What is the matter with the blue smoke emitted by the load of the National V Xichai 460 engine

Burn the engine oil, and the oil is strung into the combustion chamber.

Blue smoke is a condition of burning engine oil, and the main reasons for burning engine oil are as follows:

1. Use engine oil with poor quality or viscosity grade that does not meet the requirements. In addition, too low or too high oil viscosity can lead to poor engine lubrication, increased wear of piston rings and cylinder walls, and reduced sealing performance, resulting in oil burning.

2. The matching gap between the piston ring and the cylinder wall is too large, the piston ring is improperly installed or the sealing is poor, and the oil on the cylinder wall enters the combustion chamber, causing the phenomenon of burning the engine oil; In addition, poor sealing performance of the valve seal, damage to the crankcase forced draft valve (PCV) or crankcase vent blockage can cause excessive pressure in the crankcase to cause the oil to enter the cylinder with the crankcase gas and participate in combustion.

3. Burning engine oil caused by excessive oil filling. When the oil is filled above the center line, the part of the engine lubrication process that passes through splash lubrication will be too much into the combustion chamber due to the high oil pressure.

4. Oil leakage from turbocharger. The turbocharger is mounted at the front of the exhaust pipe and operates at a very high temperature, and the turbine and pump wheels can reach 120,000 revolutions per minute when the engine is running at full load. The turbine shaft has oil-lubricated floating bearings, and the car has one oil passage to the turbocharger.

Oil leaks from pipes or bearings can allow oil to seep from the turbocharger into the exhaust pipe. When the exhaust pipe temperature is high, the oil is baked and discharged into blue smoke.

5. There is leakage in the valve oil seal, which means that the oil leaks into the combustion chamber through the valve oil seal.

The blue smoke emitted by diesel vehicles is due to the phenomenon of burning engine oil, mainly because the engine oil enters the combustion chamber for combustion, and the combustion is not completely discharged as blue smoke.

The main reasons why engine oil enters the combustion chamber of an engine:

It may be caused by the oil pan oil level is too high, the oil pan oil level is too high, and the oil is splashed along the cylinder wall by the crankshaft and the connecting rod into the combustion chamber, so the phenomenon of burning engine oil will occur.

Valve guide oil seal leakage will also cause oil to enter the combustion chamber for combustion, valve stem and duct fit gap is too large or the duct oil seal aging will cause oil to enter the combustion chamber, in serious cases, in the exhaust pipe of the car will also organic oil outflow.

If you want to confirm which valve seal is the problem, you need to remove the exhaust pipe and observe the exhaust valve.

The gap between the inner hole of the valve guide and the valve stem is too large, which will also lead to the phenomenon of burning engine oil in the car, and the serious wear of the piston ring and cylinder liner will cause the oil to flow into the combustion chamber, so the exhaust pipe of the car will emit blue smoke during the combustion process.

If the gap between the piston and the cylinder liner is too large, it needs to be replaced in time, and in addition, too long idle time at no load will also cause blue smoke from the diesel engine, in this case, low-speed no-load operation should be minimized.

Causes of blue smoke from a cold start of the engine:

1. The piston scraper ring is bonded and loses its effect;

Second, the viscosity of the engine oil is too large;

3. The lap clearance of all rings of the piston is in a straight line in the upper and lower positions;

--Solution:

1. Check the engine oil, it is recommended to change it;

2. If there is still blue smoke, check the cylinder discharge outlet, the most serious pollution is the faulty cylinder that burns engine oil, it is recommended to replace the piston ring;

Blue smoke from the engine indicates that the engine is burning oil. You can use the cylinder breaking method to find out which cylinder has a problem, generally speaking, the oil ring of the cylinder is locked or the two oil rings are matched.

Minor problems, this problem will occur in every diesel car.

Diesel engines emit blue smoke because the engine burns oil.

Maintenance method: Find a place to repair the car, replace the piston ring in the body, if you feel that the car is boring, open the body to see the four matching (cylinder barrel.

Piston piston rings.

The piston pin "the so-called piston pin is the small column in the middle of the piston") is worn, if the wear is large, it is recommended that you change the four matches.

1. The reason for the emission of blue smoke is that there is too much engine oil in the combustion chamber.

2. The reasons for this phenomenon and the methods of elimination are as follows:

1) Excessive oil pan and engine oil, too much oil will splash to the cylinder wall with the high-speed crankshaft, and into the combustion chamber. The elimination method is to stop the machine for about 10 minutes, check the oil scale, and remove the excess oil.

2) The cylinder liner and piston ring components are seriously worn, and the clearance is too large. As a result, a large amount of oil is spilled into the combustion chamber and combusted, accompanied by an increase in crankcase exhaust gases. The way to deal with it is to replace the worn parts in time.

3) The piston ring loses its function. If the piston ring is not elastic enough, it is stuck in the ring groove by carbon deposit, or the ring mouth is on the same straight line, or the oil return hole of the oil ring is blocked, it will cause the oil to enter the combustion chamber and burn, and the phenomenon of blue smoke will be discharged. The method of treatment is to remove the piston rings, remove the deposits, rearrange the ring buckles, and replace the components if necessary.

