In the operation state of the diesel engine, smoke from the chimney of different degrees of black smoke.

Diesel exhaust black smoke, indicating lack of fuel in the combustion chamber to conduct combustion air, fuel at high temperatures decompose hypoxia polymerized crystalline soot ink, with exhaust emissions and black.

　　When the engine has just started, you can see from the chimney there are shares similar mushroom cloud of thick black smoke out, then disappear, smoke turned to normal. This is due to the diesel engine has just started, the fuel pump rack engraved line position in which large, and there is no turbocharger exhaust energy to drive, resulting in a serious lack of fresh air in the combustion chamber, the mixed fuel and gas out of proportion. After the engine starts, the joint adjustment allows the fuel pump has a callback, turbocharger work gradually towards normal, get fresh air in the combustion chamber is gradually increased, so that the mixing ratio of fuel and air tend to be normal, black smoke disappearing. Therefore, diesel black smoke start when the unit is not a fail-diesel engine.

　　After the normal operation of the diesel engine, if continued smoky, sometimes even more serious, the operation state of the diesel engine is not normal, this case must find the cause, and appropriate treatment.