What is a Car Pull Cylinder? What is a car cylinder

Hello! Automobile cylinder pulling" - the so-called "cylinder" refers to the cylinder inner wall is drawn into a deep groove, the piston, piston ring and cylinder wall friction pair lose tightness, resulting in the cylinder compression pressure reduction, power loss; The downward channeling of the combustible mixture increases the pressure of the crankcase, which will cause the crankcase ** in serious cases; The lubricating oil is channeled into the cylinder, causing the phenomenon of burning oil; Smoke from the exhaust pipe is severe; Abnormal engine noise; The engine does not work properly or even stalls.

The main causes of engine pull cylinder failure in automobiles are:

1. The engine overheating is caused by leakage and lack of water, and the engine is not replenished in time;

2. The piston ring is broken and the cylinder wall is scratched;

3. The piston pin clamp falls off and scratches the cylinder wall;

4. The piston ring is stuck in the ring groove due to carbon deposition and loses its sealing effect;

5. The piston pin goes out and scratches the cylinder wall;

6. Foreign matter enters the cylinder;

7. The gap between the piston and the cylinder wall is too small;

8. The piston pin is assembled too tightly, causing the piston to deform;

9. The piston is seriously deformed or the roof is melted;

10. The engine runs at high speed or overload for a long time.

Pulling cylinder refers to the "welding" strain of the piston, piston ring and cylinder liner surface due to high temperature. That is, there is no dry friction between the piston and the cylinder liner due to the interruption of the oil film, and the red-hot friction heat causes the micro-melting of the metal to adhere and tear off the nearby metal particles. The most fundamental reason for the cylinder is the interruption of the oil film.

According to the requirements of gas seals, the gap between the piston rings and the cylinder liners should be as small as possible, which makes their lubrication conditions very unfavorable. The friction between the cylinder liner and the piston ring depends on the elasticity of the piston ring, the operating temperature, the sliding speed, the oil film distribution, the quality of the parts and the running-in situation. When the contact surface is overloaded, the cylinder liner surface and the piston ring working surface are violently rubbed due to direct contact, resulting in a large amount of friction heat, which makes the temperature of the working surface rise sharply, and the consequence is that the two friction surfaces are welded and adhered and cause strain.

"Pull cylinder" means that the inner wall of the cylinder is drawn into a deep groove, and the friction pair of the piston, piston ring and cylinder wall loses tightness, resulting in a decrease in the compression pressure of the cylinder and a loss of power; The downward channeling of the combustible mixture increases the pressure of the crankcase, which will cause the crankcase ** in serious cases; The lubricating oil is channeled into the cylinder, causing the phenomenon of burning oil; Smoke from the exhaust pipe is severe; Abnormal engine noise; The engine does not work properly or even stalls. Drive leisurely

<> engine cylinder pulling refers to the obvious longitudinal mechanical scratches and scratches on the inner wall of the cylinder in the range of motion of the piston ring, and in severe cases, melt wear occurs, resulting in the difficulty of engine start or self-extinguishing failure. Pulling cylinders is a major accident in the engine. The fundamental reason for pulling the cylinder is that it is difficult to form an oil film between the inner wall of the cylinder, the piston ring and the piston, which causes poor lubrication and even dry friction.

Attached: The reason for the engine pulling the cylinder:

1. The engine overheating is caused by leakage and lack of water, and the engine is not replenished in time;

2. Engine oil leakage or oil consumption is too large, resulting in a serious shortage of engine oil;

3. The engine runs at high speed or overload for a long time, and the temperature is too high;

4. Poor assembly of piston pins or cylinder liners causes deformation.

The final consequence of the car cylinder pulling is the damage to the engine, and the possible damage parts are: cylinder wall, piston, connecting rod, etc.

The main reason for the car to pull the cylinder.

1. The engine overheating is caused by leakage and lack of water, and the engine is not replenished in time;

2. The piston ring is broken and the cylinder wall is scratched;

3. The piston pin clamp falls off and scratches the cylinder wall;

4. The piston ring is stuck in the ring groove due to carbon deposition and loses its sealing effect;

5. The piston pin goes out and scratches the cylinder wall;

6. Foreign matter enters the cylinder;

7. The gap between the piston and the cylinder wall is too small;

8. The piston pin is assembled too tightly, causing the piston to deform;

9. The piston is seriously deformed or the roof is melted;

10. The engine runs at high speed or overload for a long time.

The solution after the car pulls the cylinder:

If the cylinder is pulled, the cylinder head should be removed, the strain of the cylinder wall should be checked, and the cause of the strain should be found. If it is only slightly strained due to the tight fit between the piston and the cylinder wall, the cylinder wall can be slightly grinded and the original piston can still be reassembled. If the strain is severe, the cylinder should be re-bored and replaced with an enlarged piston, which is repaired in the same way as a burst cylinder.

