What is the phenomenon of white smoke and blue smoke emitted from diesel engines?

The blue smoke from the engine is basically burning the engine oil, and there are many reasons for this, roughly the following situations:

1. If the back pressure of the oil return oil circuit of the supercharger is too high, check whether the supercharger is leaking and whether the oil return pipe is blocked.

2. The exhaust gas valve is damaged, and the oil and gas cannot be separated, and it re-enters the combustion chamber for combustion.

3. The valve oil seal is aged, damaged or damaged, and the gap between the valve and the guide is too large.

Fourth, the oil exceeds the upper limit, so that the crankshaft throws the oil into the combustion chamber to participate in the combustion during high-speed operation.

5. The engine is severely worn, resulting in too large a gap between the piston and the cylinder wall, and the oil enters the combustion chamber through the gap.

Sixth, the piston ring is stuck, and the cylinder wall oil participates in the combustion. This is the reason why most cars burn engine oil.

The solution to burning engine oil.

Dismantling the engine for overhaul will destroy the airtightness and precision of the engine. And there is a possibility that the engine oil will burn again after tens of thousands of kilometers, so overhauling the engine is not sustainable.

With the progress of science and technology, the current dismantle-free repair technology has been very mature and has gradually been recognized and accepted by the majority of car owners. It not only saves the cost of car maintenance, but also protects the original car accessories. With exclusive patented technology, the company has universal non-destructive repair technology, which repairs and releases piston ring stuck oil while driving, and the effect is remarkable.

The white smoke emitted from the engine is generally incomplete combustion, and there will be a lack of power.

Blue smoke is to burn the engine oil, and there will be power**, but it will not last long.

White smoke, caused by water vapor.

Hope it helps.

Hello, diesel cars emit white smoke and blue smoke for the following reasons:

1. Causes of black smoke:

1.The flammable mixture is too thick. 2.

There is too much oil in the engine fuel. 3.Poor piston ring or crankshaft oil seal sealing.

4.There is moisture in the fuel. 5.

Bad spark plugs. 6.The air filter is too dirty.

2. Fault diagnosis and troubleshooting

1.For the inspection and diagnosis of excessive concentration of combustible mixtures, the carburetor and air filter should be checked. 2.

The blend does not compare with the blend of the oil, or the wrong grade of oil is used. If the oil mixture contains too much oil or the oil quality is poor, the oil of the flammable mixture cannot be completely burned, resulting in black smoke. The above phenomenon can also occur in two-stroke engines with separate lubrication and oil pump misalignment and excessive oil supply.

At this time, the oil pump should be checked and adjusted according to the regulations to ensure that the lubricating oil is supplied proportionally at different throttle openings. 3.Excessive wear or breakage in a four-stroke engine, as well as too much oil in the crankcase, can cause oil to string into the combustion chamber and cause excessive oil in the mixture.

If the crankshaft oil seal of a two-stroke engine is broken, it will also cause the oil from the transmission to string into the crankcase and enter the combustion chamber with the mixture. 4.One of the reasons for the mixing of water in the fuel is that the fuel in the fuel tank itself contains water, so the fuel tank should be cleaned and the fuel should be replaced.

Another reason is that the cylinder gasket of the water-cooled engine is broken, and cold water enters the cylinder. If, in the absence of leakage, the water in the tank is consumed too quickly, and the exhaust smoke from the exhaust pipe is slightly white, this is mostly the reason and the head gasket should be replaced.

Black smoke from gasoline engines is rare, black smoke is mainly not completely burned fuel in the combustion chamber, in the case of high temperature and lack of oxygen, diesel can not be completely and fully combusted, so decomposition and aggregation to form soot, it is a small diameter of the aggregate.

Because this aggregate reacts much slower than gasified fuel, due to the high temperature and anoxic environment of the combustion chamber, it cannot be fully burned again and is discharged through the exhaust pipe, so black smoke is presented.

