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2018-03

Cummins diesel generator set combustion process is divided into several stages

The combustion process of Cummins diesel generator set is generally divided into four stages: ignition delay period, rapid combustion period, slow combustion period and post combustion period. The specific performance of each combustion stage is different. By observing the performance of each combustion stage, we can know what kind of working state the unit is in, so that customers can better use the unit.
Cummins diesel generator set combustion process in four stages.
1. The ignition delay period refers to a series of physical and chemical preparation processes from the beginning of fuel injection to ignition, which goes through a series of physical and chemical preparation processes such as spray, heating evaporation, diffusion, mixing and initial oxidation. It is an important parameter of the combustion process and has a direct impact on the characteristics of the combustion heat release process.

2. The fuel injected into the combustion chamber during the ignition delay period is burned almost at the same time during the rapid combustion period, so the heat release rate is very high and the pressure rise is particularly fast.

3. The combustion of the fuel during the slow burn phase depends on the speed of mixing. Therefore, enhancing the air turbulence in the combustion chamber and accelerating the mixing of air and fuel play an important role in ensuring that the fuel burns quickly and completely near the top dead center.
4. The mixing and combustion time of the unit is very short, so that some fuels cannot be burned in time near the top dead center, and the heat released in the later stage of the expansion stroke cannot be fully utilized. Therefore, the fuel should be avoided as much as possible during the post-combustion period.
The first three stages are the main stages of fuel combustion for Cummins diesel generator sets. It is necessary to ensure that the fuel is burned in time during these three stages as much as possible, so that the fuel can be fully utilized and the work efficiency can be achieved.
Cummins diesel generator set engine adopts gear centrifugal water pump forced water cooling, large flow water channel design, good cooling effect, can effectively reduce heat radiation and noise. The unique spin-on water filter can prevent rust and corrosion, control acidity and remove impurities.