A System for Improving Diesel Engine Combustion and Emissions

Abstract

The invention discloses a system for improving combustion and emission of a diesel engine, which includes a generator, a diesel engine, a high-voltage power supply, a flat electrode, a control module and a nano-fuel additive. The flat electrode is respectively arranged on the top of the piston, the bottom of the cylinder head and the head of the valve. According to the fuel injection quantity and crankshaft position signal, the control module queries the MAP map of the electric field strength and electric field direction requirements of the diesel engine in different working conditions and working stages, and controls the on-off of the high-voltage power supply and the magnitude and direction of the current in real time, thereby changing the electric field between the electrode plates The strength and direction of the nano-additives and combustion intermediate products are designed to produce an appropriate "ion wind" effect, and at the same time, combined with the synergistic effect of the properties of the nano-additives themselves, the atomization quality of the fuel is improved, the turbulence intensity of the mixture of fuel and air is increased, and the The full mixing of fuel and air improves the distribution of the air-fuel ratio in the cylinder, promotes the full combustion of fuel, and reduces the amount of combustion pollutants.

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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