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    • Study on the Regeneration Characteristics of Catalytic Diesel Particulate Filter Under Ultimate Carbon Load
    DOI：10.13949/j.cnki.nrjgc.2023.03.007
    Key Words:diesel engine  diesel particulate filter（DPF）  ultimate carbon load  regeneration characteristic  ash
    Author NameAffiliationE-mail
    CHEN Guisheng* Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China cgs_yly@163.com 
    ZENG Huixuqing Faculty of Public Safety and Emergency Management， Kunming University of Science and Technology， Kunming 650093， China zhxq12333@qq.com 
    TIAN Wenjing Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 2080016308@qq.com 
    ZHANG Kaiqi Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 1494169174@qq.com 
    YANG Jie* Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 328516727@qq.com 
    ZHANG Han Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China 413742763@qq.com 
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    Abstract:A three-dimensional catalytic diesel particulate filter（CDPF） model was built on the basis of a diesel engine with high pressure and common rail. The research on the regeneration characteristics of different structures of CDPF under the ultimate carbon load was carried out. The analysis on the effects of ash content and ash distribution coefficient on the regeneration characteristics of CDPF with different structures under different ultimate carbon load conditions was conducted. In accordance with the results， it indicates that the maximum temperature peaks of CDPF of symmetrical cell technology （SCT） and asymmetric cell technology（ACT） under the ultimate carbon load enhance with the growth of ultimate carbon load. The pressure drop of CDPF with different structures increases with the growth of the ultimate carbon load and the difference is obvious. As the ultimate carbon load increases， the temperature of the CDPF carrier and the soot regeneration rate have rapid growth and the peak value increases significantly. The pressure drop of CDPF and the maximum temperature of the carrier under the ultimate carbon load increase with the growth of ash content， and the pressure drop features of CDPF with different structures are quite various. The maximum temperature of the SCT structure carrier is higher than that of the ACT structure. With the growth of ash content， the soot regeneration rate of CDPF first increases and then decreases， and the soot regeneration rate has rapid increase and high peak value under high ash content. The obvious differences in pressure drop of CDPF of different structures with the same ash distribution coefficient exist under the ultimate carbon load. The pressure drop of the SCT structure is generally higher than that of the ACT structure. As the ash distribution coefficient increases， the soot regeneration rate and carrier temperature of CDPF with different structures first increase and then decrease.
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