Analysis of Temperature Field and Soot Load during DPF Drop to Idle Regeneration

HOU Zekun; TAO Jianzhong; YU Qian; TANG Jiali

Vehicle Engine ›› 2023, Vol. 0 ›› Issue (2) : 73-79.

HOU Zekun¹，TAO Jianzhong²，YU Qian³，TANG Jiali³

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Abstract

Based on the -to-idle regeneration characteristics of DPF, the regeneration temperature characteristics of silicon carbide(SiC) carrier were compared and studied at different amounts of soot loading, and the maximum soot loading of SiC carrier was derived. HORIBA SPC-2300 particle counter and AVL 472 partial flow particle analyzer were used to measure the number of particulate matter(PN), and the DPF status was analyzed by comparing the PN after droptoidle regeneration with the limit of regulation. The test results show that the maximum temperature and maximum temperature gradient of DPF increase with the increase of soot loading, the regeneration efficiency hence increases, and the residual soot loading reduces. During the drop-to-idle regeneration, the rear end temperature of SiC carrier is higher than that of the front end, and the center temperature is higher than that of the edge. When the soot loading is 11 g/L, the central temperature of DPF rear end reaches 1 171 ℃, and the regulation certification cycle after regeneration indicates that DPF has a significant decrease in the filtration efficiency of particulate matter. Cracks of SiC carrier indicate that the soot loading is so large as to exceed the upper limit of soot loading.

Key words

diesel particulate filter / drop-to-idle / regeneration / soot loading / temperature distribution

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HOU Zekun，TAO Jianzhong，YU Qian，TANG Jiali. Analysis of Temperature Field and Soot Load during DPF Drop to Idle Regeneration[J]. Vehicle Engine. 2023, 0(2): 73-79