柴油机颗粒捕集器降怠速再生可靠性试验研究

董光雷; 孙楠楠; 南征; 张秋实; 刘海涛; 华伦

车用发动机 ›› 2025, Vol. 0 ›› Issue (1) : 34-38.

栏目

柴油机颗粒捕集器降怠速再生可靠性试验研究

董光雷^1,2，孙楠楠^1,2，南征³，张秋实³，刘海涛³，华伦³

作者信息 +

Experimental Study on Reliability Performance of DTI Regeneration for DPF

DONG Guanglei^1,2，SUN Nannan^1,2，NAN Zheng³，ZHANG Qiushi³，LIU Haitao³，HUA Lun³

Author information +

文章历史 +

摘要

柴油机颗粒捕集器（DPF）在实际使用过程中会频繁怠速再生，这种不正常再生是导致DPF高温烧裂的主要原因，导致DPF可靠性降低。针对这一问题，通过搭建燃烧器台架对堇青石DPF进行重复性降怠速（DTI）测试，探究了相同碳载量及再生工况下DPF再生的一致性，通过DPF载体内部的温度分布、PN排放特性以及最终CT扫描结果，评估了DPF的耐久性及坚固性。结果表明：30次DTI测试中，DPF内部温度分布不均匀，峰值温度出现在靠近载体出口端，DPF从中心到边缘位置温度逐渐降低，载体边缘处出现较大的温度梯度；30次DTI后载体PN排放未见明显升高，距国六限值仍有较大裕量；CT扫描未见明显裂痕。

Abstract

The diesel particulate filter (DPF) will frequently drop to idle and regenerate during the actual application, and this abnormal regeneration is the main reason of DPF hightemperature melting or cracking, resulting in the reduction of DPF reliability. To address this issue, a burner bench was built to perform a repeatable dropping-to-idle (DTI) test on cordierite DPF. The consistency of DPF regeneration under the same soot load and regeneration conditions was investigated, and the durability and robustness of DPF were evaluated by the temperature distribution inside the carrier of DPF, PN emission characteristics and CT scan results. The results showed that the temperature distribution inside the DPF was uneven during the 30 times DTI tests, and the maximum temperature occured near the outlet end of carrier. The temperature of DPF gradually decreases from the center to the edge, and the larger temperature gradient appeared at the edge of carrier. The PN emission did not increase significantly after 30 times DTI, and there was still a large margin from the China Ⅵ limit, and no obvious cracks were found in CT scan.

导出引用

董光雷，孙楠楠，南征，张秋实，刘海涛，华伦. 柴油机颗粒捕集器降怠速再生可靠性试验研究[J]. 车用发动机. 2025, 0(1): 34-38

DONG Guanglei，SUN Nannan，NAN Zheng，ZHANG Qiushi，LIU Haitao，HUA Lun. Experimental Study on Reliability Performance of DTI Regeneration for DPF[J]. Vehicle Engine. 2025, 0(1): 34-38