Design And Simulation Study On Burner-type Diesel Particulate Filter

With the sharp increase in car ownership in recent years, car exhaust emission pollution problems have become increasingly severe, particularly in diesel particulate emissions, it is difficult to reach a new vehicle emission standards, it's in great request of developing an efficient, energy-saving, practical imminent diesel particulate trap. The burner-type DPF which is studied in this paper do not need to consume car batteries power, and there is no requirements of diesel fuel with sulfur content below 150 10-6 like catalyst regeneration, continuous passive regeneration of renewable technologies, it's a good fitness in line with China's national conditions, high efficiency and reliability of good regeneration.This paper is supported by National 863 Program (2008AA11A116) Manufacture of High Efficiency & Low Emission Diesel, National Natural Science Foundation of China(50876027) Research on Mixed Regeneration Mechanics of Diesel Particulate Trapped Porous Medium Based on Microwave and Ce-Mn Fuel Addition and Hunan Natural Science Funding Key Program of China (06JJ20018) Numerical Simulation of Gas-Particle Two-Phase Flow and Combustion During Complex Regeneration in Vehicle Diesel Particulate Filter. Building physical models and numerical simulation methods in AVL Boost Software, the regeneration performance and regeneration characteristics of different road conditions were studied.The main reserch work are expressed as follows:(1) the basic principles and combustion system components of burner-type DPF are expatiated, on this basis, simulation model has established in AVL Boost Software, simulation results prove the correctness of this model, which can be used to carry out the basis of regeneration performance analysis.(2) A number of important parameters on the regeneration processes summarized by a preliminary analysis of the regeneration characters of burner-type DPF. By changing the engine load, fuel-air matching forms, the initial deposition amount of particulates and exhaust mass flow, and other factors, the trapping and regenaration properties of burn-type DPF were analysis, provide a certain basis for structural optimization and performance improvements of burner-type DPF.(3) The U.S. FTP-75 driving cycle, the EU NEDC driving cycle and the U.S. HWY highway driving cycle were analyzed to obtain regeneration efficiency and regeneration cycle of burner-type DPF in cities, suburbs and high-speed run-time road conditions, provide a reliable theoretical basis for the use on diesel vehicles in a variety of road conditions.