What is the reason why black smoke and noise disturb the community when the construction generator sets in the community are disturbing the public?

Recently, there have been reports that many elderly people in the community reported that the generator sets rumbling every day, the windows could not be opened, and the black smoke made people cough. The reason is that due to the construction of a power plant near a certain community, the black smoke and noise of the diesel generator sets have caused many troubles to the residents of the community.
Haixing Power Technology technicians analyzed that:
On the one hand, it may be a problem with the quality of the power generation group itself, and it has not met the relevant pollutant and noise emission standards. Haixing recommends repairing or eliminating this type of diesel generator set that has quality problems as a result of early maintenance or elimination;
on the other hand, it may be due to the failure of the diesel generator set during use, which may cause black smoke or noise. Smoke from the generator set is generally generated when the diesel engine is loaded, such as acceleration, hill climbing or overload operation, which may also be a product of combustion. Under the large load of the diesel engine, the combustion chamber temperature is high, and too much fuel is injected, and the mixture is uneven. There is insufficient air during combustion in some areas. The fuel is prone to cracking under high temperature and lack of oxygen, and gathers into black smoke.
These problems will be found during the daily maintenance of diesel generator sets, and maintenance measures should be taken in a timely manner. If the unit is not repaired and maintained in time, it is easy to cause an accident if the unit is improperly applicable.