System for improving combustion and emission of diesel engine

Abstract

The invention discloses a system for improving combustion and emission of a diesel engine. The system comprises a generator, a diesel engine, a high-voltage power supply, plate electrodes, a control module and a nano fuel oil additive; the flat electrodes are correspondingly arranged at the top of a piston, the bottom of a cylinder cover and the head of a valve; the control module inquires a MAP of the electric field intensity and the electric field direction requirements of different working conditions and working phases of the diesel engine according to the fuel injection quantity and crankshaft position signals, the size and the direction and on-off of the current of the high-voltage power supply are controlled in real time, so that the intensity and the direction of an electric field between the electrode plates are changed. The system for improving combustion and emission of the diesel engine aims to produce proper 'ion wind' effect with nano additives and combustion intermediateproducts; and meanwhile, the synergistic effect of the nano additives nature is combined, and the atomization quality of fuel oil is improved, the turbulence intensity of the fuel oil mixing with airis improved, full mixing of the fuel oil and the air is promoted, the air-fuel ratio distribution in the cylinder is improved, the fuel oil is promoted to be fully combusted, and the generation amountof combustion pollutants is reduced.

Description

technical field [0001] The invention belongs to the field of combustion and emission of internal combustion engines, and specifically relates to a system for improving the combustion and emission of diesel engines based on the synergistic effect of an external electric field and nano-fuel additives. Under the influence of the fuel, it promotes the rapid combustion of fuel, thereby improving the combustion efficiency of fuel in the diesel engine cylinder and reducing the emission of the system. Background technique [0002] The combustion process of fuel is a very complicated process. For diesel engines, a rapid and perfect combustion process is very important to improve the energy conversion efficiency of diesel engines, improve fuel economy and reduce the emission of combustion pollutants. The flame of fuel combustion is a kind of weakly ionized plasma, and the electric field can change the combustion flame. In recent years, experts and scholars have paid considerable atten...

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Problems solved by technology

Although the patent uses an external electric field for the combustion flame in the cylinder, the engine is a natural gas engine and does not involve traditional diesel models, especially the research on flame diffusion combustion methods like diesel engines and their atomization and spray characteristics; The direction of the electrode added is perpendicular to the direction of piston movement, and the influence on the direction of flame propagation is also limited, and the research on electrodes parallel to the direction of piston movement has not been involved; the fuel used is natural gas fuel, and no liquid fuel will be affected by the application of an electric field. In addition, for the different combustion stages of the flame in the cylinder, how the change of the external electric field adapts to the complex combustion situation in the cylinder has not been studied

[0005] At present, the research on nano-fuel additives, although nanoparticles of rare earth metals and their compounds are added to fuel additives, most of them focus on cerium oxide (CeO 2 ), nanoparticles of other lanthanide metal compounds are not concentratedly added to fuel additives

In addition, although nano-fuel particles can accelerate fuel atomization and evaporation due to their small size and surface effects, improve combustion efficiency of diesel engines and reduce harmful emissions, they have not involved research on the combustion of nanoparticles after an external electric field is applied, especially for diesel engines. The study of non-stationary flames of

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