When this valve is closed, the fuel vapor stored in the canister cannot enter the engine's intake duct.

In other words, this valve is a solenoid valve installed between the canister and the inlet pipe.

I don't know if you understand when I say that??? If you don't understand, you should first understand what the canister is used for, and if you understand the function of the canister, you will be able to understand the role of the canister control valve.

If the car canister is broken, it will make the vehicle step on the accelerator, and the smell of oil in the car is larger, tooIt will cause the engine to idle up and down and accelerate weakly. If you encounter a fault when stepping on the accelerator to accelerate, and the gasoline smell in the car is relatively large, you should pay special attention to whether the pipes in the carbon canister system are damaged. Gasoline vapor is discharged directly into the atmosphere along the damaged area, causing the smell of gasoline in the car.

If the engine is started and the speed of the car is weak when idling, it is necessary to pay attention to whether it is caused by the blockage of the air inlet and filter of the carbon canister.

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Dear, hello, the fault of car canister damage is as follows: first, the vehicle is not satisfied when refueling normally, it is easy to jump the gun in advance Second, the vehicle engine bursts the engine fault lamp, most of this situation is caused by the blockage of the carbon canister, this phenomenon needs to be replaced with a new carbon canister.

Start the engine and run at idle speed.

Dial off the pipe connecting the fuel tank, then you can feel the suction phenomenon at the joint of the carbon canister, and this suction phenomenon is intermittent, the frequency is about two or three times a second; If there is no suction phenomenon, it means that the solenoid valve is stuck in the closed state.

Remove the plug of the solenoid valve of the canister, if the suction phenomenon stops, it means that the solenoid valve is working normally, if it is still inhaled, it means that the solenoid valve is stuck in the open state.

The canister is generally installed between the gasoline tank and the engine. Since gasoline is a volatile liquid, the fuel tank is often filled with vapors at room temperature, and the role of the fuel evaporative emission control system is to introduce vapors into combustion and prevent volatilization into the atmosphere. An important part of this process is the activated carbon canister storage device.

Working process: Because activated carbon has adsorption function, when the car is running or turned off, the gasoline vapor of the fuel tank enters the upper part of the activated carbon tank through the pipeline, and the fresh air enters the activated carbon tank from the lower part of the activated carbon canister. After the engine is turned off, the gasoline vapor is mixed with fresh air in the tank and stored in the activated carbon canister, when the engine starts, the electromagnetic valve of the fuel evaporation purification device installed between the activated carbon canister and the intake manifold is opened, and the gasoline vapor in the activated carbon canister is sucked into the intake manifold to participate in combustion.

Gasoline is volatile fuel, the fuel in the tank will quickly volatilize to increase the pressure inside the tank, when the pressure reaches a certain value, it will produce a certain danger, so people want to balance the pressure, at first the fuel tank cover is made into a pressure limiting valve, when the pressure is higher than a certain value, the pressure limiting valve is opened, and the gasoline vapor is discharged into the atmosphere.

Principle and function: The carbon canister is actually a part of the gasoline evaporation control system (EVAP), which is introduced to avoid fuel vapor escaping into the atmosphere after the engine stops running, and since 1995, China has stipulated that all new cars must have this system. How it works:

After the engine is turned off, the gasoline vapor is mixed with fresh air in the tank and stored in the activated carbon canister, when the engine starts, the electromagnetic valve between the activated carbon canister and the intake manifold is opened, and the gasoline vapor in the activated carbon canister is brought into the cylinder by clean air to participate in combustion under the vacuum degree of the intake pipe.

After the car has traveled a certain distance, stop, keep the engine running, and then poke the fuel nozzle cap with your hand, if there is an inhalation sound, it means that the canister is blocked. In addition, when the canister is clogged, the car will have a distinct smell of gasoline. If the car is left outdoors for a long time, a large amount of gas will be sprayed out after opening the fuel tank cap, which also means that the car's carbon canister is clogged.

The activated carbon particle hole of the carbon tank is easy to be blocked after long-term use, and the blocked fuel hole makes the gasoline vapor nowhere to discharge, resulting in excessive exhaust gas pressure in the fuel tank, resulting in cracks in the riveting interface or other interfaces of the oil circuit in the fuel tank, causing oil leakage, and it is easy to cause spontaneous combustion accidents when encountering sparks. Regular inspections not only reduce the chance of oil circuit failures, but also prevent accidents caused by oil and gas leaks.

