What s going on with the white smoke coming out of the exhaust of the 100kw Weichai generator set?

When the engine temperature is normal and the exhaust pipe temperature is also normal, white smoke is still discharged, indicating that the engine is not working properly, and the cause of the fault and the treatment methods are as follows

1. The fuel quality is unqualified, containing too much water, and qualified diesel is selected.

2. The fuel system is mainly for water to enter the fuel tank and remove the water in the fuel tank.

3. If the cylinder gasket is damaged, or the cylinder liner is leaking, the cylinder gasket and cylinder liner should be inspected and repaired or replaced.

4. The pressure of the fuel injection pump is too low, and the failure of the fuel injector is caused by poor atomization of fuel in the combustion chamber and poor formation of combustible mixture.

5. If the injector is working poorly and the injector is dripping, the injector should be inspected and repaired or replaced.

Weichai generator set emits white smoke, which may be caused by the following reasons:

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.

**The quality of Weichai generator sets is generally high, and Weichai's after-sales service is also very in place, and the national warranty has been realized, and you can directly contact Weichai to let Weichai after-sales personnel deal with it.

I would like to introduce you to the white smoke fault diagnosis and troubleshooting methods of diesel generator sets, I hope it can help you!!

1. When the chiller starts in winter, a large amount of white smoke is emitted from the exhaust of the diesel generator set. However, after a period of operation, as the temperature of the diesel engine increases, the white smoke gradually disappears, and then normal, it means that the temperature of the diesel engine 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, and the cylinder can be found to leak by using the single-cylinder oil cutting method. 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 it means that 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 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, it is still weak and emitting white smoke, then you should check whether there is water in the diesel.

At this point, the blowdown plugs of the fuel tank and fuel filter can be opened to check for water in the fuel.

3. When the diesel engine emits white smoke, the working temperature of the diesel engine can be increased, such as when the water temperature is about 70 degrees, the exhaust smoke color changes from white smoke to black smoke, it can be judged that the injector atomization is poor and dripping. Use the cylinder-by-cylinder oil cut-off method to find out the faulty injector, and then check the injector; If there is oil dripping during oil injection, it should be further checked whether it is caused by too low pressure or due to deformation or wear of the needle valve body, so as to improve.

4. When the diesel engine is just started, due to the low temperature, part of the diesel fuel will volatilize into steam before combustion. Check the tightness of the valve closing, the phase of the valve, whether the gasket of the cylinder gasket or the seat hole of the injector 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 symptoms.

5. When the diesel machine is running at high speed, the degree is uneven, the acceleration is not sensitive, the temperature is too high, the work is weak, and the exhaust emits gray-white smoke. This indicates that the fuel injection time is too late, and the fastening of the fixing screws of the connecting disc and the key and keyway should be checked and adjusted, and the fuel injection time should be slowly advanced so that the white smoke can be eliminated and the diesel engine will run normally; If there is no improvement after adjustment, check whether the timing adjustment screws of the plungers of each cylinder of the fuel injection pump are out of balance and take measures.

Yuchai generator emits white smoke.

Cause: Indicates that the atomized diesel injected into the cylinder was discharged before it was completely combusted. There are three kinds of white smoke caused by the generator: first, the fuel injector is stuck, the pressure is insufficient, and the diesel atomization is poor; Second, there is more air in the oil circuit and water in the diesel; The third is that the oil supply is too late.

Exclusion method: check the fuel injector, adjust or replace the fuel injector; 2. Check the oil circuit, remove the air in the oil circuit, and use standard diesel; Third, adjust the advance angle of oil supply, which is the same as the adjustment method when black smoke is emitted.

The white smoke of the diesel engine indicates that water has entered the combustion chamber, which is caused by several reasons, first: the cylinder gasket is broken, and the water in the waterway enters the cylinder. Second:

There is a crack in the cylinder liner, and water enters the cylinder through the crack. Third: the water-blocking ring of the cylinder liner is aging and loses its sealing effect.

Fourth: there is water in the diesel, and the oil-water separator does not discharge water according to the regulations.

The cause of white smoke emitted by diesel generator set should first be found, and then the fault should be eliminated according to the reason.

1. The diesel engine is weak and smokeless. 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, the cause of water ingress should be checked 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 for water in the diesel.

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.

2. 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. Use the method of cylinder-by-cylinder oil cut-off to find out the faulty injector, and then check the injector; If there is oil dripping during oil injection, it should be further checked whether it is caused by too low injection pressure or due to deformation or even excessive wear of the needle valve body, so as to improve.

