Diesel engine deflagration
When a diesel engine deflagrates, the pressure in the cylinder suddenly increases and the piston hits the cylinder liner violently, causing loud metal knocking sounds and vibrations.
(1) Check and adjust the fuel supply advance angle
The oil supply advance angle is too large, and too much diesel is injected when the piston is near top dead center, causing the diesel pressure to rise rapidly, causing the piston to violently knock the cylinder liner when it goes down.
(2) Check diesel quality
If the quality of diesel does not meet national standards and there are too many flammable components, it will cause deflagration when the diesel is injected into the cylinder, causing the pressure in the cylinder to rise too sharply and causing piston knocking.
(3) Check the diesel engine overheating running time
If the diesel engine runs overheated for a long time, the temperature in the combustion chamber is too high. When the diesel is injected, it evaporates too quickly, burns too fast, and the pressure rises too fast, causing deflagration.
(4) Remove carbon deposits
Excessive carbon deposits in the diesel engine cylinder liner and piston cause the compression ratio to be too high, causing deflagration.
