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―DPF内熱解析(第2報)  [in Japanese] Numerical Calculation of PM Trapping and Oxidation of Diesel Particulate Filter – Thermal Analysis in the DPF (Second Report)  [in Japanese]

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Abstract

ディーゼルエンジンから排出される微粒子状物質を抑制し除去するためにディーゼル微粒子フィルター(DPF)が用いられている.しかし,DPF内部のPMの分布と挙動を知ることは困難である.本研究では,PM堆積-再生過程におけるDPF内のPM分布及び温度の挙動を数値計算により明らかにすることを目的とした.

The particulate matter (PM) discharged from the diesel engine is collected by a diesel particulate filter (DPF) and then removed. Deterioration of fuel consumption is a serious problem since exhaust gas temperature must be increased when PM removal is performed. In this study, the numerical computation for both the behavior of PM distribution in the DPF during PM deposition-regeneration process and the heat distribution in the DPF was performed. The temperature-distribution and its change in DPF as a function of the time during PM combustion were calculated by a newly developed model. It was concluded that the amount of increasing temperature change was far larger backside in direction than that near the entrance of an inflow way. The present model can be used for optimal designing of DPF with a catalyst by assuming several operation modes of DPF device before an experimental approach.

Journal

  • Transactions of Society of Automotive Engineers of Japan

    Transactions of Society of Automotive Engineers of Japan 51(2), 274-279, 2020

    Society of Automotive Engineers of Japan

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