Diesel generator why black smoke?

Author：gdlhwt Time：2014-08-23  

Diesel generator at high load exhaust easy black smoke. Generally when the engine load is high jet fuel into the combustion chamber to increase the combustion chamber temperature and higher plus diesel engine mixed gas forming uneven feature which will cause combustion air local area indoor insufficient burning fuel in high temperature low oxygen conditions of decomposition polymerization to form carbon smoke (Tan Hei).

The main component of soot is not a pure carbon but a kind of polymer carbon (more than 85%) but also contains a small amount of oxygen, hydrogen and ash content and its composition with the diesel engine load change. The black smoke through the filter into the soot collected together in electron microscope can see soot particles with large diameter in 0.05 M. The burning of the pyrolysis reaction of diesel engine is inevitable especially in the mixed combustion of diesel engine high temperature gas surrounded by a liquid droplet combustion process caused by high speed photography cracking reaction of the most favorable condition proof check point around will appear a lot of black smoke but in general the soot can be found in the air and the complete combustion of the exhaust black smoke in the subsequent combustion.

But if the cylinder air mixing process is slow due to lack of that expansion and make the cylinder temperature decreased the carbon does not burn and aggregated into soot. Soot makes the formation of incomplete combustion of the fuel economy dropped higher exhaust temperature black smoke exhaust combustion chamber surface area carbon and the load did not further increase the coke can cause. Piston ring, piston seizure or stuck valve failure. It does not allow the diesel engine in the long time the state of overload conditions.