The carbon canister is actually a part of the gasoline evaporation control system, in which the carbon canister is the most important key device in this system, the main function of collecting and storing gasoline vapor is completed by it, the carbon canister installed on the car is actually an assembly, its shell is generally made of plastic, the inside is filled with activated carbon particles that can adsorb steam, and the top is also equipped with a cleaning control valve for controlling the amount of gasoline vapor and air entering the air manifold, as well as a filter screen for purifying gasoline vapor.

After the engine is turned off, the gasoline vapor is mixed with fresh air in the tank and stored in the activated carbon canister, when the engine is ignited, the electromagnetic valve between the activated carbon canister and the intake manifold is opened, and the gasoline vapor in the activated carbon canister is brought into the cylinder to participate in combustion by the filtered clean air under the action of the vacuum degree of the intake pipe, which not only reduces emission pollution, but also reduces fuel consumption.

The canister is just an accessory to a car, which is supposed to be dispensable. Not installing does not have any effect on the engine. But why is a carbon canister installed in every car?

The purpose of the existence of carbon canisters is to reduce the environmental pollution caused by fuel evaporation. Everyone knows that gasoline is very volatile. If the tank is closed, gasoline volatilization can cause a very high pressure inside the tank.

In the event of a collision, the consequences are extremely serious, and the high pressure also places high demands on the manufacturing process of the fuel tank.

One end of the canister is connected to the top of the tank by a conduit, and when the steam pressure is too high, the steam will enter the canister through the conduit and be stored in the canister. The other end of the canister is connected with the intake manifold, and the solenoid valve controls the connection of the pipeline. When the car starts again, the canister control valve opens, and the gasoline vapor stored in the canister is sucked into the intake manifold to participate in combustion.

In order to prevent the pressure from being too high, a pressure relief valve is designed on the fuel tank cover, and when the pressure is too high, the pressure relief valve will open to relieve pressure. BYD F0's earlier fuel tank cap was not designed with a pressure relief valve, resulting in too high fuel tank pressure and the fuel tank cap could not be screwed. Later improvements were made with the addition of a pressure relief valve.

Early vehicles were not equipped with carbon canisters, and after the fuel evaporated, it was discharged directly into the atmosphere through the fuel filler. Later, in order to reduce the pollution to the environment, a filter device was added to the carbon canister, and the following picture shows that the carbon canister has a total of three pipes, which lead to the atmosphere, fuel tank, and engine.

The simple principle is that the engine generates a vacuum, filters the volatile gas from the fuel tank through the carbon canister, and then sucks it into the engine cylinder for combustion. This not only avoids pollution to the environment, but also reduces engine fuel consumption.

As long as the carbon particles in the canister do not enter the liquid gasoline, it can usually be used for more than ten years.

The carbon canister in the car can absorb some impurities, and then it is more energy-saving and environmentally friendly.

There is activated carbon in our water filters and air purifiers, so the carbon canisters in the car are used to absorb some impurities.

The main purpose is to save energy and reduce emissions and reduce environmental pollution.

The carbon canister is generally installed between the gasoline tank and the engine, and the carbon canister is carbon as the name suggests, but this carbon is not the charcoal we use for barbecue, but the real activated carbon, so what is the use of this thing? When I was in elementary school, I was taught in the natural knowledge class that activated carbon has good adsorption, such as odor and impurities, so now we have activated carbon in our water filters and air purifiers, so the carbon canister in the car is to absorb some impurities.

Because this kind of equipment can be more convenient, sometimes it can be used to adsorb some impurities.

The installation of carbon canisters in automobiles is the crystallization of human wisdom and the necessity of practical testing, mainly for energy saving and environmental protection.

It can adsorb carbon deposits, prevent carbon deposits from clogging the operation of other machines, and ensure safe driving.

When I was in elementary school, I was taught in the natural knowledge class that activated carbon has good adsorption, such as odor and impurities.

The purpose of installing a carbon canister on the car is to purify the air and precipitate impurities.