The car cylinder is not a trivial matter, and everyone must pay attention to it.

The phenomenon of automobile cylinder pulling includes: serious smoke from the exhaust pipe, abnormal engine noise, loss of power, engine can not work normally or even stalling. Defeated.

Pulling cylinders is one of the common faults of automobile engines. The so-called "pulling cylinder" refers to the inner wall of the cylinder is drawn into a deep groove, and the piston and piston ring lose tightness when rubbing against the cylinder wall, resulting in the reduction of cylinder compression pressure and the loss of power.

The piston ring clearance is too small. If the opening, side or back clearance of the piston ring is too small, the piston ring is heated and expanded when the engine is working, and it is pressed very tightly with the cylinder wall, or the piston ring is broken, and it is easy to pull out the groove in the cylinder wall.

The piston pin comes out. Because the piston pin circlip is not installed or falls off or breaks, the piston pin escapes out in motion, which is easy to strain the inner wall of the cylinder, causing the cylinder to channel to the crankcase.

The cylinder clearance of the piston is too small or too large. If the material of the piston is poor, the manufacturing size error is too large, or the piston is deformed after the piston pin is assembled, the matching gap between the piston and the cylinder is too small, and the piston is stuck after being heated and expanded, and then the cylinder wall is strained.

The piston rings are heavily could. Excessive carbon deposits can cause the piston rings to stick or bite into the ring grooves, and the carbon deposits are a hard abrasive that grinds into longitudinal grooves in the cylinder walls.

The piston was badly off-cylinder. Due to the bending and twisting deformation of the connecting rod, the parallelism of the connecting rod journal, the main journal and the piston pin seat and the deviation of the axis degree of the sock are too large, which causes the piston to deviate from the cylinder obviously, which will accelerate the wear of the piston ring, piston and cylinder wall, and destroy the formation of oil film.

The wheel of the car cylinder is bright, which means that the cylinder wall is scratched, which is a serious failure.

A scratch on the cylinder wall means that the inside of the engine is severely injured and cannot function properly. Moreover, it will make abnormal noise, and the pressure of the cylinder will also be affected. When the cylinder is severely worn, it will cause the engine to shake violently, accelerate weakly, and the car cannot continue to drive.

When repairing, the engine can only be overhauled, the cylinder liner is lowered to repair the cylinder, the piston and piston ring are replaced, and then the cause of the fault is found and repaired.

There are several reasons for pulling the cylinder:

1. Lack of oil or poor quality: the engine cylinder has a great relationship with the oil, if the oil is seriously missing or poor quality, then the oil impurities will be more, and the engine can not be fully lubricated, which is easy to cause the phenomenon of cylinder pulling. Therefore, we usually need to change the engine oil regularly to avoid oil deterioration, and it is very important to be diligent in maintenance.

2. The engine temperature is too high: the engine is often overloaded when running long distances all year round, which is easy to cause the internal temperature of the engine to be too high. At the same time, too high engine temperature will also reduce the mechanical strength of many parts, so that the lubricating oil film on the cylinder inner wall can not be formed, which will cause the piston to partially melt, the inner wall of the cylinder liner will be broken, and the engine will be forced to stall.

3. Serious carbon deposition in the engine: after driving for a period of time, the car will produce carbon deposition and sludge, if the internal carbon deposition of the engine is more serious, then the carbon deposition will fall off from the top of the piston, and it is likely to be stuck between the piston and the cylinder, and the carbon deposition is mostly a hard abrasive, which will be ground into a longitudinal groove on the cylinder wall, resulting in the engine pulling the cylinder.

Cylinder pulling refers to the cylinder inner wall is drawn into a deep groove, and the piston and piston ring lose tightness when rubbing against the cylinder wall, resulting in a decrease in cylinder compression pressure and loss of power.

The so-called cylinder is that the inner wall of the cylinder is strained, and the reasons are: poor lubrication, carbon deposition and detachment, and lubrication problems caused by the gelatinization of the engine oil at high temperature.