Study On Influence Factors And Power Optimization During Regeneration Balance Process Of Divisionally Diesel Particular Filter

As the main power source of automobiles,diesel engines are widely used in heavy-duty trucks,large passenger cars,construction machinery and other fields due to their high efficiency,high power and low fuel consumption.The data in "2018 China Motor Vehicle Environmental Management Annual Report" shows:As of December 2017,the number of diesel vehicles was 19.567 million in China,and the total discharge of four major pollutants was 8.386 million tons.In the "Three-Year Action Plan for Winning the Blue Sky Defence War" issued by the State Council in July 2018,the treatment of diesel vehicle pollutants was listed as the key area of air pollution control.Particles are one of the main pollutants emitted by diesel engines.The most effective post-processing device for treating diesel particulate emissions is the Diesel Particulate Filter(DPF).In recent years,the active heating regeneration of Diesel Particulate Filter by microwave has become a research hotspot of Diesel Particulate Filter regeneration technology due to its high regeneration efficiency,uniform heating and low secondary pollution.However,due to the large impact on the vehicle power supply during the microwave heating regeneration process,the service life of the vehicle power supply is affected.Therefore,under the premise of ensuring the regeneration performance of the Diesel Particulate Filter,the influencing factors in the microwave regeneration process are analyzed,and the optimal control of the energy consumption in the regeneration process has important research significance and engineering application value.This paper studies the power consumed in the process of Diesel Particulate Filter's microwave regenerative,and which is based on the National Natural Science Foundation project "catalytic Diesel Particulate Filter working process dynamics and synergy mechanism research[51406017]",A divisional microwave regeneration model of Diesel Particular Filter was established and verified in this paper.The key parameters(Porosity,regeneration time,motor rotation angle,exhaust temperature,oxygen flow rate,etc.)of the divisional microwave regeneration balance process of the Diesel Particular Filter were extracted by the way of orthogonal design.The four-level orthogonal simulation calculation of regeneration efficiency and power consumption in the regeneration process was carried out by using the divisional microwave regeneration model.The influence of key parameters on the regeneration efficiency and microwave power consumption in the microwave regeneration process of the Diesel Particular Filter was obtained.Finally,the optimal combination of parameters for the regeneration process is determined.Based on the analysis of the research results,the effects of various environmental variables on the particle trap regeneration efficiency and microwave power during the microwave regeneration process of the Diesel Particulate Filter are obtained,and the optimal parameter combination is found to achieve the microwave.Optimization of microwave power for regenerative Diesel Particulate Filter.The main innovations and research contents of the thesis are as follows:(1)Aiming at the structure and characteristics of Diesel Particulate Filter's research on divisional microwave regenerative,the DPF microwave regeneration model was established.and the accuracy of the model was verified.The model was used to simulate the microwave regeneration process,and the temperature variation curve of the filter wall surface and the variation of the filter particle deposition amount in the radial direction were obtained.(2)The effects of exhaust parameters(exhaust flow,exhaust temperature,etc.)are analyzed on regenerative equilibrium temperature,pressure drop,and power.It is found that as the exhaust gas temperature increases,the regenerative equilibrium temperature increases continuously;the oxygen content in the range of 6%-15%will have a very significant effect on the regeneration efficiency,but the effect on the regenerative equilibrium temperature is very weak.(3)The gray correlation prediction method is used to identify the influencing factors of the particle trap regeneration process,and the influence of key parameters is obtained on regeneration efficiency and microwave power consumption.Considering the regenerative performance requirements of the regeneration process,the orthogonal test design method is used to further optimize the regenerative power consumed by the divisional microwave regenerative DPF regeneration process.After optimization,its regeneration efficiency is 9.8%higher than before,and the power consumption is increased by 28%.The research work in this paper can not only simulate the mass of particles deposited in the process of regeneration of divisional DPF,but also provide a theoretical guidance for the research of regenerative power consumption of Diesel Particulate Filter,and provides a research idea with reference value for other types of Diesel Particulate Filter.