Effect of structure parameters of catalyst substrate on the performance of diesel particulate filter

The filtration efficiencies of the particulate matter and the particulate number in DPF, the no-load pressure drop of DPF, and the load pressure drop of DPF were selected as key performance parameters of DPF. The influence of the cell density and the wall thickness of the DPF on these key performance parameters of DPF was studied in detail. Firstly, a calculation model of DPF was established, and the compensation mathematical model was added. Secondly, the key performance parameters of DPF were defined. Finally, based on the model, the key performance parameters are numerically investigated under different cell density and wall thickness of the DPF. Consequently, with the increase of cell density of DPF, the filtration efficiency of DPF increases, the load pressure drop of DPF decreases, but the no-load pressure drop of DPF increases. With the decrease of the wall thickness of the DPF, the no-load pressure drop of the DPF decreases, the load pressure drop of the DPF decreases, but the filtration efficiency of the DPF decreases. The most suitable combination scheme is a cell density of 200-300 CPSI and a wall thickness of 11-16 mil.