TY - JOUR
T1 - Passive Regeneration Characteristics of a DOC/Asymmetric-CDPF System for Heavy-Duty Diesel Engines
AU - Oh, Duck kyu
AU - Ko, Ahyun
AU - Woo, Youngmin
AU - Lee, Young Jae
AU - Lee, Kwan Young
AU - Park, Jong Soo
N1 - Funding Information:
This research was funded by the Center for Environmentally Friendly Vehicle (CEFV) as the Global-Top Project of the Ministry of Environment, Korea (KMOE).
Publisher Copyright:
© 2022, KSAE.
PY - 2022/4
Y1 - 2022/4
N2 - 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.
AB - 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.
KW - Diesel emissions
KW - Diesel oxidation catalyst
KW - Diesel particulate filters
KW - Particulate matter
UR - http://www.scopus.com/inward/record.url?scp=85127474306&partnerID=8YFLogxK
U2 - 10.1007/s12239-022-0043-9
DO - 10.1007/s12239-022-0043-9
M3 - Article
AN - SCOPUS:85127474306
SN - 1229-9138
VL - 23
SP - 471
EP - 479
JO - International Journal of Automotive Technology
JF - International Journal of Automotive Technology
IS - 2
ER -