There are two main types of fault is a piston, piston knocking, damage refers to a part of the engine and the engine body impact, resulting in engine cylinder and other important parts of the damaged phenomenon; another refers to the cylinder, slight case is due to dry friction will cause the piston surface pull hair
The piston is one of the most important parts of the engine, because it is always working under high temperature and pressure, are often prone to scuffing, fracture, damage and even knocking phenomenon. In addition to the piston itself, the failure of any of the other associated components may cause damage to the engine. Here the common fault of the piston to be analyzed.
A piston related to the cause of the cylinder
The so-called ramming cylinder is due to the damage of a part of the engine and the impact of the engine, causing serious damage to the engine cylinder and other important components. Vibrating cylinder is one of the biggest fault of the engine, with devastating force piston strength is low, except for the piston composition is not qualified or unqualified microstructure, inferior piston under high pressure and high load not high temperature working environment caused by knocking other accidents, as well as for the following reasons:
1, due to the valve into the cylinder caused by the top surface of the piston is damaged, the piston is broken seriously, causing the cylinder accident;
2, because the piston pin fracture, the fracture process of piston pin on movement of the moment to the piston pin hole of piston pin, the connecting rod and the breaking out after continued movement to pound pound cylinder accident caused by piston;
3, due to the North Baotou heavy truck cylinder liner damage, the piston in the course of movement due to resistance and broken, causing the cylinder;
4, due to the failure of the lubrication system caused by the phenomenon of holding the shaft, the piston runs beyond the normal load range thus triggering the cylinder;
5, the crankshaft fracture, connecting rod rupture after the impact of the piston and cylinder caused by ramming cylinder;
6, the connecting rod screw off can also lead to damage caused by piston cylinder;
7, severe engine cylinder after the piston and the cylinder piston in the lock, not up and down under the external force is broken;
Reason two, piston cylinder
The piston cylinder is a common fault, a slight case is due to dry friction will scratch the piston surface; when the knocking sound heard with a slight engine when the piston surface has been produced with molten metal, if not timely maintenance will be the piston and cylinder sleeve locking. The reasons are as follows:
1, the lubricating oil is too thin no effective lubrication or lubrication system (such as oil) failure cause between the piston and the cylinder sleeve friction coefficient increases, causing cylinder;
2, Baotou beiben heavy truck parts caused by improper adjustment of engine ignition time, engine detonation, deflagration, engine oil high temperature destroys the protective film, resulting in cylinder scoring;
3, the engine air filter, oil filter, fuel filter not timely replacement, cleaning, pollution of cylinder working environment, resulting in cylinder scoring;
4, overload, engine cooling system problems destroy oil film in cylinder;
5, the engine carbon deposit too much carbon into the cylinder cylinder product off the lead;
6, piston ring, piston ring broken lead cylinder die;
7, Baotou beiben heavy truck parts change the running direction of piston rod bending in cylinder;
8, the piston and the cylinder piston installation or improper installation is not complete, the gap is too large or too small can also lead to scuffing.