Passive Regeneration Characteristics of a DOC/Asymmetric-CDPF System for Heavy-Duty Diesel Engines

In this study, the properties of diesel particulate filter (DPF) structures were analyzed in terms of the particulate matter (PM) regeneration of the catalyzed DPF (cDPF) and the exhaust gas reduction efficiency. The performance of the cDPF in combination with a diesel oxidation catalyst was verifie...

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Published inInternational journal of automotive technology Vol. 23; no. 2; pp. 471 - 479
Main Authors Oh, Duck-kyu, Ko, Ahyun, Woo, Youngmin, Lee, Young-Jae, Lee, Kwan-Young, Park, Jong-Soo
Format Journal Article
LanguageEnglish
Published Seoul The Korean Society of Automotive Engineers 01.04.2022
Springer Nature B.V
한국자동차공학회
Subjects
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ISSN1229-9138
1976-3832
DOI10.1007/s12239-022-0043-9

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Abstract In this study, the properties of diesel particulate filter (DPF) structures were analyzed in terms of the particulate matter (PM) regeneration of the catalyzed DPF (cDPF) and the exhaust gas reduction efficiency. The performance of the cDPF in combination with a diesel oxidation catalyst was verified by measuring the balance point temperature (BPT) and by conducting world harmonized transient cycle (WHTC)/world harmonized stationary cycle (WHSC)-mode testing using a heavy-duty diesel engine bench. The BPT measurement results (238 °C) showed that, compared with the symmetric cDPF, the asymmetric cDPF exhibited better PM regeneration properties. Additionally, it demonstrated excellent performance in terms of fuel efficiency and reduction efficiency for the total hydrocarbons, carbon monoxide, and PM in exhaust gases. The NO, NO 2 , and NO x concentrations were analyzed in real time on stream during the cold-WHTC, hot-WHTC, and WHSC mode tests, and the NO 2 /NO x ratio was confirmed according to the cDPF structure. This study indicates the possibility of developing a stable diesel exhaust after-treatment system via passive regeneration by improving the BPT performance, exhaust gas reduction efficiency, and NO 2 /NO x ratio according to the structure of the cDPF.
AbstractList In this study, the properties of diesel particulate filter (DPF) structures were analyzed in terms of the particulate matter (PM) regeneration of the catalyzed DPF (cDPF) and the exhaust gas reduction efficiency. The performance of the cDPF in combination with a diesel oxidation catalyst was verified by measuring the balance point temperature (BPT) and by conducting world harmonized transient cycle (WHTC)/world harmonized stationary cycle (WHSC)-mode testing using a heavy-duty diesel engine bench. The BPT measurement results (238 °C) showed that, compared with the symmetric cDPF, the asymmetric cDPF exhibited better PM regeneration properties. Additionally, it demonstrated excellent performance in terms of fuel efficiency and reduction efficiency for the total hydrocarbons, carbon monoxide, and PM in exhaust gases. The NO, NO2, and NOx concentrations were analyzed in real time on stream during the cold-WHTC, hot-WHTC, and WHSC mode tests, and the NO2/NOx ratio was confirmed according to the cDPF structure. This study indicates the possibility of developing a stable diesel exhaust after-treatment system via passive regeneration by improving the BPT performance, exhaust gas reduction efficiency, and NO2/NOx ratio according to the structure of the cDPF.
In this study, the properties of diesel particulate filter (DPF) structures were analyzed in terms of the particulate matter (PM) regeneration of the catalyzed DPF (cDPF) and the exhaust gas reduction efficiency. The performance of the cDPF in combination with a diesel oxidation catalyst was verified by measuring the balance point temperature (BPT) and by conducting world harmonized transient cycle (WHTC)/world harmonized stationary cycle (WHSC)-mode testing using a heavy-duty diesel engine bench. The BPT measurement results (238 °C) showed that, compared with the symmetric cDPF, the asymmetric cDPF exhibited better PM regeneration properties. Additionally, it demonstrated excellent performance in terms of fuel efficiency and reduction efficiency for the total hydrocarbons, carbon monoxide, and PM in exhaust gases. The NO, NO 2 , and NO x concentrations were analyzed in real time on stream during the cold-WHTC, hot-WHTC, and WHSC mode tests, and the NO 2 /NO x ratio was confirmed according to the cDPF structure. This study indicates the possibility of developing a stable diesel exhaust after-treatment system via passive regeneration by improving the BPT performance, exhaust gas reduction efficiency, and NO 2 /NO x ratio according to the structure of the cDPF.
In this study, the properties of diesel particulate filter (DPF) structures were analyzed in terms of the particulate matter (PM) regeneration of the catalyzed DPF (cDPF) and the exhaust gas reduction efficiency. The performance of the cDPF in combination with a diesel oxidation catalyst was verified by measuring the balance point temperature (BPT) and by conducting world harmonized transient cycle (WHTC)/world harmonized stationary cycle (WHSC)-mode testing using a heavy-duty diesel engine bench. The BPT measurement results (238 °C) showed that, compared with the symmetric cDPF, the asymmetric cDPF exhibited better PM regeneration properties. Additionally, it demonstrated excellent performance in terms of fuel efficiency and reduction efficiency for the total hydrocarbons, carbon monoxide, and PM in exhaust gases. The NO, NO2, and NOx concentrations were analyzed in real time on stream during the cold-WHTC, hot-WHTC, and WHSC mode tests, and the NO2/NOx ratio was confirmed according to the cDPF structure. This study indicates the possibility of developing a stable diesel exhaust after-treatment system via passive regeneration by improving the BPT performance, exhaust gas reduction efficiency, and NO2/NOx ratio according to the structure of the cDPF. KCI Citation Count: 1
Author Lee, Kwan-Young
Lee, Young-Jae
Ko, Ahyun
Oh, Duck-kyu
Woo, Youngmin
Park, Jong-Soo
Author_xml – sequence: 1
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  organization: Department of Chemical and Biological Engineering, Korea University, Korea Institute of Energy Research
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  surname: Ko
  fullname: Ko, Ahyun
  organization: Korea Institute of Energy Research
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  givenname: Youngmin
  surname: Woo
  fullname: Woo, Youngmin
  organization: Korea Institute of Energy Research
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  givenname: Young-Jae
  surname: Lee
  fullname: Lee, Young-Jae
  organization: Center for Environmentally Friendly Vehicle, Korea Institute of Energy Research
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  surname: Lee
  fullname: Lee, Kwan-Young
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  surname: Park
  fullname: Park, Jong-Soo
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  organization: EcoMaster Ltd., Korea Institute of Energy Research
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CitedBy_id crossref_primary_10_1016_j_apr_2023_101947
crossref_primary_10_1080_01430750_2023_2181866
crossref_primary_10_1016_j_chphi_2023_100174
crossref_primary_10_1002_cjce_25302
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Keywords Diesel oxidation catalyst
Diesel particulate filters
Diesel emissions
Particulate matter
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StartPage 471
SubjectTerms Asymmetry
Automotive Engineering
Diesel engines
Efficiency
Engineering
Exhaust gases
Exhaust systems
Fluid filters
Nitrogen dioxide
Nitrogen oxides
Oxidation
Particulate emissions
Reduction
Regeneration
자동차공학
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Title Passive Regeneration Characteristics of a DOC/Asymmetric-CDPF System for Heavy-Duty Diesel Engines
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