How to maintain a single cylinder diesel engine with heavy load white smoke

White smoke from the exhaust pipe of the diesel engine. The occurrence of this phenomenon indicates that some diesel fuel is too low in temperature, diesel atomization is poor, and the unburned part is discharged from the exhaust pipe. The main reasons are:

The injection time is too late, there is dripping leakage when the injector is injected, the injection pressure is too low, the atomization is poor, the temperature of the diesel engine is low, and the diesel fuel injected into the cylinder is neither burned nor carbonized, and it is white with the exhaust gas discharge. In addition, the quality of diesel is too poor, the diesel contains water, the cylinder head, cylinder block, cylinder liner has cracks or the cylinder gasket is deformed and broken, resulting in the cooling water in the water jacket into the combustion chamber, which will also make the diesel engine exhaust pipe emit white smoke. The difference between the two is that the white smoke emitted by the former has an oily smell, while the white smoke emitted by the latter has a light or no oily smell.

The reason for the white smoke exhaust of the diesel engine is generally the result of the diesel vapor not igniting and burning or the water in the diesel. When the diesel fuel in the cylinder fails to burn after atomization and evaporation, the evaporated fuel oil forms milky white smoke; Water vapor is white; When the combustion in the cylinder is poor, some fuel vapors fail to burn and another part of the fuel vapors are incompletely combusted, and the exhaust gas is white. The main reasons for diesel engine white smoke are as follows.

There is water in the diesel fuel, or water ingress into the cylinder due to ablation of the cylinder liner, rupture and leakage of the cylinder liner. The cylinder operating temperature is too low or the cylinder compression pressure is insufficient. The injector spray quality is not good, or the injector nozzle model does not match.

Insufficient oil supply time. The diesel fuel is of poor quality or the selected grade does not meet the requirements.

In the morning of winter, the diesel engine often emits white smoke after cold starting, but when the engine heats up, the white smoke can disappear on its own, which is a normal phenomenon and does not belong to failure.

The cylinder head gasket should be replaced.

Insufficient oil supply: If the amount of oil in the cylinder is small, the heat generated by combustion will be reduced, which will not meet the needs of the engine load, resulting in the engine being weak, making the combustion insufficient and emitting black smoke.

Too little air intake: The engine is not fully charged, resulting in the carbon atoms in the fuel can not fully react with the oxygen atoms, so the heat released is reduced, the engine is weak, and the combustion is not sufficient, resulting in black smoke.

Clogged air intake pipe or clogged air filter. The air inlet is blocked for some reason, or the air filter is blocked due to the working environment and road conditions.

Solution. 1. The installation position of the air filter and the arrangement of the exhaust pipe must avoid the hot air exhaust port of the diesel engine to avoid the influence of the thermal radiation of the diesel engine on the intake air.

2. Clean the air filter.

3. Check whether each sealing ring is complete and intact; Whether all flange screws are tightened and whether there is damage to the flange; When the exhaust header is not sealed, check the alignment of the cylinder head and the straightness of the exhaust header.

4. Use the oil supply advance angle checker to detect the adjustment of the oil supply advance angle, if there is an irregular situation, it may be that the injector advance adjustment spring is broken, the spring support plate is worn, and the counterweight is stuck, which must be replaced or repaired.

Black smoke from diesel engines is caused by abnormal combustion or incomplete combustion. Because when the amount of air charged in the diesel engine is insufficient, that is, when the excess air coefficient is low, the fuel cannot be completely combusted, so that enough energy cannot be produced, and the incompletely burned fuel may precipitate C and CH, thus forming black smoke. Cause Analysis:

1. The air inlet pipe is blocked or the air filter is blocked due to some reason, or the air filter is blocked due to the poor working environment and road conditions.

2. The ignition timing is not right or the fuel injection timing is not the same as the early ignition caused by the gasoline engine due to long-term operation. Diesel engines are caused by late injection time.

3. Improper adjustment of the oil pressure of the injector or fuel injection pump.

4. The cylinder pressure is insufficient, measure the cylinder pressure, the cylinder pressure of gasoline vehicles is 3-4MPa, and the fuel injection pressure of diesel vehicles is 16-20MPa.