4) The gap between the valve and the duct is too large. During the air intake, a large amount of oil in the rocker chamber enters the combustion chamber and burns simply. The method of treatment is to replace the worn valves and ducts in a timely manner.

5) The reasons for the emission of blue smoke are also too thin, the oil pressure is too high, and the engine is not run in well, which will cause the oil to burn and emit blue smoke.

This is the phenomenon of engine oil burning, which may be caused by valve oil seal leakage, excessive wear of piston rings, excessive wear of cylinder liners, etc., the engine should be disassembled for maintenance, and it is recommended to go to a professional maintenance plant for maintenance.

Xichai 350 engine smoke one by one, it is recommended to check whether the car has the problem of engine oil burning, generally the blue smoke is mostly the car engine burning oil.

Summary. Dear, hello, when the diesel engine emits blue smoke, it means that the oil enters the cylinder, part of it burns off, and the rest is discharged from the exhaust pipe. This not only causes the waste of oil, but also makes the pistons, piston rings, valves, etc. easy to accumulate carbon, accelerates the wear of parts, and the reasons for serious blue smoke are:

1. Too much oil in the oil pan or leakage of the cylinder liner water-blocking ring raises the oil level, resulting in too much oil splashing on the cylinder wall, which is easy to enter the combustion chamber for combustion. It should be stopped for inspection, if there is too much oil, release a part;If it is caused by water leakage, the oil should be replaced.

2. The elasticity of the piston ring is insufficient or broken, which weakens the oil scraping effect and causes the oil channeling, and the new ring should be replaced.

3. The matching gap between the piston and the cylinder liner is too large, so that the oil splashed on the cylinder wall can easily enter the combustion chamber. It should be overhauled in time, and the cylinder liner or boring cylinder should be replaced according to the situation, and the piston and piston ring of the larger level should be replaced to make the matching clearance meet the requirements.

4. There is too much oil in the air filter. If there is too much oil in the filter disc of agricultural diesel engines with oil bath air filters, the oil can easily be carried into the combustion chamber by air due to the reduction of oil viscosity during hot driving. Therefore, the oil should be filled as prescribed.

5. The oil ring is reversed. The edge of the oil ring has a guide angle or cone, which must be assembled according to certain requirements to play the role of oil scraping. If it is installed in the opposite direction, it will lead to a decrease in the oil scraping ability, resulting in oil channeling.

What is the reason why the national four engine eats the load and emits blue smoke, the leader would like to say hello, the national four Shangchai 6114 engine has just been replaced with four matching, and the oil nozzle computer school friend is good to argue, the supercharger is not stringed oil, and the heat engine is hard to emit blue smoke. What is the situation, please.

You're so kind, wait a minute.

Dear, hello, when the diesel engine emits blue smoke, it means that the oil enters the cylinder, part of it burns off, and the rest is discharged from the exhaust pipe. This not only causes the waste of oil, but also makes the piston, piston ring, valve, etc. easy to accumulate carbon, speed up the wear of parts, and the reasons for serious blue smoke are: 1. Too much oil in the oil pan or leakage of the cylinder liner water-blocking ring raises the oil level, resulting in too much oil splashed on the cylinder wall, which is easy to enter the combustion chamber for combustion.

It should be stopped for inspection, if there is too much oil, release a part;If it is caused by water leakage, the oil should be replaced. 2. The elasticity of the piston ring is insufficient or broken, which weakens the oil scraping effect, resulting in the oil hole of the channeling machine, and the new ring should be replaced. 3. The matching gap between the piston and the cylinder liner is too large, so that the lapping oil splashed on the cylinder wall can easily enter the combustion chamber.

It should be overhauled in time, and the cylinder liner or boring cylinder should be replaced according to the situation, and the piston and piston ring of the larger level should be replaced to make the matching clearance meet the requirements. 4. There is too much oil in the air filter. If there is too much oil in the filter disc of agricultural diesel engines with oil bath air filters, the oil can easily be carried into the combustion chamber by air due to the reduction of oil viscosity during hot driving.

Therefore, the oil should be filled as prescribed. 5. The oil ring is reversed. The edge of the oil ring has a guide angle or cone, which must be assembled according to certain requirements to play the role of oil scraping.

If the key is installed, it will lead to a decrease in the oil scraping ability, resulting in channeling oil.

Summary. Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

Hello, according to your problem description, this car emits blue smoke, it is recommended to check whether the engine oil is missing, if it is missing, it is generally the engine that burns oil.

There is a lot of oil, the diesel filter element has been changed, the four matching, and the valve has been changed.

Are you there. If the oil is not lacking, then run first, but the latter shouted to measure the oil level, considering that the car has been overhauled, it may be that the organic oil in the overhaul process will go to the exhaust system, you can run and then measure the oil.

What's wrong with the exhaust system.

Because of the blue smoke, change the four packages.

What I mean by this is that if there is no shortage of oil and there is still blue smoke, then it is possible that there is some oil inside the exhaust pipe that has not been burned, so run first and then measure the oil.