What are the cleaning methods of engine carbon deposit?

We often forget to clean the engine of the car. In fact, it will be very dangerous if we don't clean it up. Do you know how to clean it? The following is the cleaning method of engine carbon deposit that I sorted out for you, hoping to help you.

Cleaning method of engine carbon deposit

I. Disintegration and cleaning

Advantages: clean and thorough!

Disadvantages: It is often difficult to achieve the assembly accuracy of the original factory. Even if all the load-bearing fastening parts such as bolts and gaskets are replaced, it will have a certain impact on the engine efficiency.

Suggestion: Unless the carbon deposit is very serious and cannot be solved by other means, the engine will have to be disassembled to solve it. In addition, choose carefully!

Second, the infusion bag or bottle cleaning

At present, the most commonly used disassembly-free cleaning method is similar to human intravenous drip, so this cleaning method is named, which is also commonly known as "intravenous drip" and "infusion bottle"

Advantages: convenient and quick, and obvious cleaning effect on the oil nozzle. For new cars, the cleaning effect of Didi can generally reach about 80%, and the effect of classic cars is slightly worse, but the effect on power and fuel consumption is still obvious after washing.

Disadvantages:

1, bottle washing requires equipment, workstations and working hours, all of which are expensive.

2. Washing bottles usually takes one hour to complete, which takes time to wait and takes up the owner's precious time.

3. It is not easy to clean up the carbon deposits in parts like the intake manifold by "dripping".

4. There will be a large amount of carbon deposit in the fuel nozzle, combustion chamber and throttle of the engine. Removing so much carbon in one hour will inevitably cause large particles to fall off, which may cause damage to the nozzle and cylinder block, and may also cause three-way catalytic blockage. If the three-way catalytic converter is not cleaned in time, the exhaust system of the engine will be affected, and there may be hidden dangers in the car.

Third, the fuel system cleaning agent directly refuels the tank.

Advantages: The method is simple and easy to operate. Just add a proper amount of additives and gasoline to the fuel tank, and give the car protection "heart" and clean "intestines" anytime and anywhere, which can not only remove carbon deposits, but also improve oil products and prevent carbon deposits and gum formation.

Disadvantages: At present, the quality of fuel additives is uneven, and the fishy eye is mixed. Some have no effect at all, and some contain metal components, which are harmful to cars.

principle ofinternal combustion engine

Intake stroke

The working medium entering the cylinder is pure air. Due to the small resistance of diesel engine intake system, the intake terminal pressure pa= 0.85~0.95p0, which is higher than that of gasoline engine. The final intake temperature ta = 300 ~ 340 k, which is lower than that of gasoline engine.

Compression stroke

Because the compressed working medium is pure air, the compression ratio of diesel engine is generally higher than that of gasoline engine ε = 16 ~ 22. The compression end point pressure is 3000～5000 kpa, and the compression end point temperature is 750 ~1000 k, which is much higher than the auto-ignition temperature of diesel oil by about 520K k. ..

Power stroke

When the compression stroke draws to a close, diesel oil is injected into the cylinder combustion chamber at a high pressure of about 10MPa under the action of a high-pressure oil pump, and it is ignited immediately after being mixed with air in a short time. The gas pressure in the gas cylinder rises rapidly, the highest can reach 5000～9000 kpa, and the highest temperature is 65438±0800～2000K K. Because the diesel engine ignites itself by compression, it is called compression ignition engine.

exhaust stroke

The exhaust of diesel engine is basically the same as that of gasoline engine, but the exhaust temperature is lower than that of gasoline engine. Generally, TR = 700 ~ 900 K. For a single-cylinder engine, its speed is uneven, the engine works unsteadily and vibrates greatly. This is because only one of the four strokes does work, and the other three strokes consume power to prepare for work. In order to solve this problem, the flywheel must have enough moment of inertia, which will lead to the increase of the mass and size of the whole engine. Using multi-cylinder engine can make up for the above shortcomings. Modern cars mostly use four-cylinder, six-cylinder and eight-cylinder engines.

Maintenance method of automobile engine

1, use good quality engine oil.

Engine oil, that is, engine lubricating oil, can lubricate, clean, cool, seal and reduce wear and tear on the engine. Only by using qualified lubricating oil can the wear of engine parts be reduced and the service life be prolonged. Therefore, we should pay attention to adding good quality engine oil at ordinary times, do not shoddy it, and do not let the engine run out of oil.

2. Use qualified coolant antifreeze.

It is very important that the automobile engine needs to rely on the water tank to cool down, otherwise the engine will easily "boil" and cause fatal damage to the engine. Therefore, it is usually necessary to keep the coolant in the water tank at a normal level, and choose a good quality coolant, especially in winter, and choose a suitable coolant according to the ambient temperature. In the normal automobile maintenance project, the engine antifreeze needs to be replaced every year.

3. Regularly clean the water tank scale.

Rusting and scaling of engine water tank are easy problems. Rust and scale will limit the flow of coolant in the cooling system, reduce heat dissipation, lead to overheating of the engine and even cause engine damage. Therefore, in daily maintenance, we should choose the appropriate coolant ratio according to the specific situation. Moreover, when adding coolant, it can reach between the maximum value and the minimum value.

4. Regularly remove the "carbon deposit" on the car.

In the process of burning oil, it is inevitable that there will be carbon deposition. Excessive carbon deposition will lead to abnormal phenomena such as difficult start-up, unstable idle speed, poor acceleration, sudden refueling and tempering, excessive exhaust volume and increased fuel consumption. There are many adverse effects on the engine, so we should pay attention to prevent carbon deposition, drive at high speed as far as possible, increase the speed appropriately when shifting gears, avoid idling for a long time, and use clean gasoline. And maintain good driving habits to reduce carbon deposition. If there is a lot of carbon deposit, you should go to the repair shop to remove the carbon deposit.

5, change the car "three filters" on time.

Three filters refer to air filters, oil filters and gasoline filters. The three filters play a role in filtering air, engine oil and gasoline on the automobile engine, thus protecting the engine and improving its working efficiency. Therefore, in order to keep the engine in the best condition, it is necessary to replace the filter element in time, or replace the filter element when it is dirty.

6, keep a reasonable speed

When the car is running normally, a reasonable speed can make the engine run normally. However, if it runs at low speed or high speed for a long time, the engine will be overloaded, which will not only consume more fuel, but also easily hurt the engine. Therefore, when driving normally, the speed should be well matched with the gear, and the accelerator should be lightly stepped on, not slammed.