Common causes of failure are:

1. The fixing bolt of the coupling of the fuel injection pump drive joint is loose or the fuel injection timing is adjusted too early;

2. Fuel injection pump failure, that is, the plunger, tappet or cam of the fuel injection pump is seriously worn, or it may be that the plunger tappet adjustment screw is loose;

3. Injector failure, that is, the injector needle valve can not be closed when it is sticky, the needle valve is in poor contact with the valve seat or leaks, and the injection pressure spring adjustment screw is loose;

4. In the case of wear of the plunger pair of the fuel injection pump, the adjuster is improperly adjusted and the oil supply is too large;

5. The cylinder pressure is too low;

6. The air filter or air intake channel is blocked.

Adjust the injection time first, isn't it a little late;

Check the cylinder pressure, if it is too low, first see if the valve is not closed tightly (the gap is small) adjustment;

Oil supply system, the atomization of the nozzle is not good, calibrate it, if it is not possible to calibrate the high-pressure pump, the plunger may wear too much;

Detect the cylinder pressure, if it is too low, or the cylinder wall clearance is changed to four matching.

The fault of white smoke from the single-cylinder diesel engine is that the fuel injection time of the high-pressure oil pump is delayed, and the fuel supply advance angle needs to be adjusted. The specific operation method is as follows:

Remove the high-pressure oil pump and take out one page of the oil pump installation mat mat (increasing or decreasing the high-pressure oil pump installation mat is to adjust the oil supply advance angle, reducing the cushion is to increase the oil supply advance angle, and adding the cushion is to reduce the oil supply advance angle. Then install a high-pressure oil pump to try, if there is still white smoke, take out a page of mat until there is no white smoke and adjust it (too much is not desirable at a time, too much is obtained, resulting in too large a fuel supply advance angle, and the engine is easy to reverse when starting, which is very dangerous!!) ）

1. Diesel contains water, 2. The atomization of the oil head is not good, and the oil head, plunger and outlet valve need to be replaced. 3. The air intake of the air filter is not smooth. 4. The valve clearance is wrong. 5. The oil supply time is wrong.

Summary. White smoke from a single-cylinder diesel engine may be due to incomplete combustion or a problem with the fuel injection system. You can try the following solutions:

1.Check the fuel supply system to make sure the fuel filter is clean and the fuel pump is working properly. 2.

Check whether the injector is working properly, check whether there is any blockage or damage, and need to replace or clean it in time. 3.If there is no problem with the fuel supply, it may be caused by incomplete combustion.

You can check whether the cylinder pressure is normal, or adjust the amount of fuel injected from the injector. 4.Choose the right fuel quality correctly and avoid using inferior fuel.

5.If the problem is still not solved, it is recommended to consult a professional diesel engine maintenance technician for inspection and repair.

White smoke from a single-cylinder diesel engine may be due to incomplete combustion or a problem with the fuel injection system. You can try the following solutions:1

Check the fuel supply system to make sure the fuel filter is clean and the fuel pump is working properly. 2.Check whether the injector is working properly, check whether there is any blockage or damage, and need to replace or clean it in time.

3.If there is no problem with the fuel supply, it may be caused by incomplete combustion. You can check whether the cylinder pressure is normal, or adjust the amount of fuel injected into the high nozzle.

4.Choose the right fuel quality correctly and avoid using inferior fuel. 5.

If the problem is still not solved, it is recommended to ask a professional diesel maintenance technician for inspection and maintenance.

Excuse me, but please go into more detail?

White smoke from a single-cylinder diesel engine can be a problem with incomplete combustion or fuel injection system. The Shouno solution includes:1

Check the fuel supply system to make sure the filters and pumps are working properly. 2.Check whether the injector is clogged or damaged, and it needs to be replaced or cleaned.

3.Check the cylinder pressure and fuel injection volume, and adjust it to be appropriate. 4.

Choose the right fuel quality. 5.If the problem is not resolved, please consult a professional service technician.

The reasons for white smoke from single-cylinder diesel engines are as follows:

1. White smoke from a cold car is a normal phenomenon, which is caused by diesel evaporation and incomplete combustion;

2. White smoke is emitted from the hot car, which may be due to the large angle of oil supply in advance (in advance); This phenomenon is easy to reverse the thug when it starts, and the exhaust smoke has a serious diesel smell;

3. There is cavitation in the cylinder liner or cylinder head, there are small holes or cracks like pinholes, the cooling water enters the cylinder, and the water evaporates out, and the flue gas is the taste of water evaporation.