1次元モデルによる触媒付ディーゼル微粒子フィルターのPM堆積・酸化シミュレーション  [in Japanese] PM Trapping and Oxidation in Diesel Particulate Filter with Catalyst by Numerical Calculation of One-dimensional Model  [in Japanese]

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Abstract

本研究では,DPF内のPM分布の挙動の推定を可能とする,一次元モデルによる数値計算手法を提案した.PM堆積-再生過程を繰返した結果,設定条件次第ではではPM酸化が不完全になりPMが残存した.その時,酸素供給量も減少しDPFに残存したPMによって新たなPMが堆積する現象が示唆された.

In this study, we proposed a numerical method to estimate the behavior of PM distribution in DPF both in PM-deposition and regeneration process. In the result, we found that PM oxidation was occasionally incomplete and partially remained in the DPF even if the PM deposition-regeneration process was repeated in the DPF. In such case, the phenomenon that the oxygen supply slightly decreased towards the rear part of the DPF was found, so that the remained PM in the DPF induced the new PM deposition. By using a novel model, PM deposition distribution and modeling of the oxidization reaction, where deposition-regeneration is especially repeated within DPF, could be performed and time-dependent behavior of pressure loss was considered. The present modeling will make possible suggest the required timing which performs compulsive reproduction control of DPF.

Journal

  • Transactions of Society of Automotive Engineers of Japan

    Transactions of Society of Automotive Engineers of Japan 51(2), 238-243, 2020

    Society of Automotive Engineers of Japan

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