At the top of the diesel engine pistons, valves and combustion chamber wall around the resulting carbon deposition is a more common phenomenon, it is actually the diesel combustion chamber and Cuanru of oil a product of incomplete combustion. Make a lot of coke combustion bad, the deterioration of heat transfer and reduce the reliability of the work of the injector. Carbon deposition caused by various reasons, mainly:

1. Injector does not work properly, such as non-performing atomization, drop of oil, fuel injection pressure is too high or too low and too early or too late fuel injection time, the amount of fuel injection too, will have some of the incomplete combustion of fuel.

2. With the wrong brand of diesel oil, poor quality, after the formation of coal combustion residue.

3. Diesel overloading or temperature is too high, too soon on fire, so that the incomplete combustion of fuel.

4. Cooling water temperature is too low, the impact of the normal fuel combustion.

5. Severe leakage.

6. Oil channeling serious.