3. When the diesel engine is just started, it emits white smoke and 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.

Another item is that if the diesel generator set is cold in winter, a lot of white smoke comes out of the rear exhaust pipe of the engine when the car is just started. However, after running for a period of time, as the engine temperature increases, the white smoke gradually disappears, and then normal, it means that the engine temperature is too low and there is no need to remove it.

The main reasons for the failure of the 300kw generator are as follows:

1. The air circulation in the engine room where the diesel generator set is installed is not good, and the fuel is burned in the combustion chamber with insufficient air, and the carbon smoke is decomposed and polymerized into ink crystals, which is black with the exhaust gas discharge;

2. The injector injection chamber is ruptured, remove the injector and the injector chamber after the rupture is found, replace the ruptured injector chamber, and adjust the injector;

3. When the exhaust back pressure of the diesel generator set is too high, check and correct the exhaust back pressure in the case of load;

4. The fuel injection hole of the injector of the diesel generator set is blocked, if it is found to be blocked, the injector and the fuel injection chamber need to be cleaned, replaced and readjusted;

5. Excessive dust accumulation in the filter element of diesel generator set filter; Mufflers are rusted, charred or oily. The intake and exhaust valve clearance is too large, which reduces the valve opening and loosens, wears and deforms the parts of the matching mechanism, changes the relative position of the camshaft gear and the crankshaft timing gear, and the valve opening and closing time is incorrect;

6. The valve is seriously sagging, the gap between the piston and the piston pin, the piston pin and the connecting rod small head, and the connecting rod big head and the connecting rod journal are too large, so that the combustion chamber volume increases and the compression ratio decreases when the diesel generator set is running;

7. The valve clearance is too small, and the diesel generator set is easy to be jacked open when it is running, or the cylinder is not tightly sealed due to valve ablation and carbon deposit;

8. The cylinder barrel and piston ring are worn too much, and the piston ring is installed incorrectly or loses elasticity, resulting in the cylinder leakage of the diesel generator set;

9. Long-term high-speed operation, the internal temperature of the diesel generator set is too high or deflagration occurs.

1. White smoke from the exhaust pipe: It means that the injector has poor atomization or dripping oil makes part of the gasoline not burn; There is water in gasoline; The cylinder head and cylinder liner have cracks that are invisible to the naked eye, and the cylinder gasket is damaged so that water enters the cylinder; The temperature is too low.

It can be solved by the following methods: cleaning or replacing the injector, adjusting the injection pressure; Remove moisture from the tank and oil circuit; Do not buy low-cost and low-quality oil; Replace the cylinder head gasket, cylinder liner, cylinder head.

Fault Symptom:

1. The engine power is insufficient, the operation is uneven, and a large amount of white smoke comes out of the exhaust pipe (1), the cause of the failure 1. The oil supply time is too late.

2. There is water in the diesel fuel or water inlet into the cylinder due to the cylinder gasket burning through, cylinder rupture and leakage 3. The cylinder temperature is too low or the cylinder compression pressure is insufficient 4. The spray quality of the injector is not good.

2) Fault diagnosis and elimination method: white smoke from diesel engine exhaust is divided into two types: gray white smoke and water vapor white smoke.

1. First check the engine temperature, if the temperature is too low, you should check whether the cooling intensity adjustment device, such as thermostat, shutter and insulation quilt is normal. In winter, the diesel engine often emits white smoke after cold starting, but when the engine temperature is normal, the white smoke can disappear on its own, which is a normal phenomenon.

2. If the engine temperature is normal, when the exhaust pipe drains steam smoke, put your hand close to the exhaust port, when the white smoke passes by, and there are water droplets on the hand surface, you should check whether there is water in the diesel fuel or the cylinder gasket burns through, the cylinder is ruptured and leaking, etc.

3. The engine power is insufficient, and the exhaust pipe emits gray and white smoke, which is generally too late for the oil supply time, and the oil supply time should be checked and adjusted.

4. Check the spray quality of the injector, first use the method of single-cylinder oil cut-off to find out the cylinder that works poorly. Remove the injector and connect it to the original high-pressure oil pipe outside the cylinder, start the diesel engine to run, and observe the spray quality. If the spray quality is not good, the injector should be checked and adjusted, and the injector should be replaced if necessary.

5. If the engine emits white smoke when it just starts, and black smoke emits after the temperature rises, it is usually caused by the cylinder pressure being too low.