The direct consequence of this phenomenon is that the fuel consumption of diesel engines is very high, the power is reduced, and at the same time, a large amount of carbon deposits exist in the piston and piston ring valves. In severe cases, the piston rings will be jammed, the valve seal is not tight, and the air leakage will be accelerated, and at the same time, it will also accelerate the wear of parts, thereby reducing the service life of the engine, so this aspect should be paid special attention.

Hope it helps!

Hello, I found an article that you can take a look at. The reasons and elimination methods are very detailed. If you are satisfied, thank you.

Know. Diesel engine.

What is the problem with blue and white smoke?

Common causes: 1. If the engine temperature is too low, the diesel fuel will become oil vapor before it is burned, which will be discharged from the exhaust pipe with the exhaust gas and emit white smoke.

2. There is water in the oil supply system, and the fuel oil refers to the water in the combustion chamber, and the water is heated into water vapor by the heat released by combustion in the cylinder.

White smoke is formed when it is discharged from the exhaust pipe.

3. The injection time is too lateDue to the late injection time, the temperature of the cylinder has dropped during the fuel injection, and some diesel fuel has not been burned into oil vapor and white smoke.

4. Poor atomization of the fuel injector leads to incomplete combustion of diesel fuel, and the high-temperature exhaust gas discharged from the normal cylinder merges in the exhaust pipe, resulting in white smoke.

5. If the cylinder pressure is too low, the diesel will turn into oil vapor without combustion.

White smoke workaround:

1. A large amount of white smoke comes out of the rear exhaust pipe of the engine when the cold car is just started, but the fault disappears with the increase of engine temperature after running for a period of time.

2 diesel engine work weak, white smoke can be close to the exhaust pipe, when the white smoke swept over the hand surface of the water droplets, it means that the cylinder has water in, at this time can be used to find out the leaking cylinder by the single-cylinder oil cut method.

3. When the diesel engine emits white smoke, the working temperature of the engine can be increased, such as when the water temperature is about 70, the exhaust smoke color changes from white smoke to black smoke, it can be judged that the injector is poorly atomized, and the injector can be found out by the method of oil dripping and oil dripping by cylinder, and then the injector is verified.

4. The diesel engine emits white smoke when it is just started, and it becomes black smoke after the temperature rises, which indicates that the cylinder pressure is insufficient and the cylinder pressure needs to be adjusted.

5. When the diesel engine is running at high speed, the work is uneven, the acceleration is not sensitive, the temperature is too high, the work is weak, and the exhaust pipe emits gray-white smoke, which indicates that the fuel injection time is too late, and the fastening of the fixing screws of the connecting plate and the key and keyway should be checked and adjusted, and the fuel injection time should be slowly advanced.

Blue smoke from the engine indicates organic oil in the cylinder, and these oils are discharged as blue smoke at low temperatures and low loads. At high temperatures and high loads, dark gray smoke is discharged.

Reasons: 1. The oil level in the oil bottom is too high.

2. The oil level of the air filter is too high.

3. Piston ring failure.

4. The catheter fit is loose.

5. The cylinder is worn and the piston ring is loose.

6. Twisted rings and conical rings are reversed.

Introduction Diesel engines are engines that burn diesel fuel to obtain energy release. It was developed by the German inventor Rudolf Diesel

Diesel was invented in 1892, and in honor of the inventor, diesel is represented by his surname Diesel, and diesel engines are also known as Diesel engines

engine)。

Summary. Like this case in the morning cold car, if there is blue smoke, first of all, there are two possibilities, the first is the valve seal itself here sometimes the problem caused by poor sealing, resulting in oil flowing into the combustion chamber, its sealing is caused by problems, the second is that there may be an oil leakage inside the turbocharger, resulting in such a problem, so the main thing is to check the turbocharger, check the valve oil seal, to see if it is normal.

Dear, this question is up to me, it takes a little time to type, please be patient, thank you!

