摘要
采用1D数值模拟软件AVL BOOST，建立柴油机催化型柴油颗粒捕集器主动再生反应模型，研究降怠速再生（DTI）期间初始碳载量、再生温度、再生/怠速流量、再生/怠速氧含量、怠速进入时刻等因素对DPF峰值温度和峰值温度梯度的影响规律。结果表明：随着初始碳载量、再生温度和氧含量增加，峰值温度、峰值温度梯度和炭烟反应量均增加；随着再生/怠速流量增加，峰值温度、峰值温度梯度和炭烟反应量均降低；在主动再生产生热量和怠速剩余积炭均较高时进入怠速，峰值温度和峰值温度梯度达到最大值，较早和较晚进入怠速，峰值温度和峰值温度梯度均降低；峰值温度和峰值温度梯度与DPF内部炭烟反应量呈正相关关系。
Abstract
The catalytic diesel particulate filter model was built by using AVL Boost one-dimensional numerical analysis software and the effects of initial soot load，regeneration temperature, regeneration/idle mass flow, regeneration/idle oxygen content and idle entry timing on the peak temperature and peak temperature gradient were investigated. The results show that the peak temperature, peak temperature gradient and the amount of soot reaction increase with the increase of initial soot load, regeneration temperature and oxygen content and decrease with the increase of regeneration/idle mass flow. The peak temperature and peak temperature gradient reach the maximum when entering the idle at the period that both the heat generated by active regeneration and idle residual soot deposition are high, and both decrease later or earlier than the period. And they have a positive correlation with the amount of soot reaction.
关键词
催化型柴油颗粒捕集器 /
降怠速再生 /
数值模拟 /
峰值温度 /
碳载量
Key words
catalytic diesel particulate filter /
drop-to-idle regeneration /
numerical simulation /
peak temperature /
soot load
鲜建，魏宽，杨怡，张艳华，陈海昆，刘志敏.
基于模型的CDPF降怠速再生特性研究[J]. 车用发动机. 2022, 0(2): 9 https://doi.org/10.3969/j.issn.1001-2222.2022.02.002
XIAN Jian，WEI Kuan，YANG Yi，ZHANG Yanhua，CHEN Haikun，LIU Zhimin.
Model-based Regeneration Characteristics of CDPF for Drop to Idle[J]. Vehicle Engine. 2022, 0(2): 9 https://doi.org/10.3969/j.issn.1001-2222.2022.02.002
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