The function of the carbon canister is simply "oil collection", gasoline is a very volatile fuel, even below zero degrees will be volatile, and the higher the temperature, the greater the speed and degree of volatilization; Gasoline volatilization into a gaseous state will inevitably cause volume expansion, if the fuel tank is designed to be absolutely sealed, then both plastic fuel tanks and welded metal fuel tanks may be burst. In order to protect the tank, the canister system is designed, the canister will be connected to the top of the tank by pipes, and the volatile gasoline vapor will be squeezed into the canister through the pipe.

The activated carbon inside the canister adsorbs the fuel, and the filtered air is discharged to the outside through the breathing port. This equalizes the pressure in the fuel tank, while after starting the vehicle, another line connecting to the intake manifold creates negative pressure. The high-pressure air flow from the intake manifold is pumped through the tubing and the breathing port, which drives the fuel into the engine combustion chamber for combustion, and the gasoline is not wasted.

Solenoid-controlled flaps can recycle fuel, and as long as the activated carbon can still absorb the fuel, there is no need to worry - the question is whether the activated carbon will age or deteriorate, after all, it seems that the performance of everything will deteriorate after a long time. However, activated carbon does not have this problem, and the activated carbon in the carbon canister is a cycle of "filling" and then "emptying", which is different from the activated carbon used in the car or at home to adsorb substances such as HCO and TVOC.

The pore size of activated carbon is 2-50 nanometers, and volatile substances in the air can be adsorbed through activated carbon; After the microporous adsorption is full, it cannot be continuously adsorbed, and it requires a high temperature and pressure to desorb the adsorbed substance, so these activated carbons are disposable. However, the speed and degree of gasoline volatilization are exaggerated, and if the activated carbon used is also "disposable", I am afraid that it will have to be replaced every day, which is obviously unrealistic.

In summary, the activated carbon in the carbon canister requires high-efficiency adsorption and desorption, and the pressure required for desorption can be achieved through the negative pressure of the breathing port; At the same time, gasoline itself is a volatile substance, and it still has this characteristic after being adsorbed by activated carbon, so it is not difficult to desorb it through negative pressure air flow during volatilization. Therefore, after starting the engine, the carbon canister can be effectively "cleaned", and the carbon canister can be used repeatedly.

Because the canister has a very long service life and can be used forever if it is not broken, it does not need to be replaced.

As long as it does not affect the normal driving, it does not need to be replaced, this part is usually not seriously damaged, it is not a consumable, it is mainly to prevent the contamination of fuel from directly entering the atmosphere, and then take a kind of emission treatment measures, which are generally replaced once a year.

The reason why there is such a statement is because for the car's carbon canister, its failure rate is generally very low, so it does not need to be replaced.

Clogged car canisters can be caused by inhaling dust, or it can be caused by broken pipes. When there is a problem with the carbon canister, it is recommended to replace it directly and replace it with the solenoid valve.

The function of the carbon canister is to store gasoline vapor after the vehicle is turned off, the purpose is to avoid the volatilization of these gasoline vapors into the atmosphere, causing pollution to the environment and fuel loss to car owners. Since gasoline is highly volatile and volatile gasoline vapors can also be burned, it is natural that these gasoline vapors should not be wasted.

Stop the car after driving for a certain distance, keep the engine running, and then poke the fuel nozzle cap with your hand, if there is an inhalation sound, it means that the canister is blocked. In addition to this, when the canister is clogged, the car will have a significant gasoline smell. If the car is left outdoors for a long time, a large dose of gas will be sprayed out after opening the car fuel tank cap, which means that the car's carbon canister is blocked.

If it is a hot day, when the carbon tank is blocked, the oil and gas in the car fuel tank are easy to expand, if it can not be discharged immediately, it will be stored in the car fuel tank or oil circuit, which will cause the phenomenon of oil road gas resistance. Moreover, when the carbon canister is blocked, the pipeline leading to the car fuel tank is blocked, and the car fuel tank will be bulging, which is easy to affect the normal operation of the engine, which needs to be noted. Of course, when you notice that the canister is clogged, you should remove or replace it immediately.

The carbon canister is easy to absorb ash and cause blockage, you can add mushroom head dustproof, if the dust blocks the return air of the carbon canister, you can blow the return air off clean. If the canister is damaged or damaged by gasoline, it needs to be replaced. Most of the carbon canisters have problems, and it is more recommended to replace them directly, with solenoid valve replacement.