The comprehensive performance of engine cylinder pulling when the engine is roaring, the piston (ring) moves at high speed, and it needs to maintain a high pressure in the cylinder to form an explosion. Therefore, the piston (ring) can move quickly through sliding friction with the cylinder wall, and at the same time, the oil-gas mixed explosive can be sealed in the cylinder to prevent it from leaking out and burning fully. In addition, the piston ring and the cylinder wall should maintain a certain concentricity, enough close contact and enough small gap, and a certain oil film should be formed between them through oil.
Once the cylinder is pulled, the groove marks will appear on the cylinder wall, the oil film can no longer be guaranteed, and the piston can not maintain the original smooth and continuous sliding friction movement. This means that the movement of the piston is no longer simply completed on the cylinder axis, but will produce a certain motion component and a vertical force component. In this way, the cylinder will hit the cylinder wall and produce the so-called "knocking" sound, and the engine will have abnormal sound and feel stuffy, and will hear vibration when idling.
The car must be stuffy, because the cylinder pressure is insufficient after the cylinder is pulled, the engine combustion is insufficient, and the engine output power is insufficient, which directly leads to the car running fast and climbing a small slope may be very difficult.
However, the leakage on the cylinder wall will directly cause the oil to enter the cylinder for combustion. In the case of insufficient cylinder pressure, the exhaust pipe will expel blue smoke or black smoke. At the same time, some combustible substances will run into the crankcase, causing excessive internal pressure.
It will be difficult to start the car after the cylinder is pulled, because the cylinder pressure is insufficient, and the engine is not easy to start, because the lubricating oil returns to the bottom of the car after stopping for a period of time, and the resistance is relatively large, while the temperature of engine parts is low and the cylinder pressure is insufficient, so it is not easy to start. Or after driving, the idle speed will shake violently, and the engine will turn off soon, or the engine will run for a while and turn off due to lack of work.
Due to insufficient combustion, most of the energy is converted into heat energy instead of mechanical work, so the temperature of the engine will be relatively high, which will directly cause abnormal water temperature, and even the water tank will boil after running for a period of time.
The cylinder is pulled seriously, the engine can't start normally, and the car can't work at all.
The use and maintenance of the car are in place. Although it has been used for a long time, it can pull the cylinder and avoid engine wear. This is similar to pulling out the cylinder. We'll change it then. Because of long-term friction, it will have a certain service life. However, in the normal design life range, the engine cylinder will be pulled off, which is often caused by careless use and maintenance.
If there is a problem with the cooling system, the cooling water temperature is relatively high, and the engine heat is not released in time, it will cause the temperature between the piston ring and the cylinder wall to be too high, which will lead to the expansion and deformation of the piston ring and the cylinder wall, aggravate the friction and directly cause cylinder pulling.
The use of inferior oil, or the mixed use of several oils with different specifications, or the failure of lubrication system, such as oil leakage, leads to insufficient lubrication between cylinder wall and piston ring, and direct friction between metals leads to cylinder pulling.
There is something wrong with the quality of the gasoline used. When burning, there are many sundries or carbon deposits, or the air filter is damaged, and some dust runs into the cylinder, which is directly scratched by long-term friction.
The automobile works at high speed or under heavy load for a long time, or the cylinder liner and other accessories are not assembled after maintenance, or the cylinder quality is problematic.
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