Like this case in the morning cold car, if there is blue smoke, first of all, there are two possibilities, the first is its own gas type reputation valve oil seal here sometimes the problem caused by poor sealing, resulting in oil flow into the combustion chamber, its sealing is caused by problems, the second is that there may be an oil leakage inside the turbocharger, resulting in such a problem, so the main check the turbo, check the valve oil seal this sock, to see if it is normal.

In general, there are the following reasons:

1. The fuel injection time is too late, due to the late fuel injection time, the cylinder temperature has dropped during the fuel injection, and part of the diesel fuel has not been burned into oil vapor, emitting white smoke;

2. Poor atomization of the fuel injector leads to incomplete combustion of diesel fuel, and the high-temperature exhaust gas discharged from the normal cylinder merges in the exhaust pipe, resulting in white smoke;

3. The cylinder pressure is too low, and the valve, piston ring, and cylinder liner are worn, which will cause insufficient compression pressure, and some diesel fuel will become oil vapor without combustion, so white smoke will be emitted from the exhaust pipe.

Fault diagnosis and troubleshooting: the diesel engine emits white smoke when it is just started, and it becomes black smoke when the temperature rises. This indicates that the cylinder pressure is insufficient, although this pressure can maintain the diesel engine starting, but when starting, due to the low temperature, part of the diesel fuel will volatilize into steam without combustion.

Check the tightness of valve closing, the phase of air valve, whether the gasket of the cylinder gasket or fuel injection seat hole is leaking, whether the cylinder wear is too large, whether the piston ring is stuck or whether its opening is overlapping, etc., and then solve the problem.

What are the causes of white smoke from diesel engine exhaust.

There are 5 reasons why a diesel engine emits white smoke.

1. The engine temperature is too low. Some diesel fuel turns into oil vapor when it is not burned, and is discharged from the exhaust pipe with the exhaust gas, emitting white smoke.

2. There is water in the oil supply system. There is water in the fuel or combustion chamber, and the water is heated into water vapor by the heat released by combustion in the cylinder, which is discharged from the exhaust pipe to form white smoke.

3. The injection time is too late. Due to the late injection time, the temperature of the cylinder has dropped during the fuel injection, and part of the diesel fuel has not been burned into oil vapor, emitting white smoke.

4. Poor atomization of fuel injectors. Poor atomization leads to incomplete combustion of diesel, and the high-temperature exhaust gas discharged from the normal working cylinder merges in the exhaust pipe, resulting in white smoke.

5. The cylinder pressure is too low. Some diesel fuel turns into oil vapor without combustion, so white smoke is emitted from the exhaust pipe.

Troubleshooting and Troubleshooting:

1. When the cold car is just started in winter, a lot of white smoke comes out of the rear exhaust pipe of the engine. However, after running for a period of time, as the engine temperature rises, the white smoke gradually disappears, and then normal, it means that the engine temperature is too low and there is no need to exclude.

2. The diesel engine is weak and emits white smoke. You can put your hand close to the exhaust pipe, when the white smoke passes over the hand surface and there are water droplets, it means that there is water in the cylinder, at this time, you can use the single-cylinder oil cut-off method to find out the leaking cylinder. If the speed of the diesel engine is affected when the oil is cut off in a single cylinder, it means that the cylinder is working well, otherwise the cylinder is not working, and the injector should be removed to check whether there are water traces on the nozzle.

If water is found, check the cause of the water ingress to find out whether the cylinder is ruptured or the cylinder gasket is broken. If the condition of each cylinder is the same and it is still unable to emit white smoke, it should be checked whether there is water in the diesel oil. At this time, the drain plug of the fuel tank and fuel filter can be opened to check whether there is water in the fuel.

3. When the diesel engine emits white smoke, the working temperature of the engine can be increased, such as when the water temperature is about 70, the exhaust smoke color changes from white smoke to black smoke, it can be judged that the injector atomization is poor and dripping. Find out the faulty injector with the method of cylinder by cylinder oil cut-off, and then check the injector; If there is oil dripping during the injection, it should be further checked.

What are the causes of white smoke from diesel engine exhaust.