Simulation and grey relational analysis of continuous regeneration “balance point” of diesel particulate filters

Based on the bench test, a model describing the performance of the CR-DPF has been derived. Proposing the pressure drop of regeneration "balance point" as an evaluation criterion of the regeneration performance of the diesel particulate filter during the steady-state conditions, on the basis of the numerical simulation, the grey relational theory was applied to calculate the relational degree between the "balance point" and the parameters of emission. During low temperature area(280°C~450°C), it was showed that the gas velocity, the exhaust temperature, the mass fraction of NO₂ and m(NO₂)/m(soot) are the main factors, and the mass fraction of O₂ is relatively minor.