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    • Study on the Active Regeneration Characteristics of Catalytic Diesel Particulate Filter in a Methanol/Diesel Dual Fuel Engine
    DOI：10.13949/j.cnki.nrjgc.2025.02.009
    Key Words:catalytic diesel particulate filter（CDPF）  methanol substitution rate  regeneration target temperature  initial soot load  active regeneration
    Author NameAffiliationE-mail
    HUANG Fenlian* Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 429019788@qq.com 
    WANG Yongjia Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 402030948@qq.com 
    WAN Mingding Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 915389147@qq.com 
    ZHOU Zhengwei Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 1219890865@qq.com 
    LEI Jilin Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 22972489@qq.com 
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    Abstract:A simulation model of a methanol/diesel dual fuel engine with diesel oxidation catalyst （DOC） and catalytic diesel particulate filter （CDPF） was established based on GT-Power. The effects of different methanol substitution rates， regeneration target temperatures and initial soot load on the pressure drop and temperature characteristics， complete regeneration duration and cumulative diesel consumption of the CDPF in a methanol/diesel dual fuel engine during active regeneration were investigated. The results show that the regeneration target temperatures， methanol substitution rates， and initial carbon load have significant impacts on the active regeneration of CDPF. With the increase of regeneration target temperature， the rate of pressure drop decreases. Higher regeneration target temperature can easily lead to temperature peaks in CDPF. When regeneration occurs at 650 ℃， the peak temperature of CDPF is 85 ℃ higher than the target temperature. As the methanol substitution rate increases， the pressure drops during the regeneration process slightly increases and the peak temperature of the CDPF decreases. As the initial soot load increases， the reaction rate of CDPF accelerates， the peak temperature of the CDPF and the pressure drop rate increase， and the uniformity of the internal temperature of the carrier is improved. The increase of regeneration target temperature can significantly shorten the duration of complete regeneration and reduce the cumulative diesel fuel consumption， while the methanol substitution rate has less effect on the duration of complete regeneration. With the methanol substitution rate increases from 0% to 30%， the cumulative diesel fuel consumption for complete regeneration reduces by 27.8%. Under the condition of 600 ℃ regeneration target temperature， 30% methanol substitution rate， and 20 g initial soot load， high regeneration efficiency and regeneration safety with less regeneration energy consumption can be achieved.
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