The factor that causes deflagration in a gasoline engine
Apr 8, 2020
In the daily repair work, it can be found that the engine caused by deflagration failure and damage is not a few.The main performance is as follows: (1) this kind of abnormal combustion often has the explosive nature, causes the engine cylinder head, the cylinder wall, the piston top, the connecting rod and so on the engine engine engine cylinder head, the cylinder wall, the piston top, the connecting rod and so on the machine parts very strong mechanical stress and the thermal stress causes the early damage.(2) the final combustion temperature of gasoline engine can reach 2000℃-2500℃, while the temperature of piston top, combustion chamber and cylinder wall is only 200℃-300℃.
In addition to the cooling water, the reason for maintaining such a low temperature includes the formation of a boundary layer of gas on these walls, which ACTS as an insulation.However, the shock wave in strong blasting will destroy this boundary layer, the lubricating oil film will be destroyed, the accelerating cylinder will be worn, and the power, economy and reliability of the engine will be obviously reduced.(3) serious cases are manifested as combustion chamber crack, piston top crack, spark plug porcelain body fracture, exhaust valve ablation, cylinder pad erosion, etc., which seriously affect the service life of the engine.
Therefore, in the use of automobiles, attention should be paid to the control and prevention of deflagration.In terms of theory of engine, which leads to the gasoline engine deflagration factors include: the ignition advance Angle, mixture concentration, ignition energy, the burning speed, the engine speed, engine load and the gasoline properties, combustion chamber carbon deposit, cooling water temperature, cylinder head and piston material, gasoline engine compression ratio, the diameter of cylinder, spark plug location and type, etc.
Therefore, in the use of automobiles, attention should be paid to the control and prevention of deflagration.In terms of theory of engine, which leads to the gasoline engine deflagration factors include: the ignition advance Angle, mixture concentration, ignition energy, the burning speed, the engine speed, engine load and the gasoline properties, combustion chamber carbon deposit, cooling water temperature, cylinder head and piston material, gasoline engine compression ratio, the diameter of cylinder, spark plug location and type, etc.