TY - GEN
T1 - Hardware-in-the-loop investigation of emissions challenges in hybrid medium-and heavy-duty powertrains using a pre-production diesel-electric parallel hybrid system with and without stop-start operation
AU - Lerin, Chloé
AU - Curran, Scott
AU - Moses-DeBusk, Melanie
AU - Cook, Adian
AU - Colomer, Vicente Boronat
AU - Kaul, Brian
AU - Deter, Dean
N1 - Publisher Copyright:
© ICEF 2021.All right reserved.
PY - 2021
Y1 - 2021
N2 - Hybrid electric powertrains are a growing market in medium- and heavy-duty applications. There is a lack of available information to understand the challenges in the integration of engine platforms into electrified powertrains, such as cold-start, restart, and load-reduction effects on emissions and emission control devices. Results from the Heavy Heavy-Duty Diesel Truck (HHDDT) cycle using a conventional medium-duty diesel engine were compared with those of a parallel hybrid architecture. Oak Ridge National Laboratory in collaboration with the US Department of Energy and Odyne Systems, LLC developed a powertrain in a hardware-in-the-loop environment, integrating the Odyne Systems, LLC medium-duty parallel hybrid system, which was used for the hybrid portion of this study. Experiments under the HHDDT cycle showed increasing improvements in fuel consumption and engine-out emissions with the integration of stop/start, hybrid, and hybrid with stop/start. However, the effects of load reduction and exhaust temperature on the thermal management strategy have shown an increase in fueling in the second part of the HHDDT cycle. Four configurations of medium-duty electrification were studied and contributed to building a unique data set containing combustion, emissions, and system integration data. Each electrification level was compared with the conventional baseline. The calibration of the conventional engine was not altered for this study. Opportunities to tailor the combustion process were identified with the stop/start strategy.
AB - Hybrid electric powertrains are a growing market in medium- and heavy-duty applications. There is a lack of available information to understand the challenges in the integration of engine platforms into electrified powertrains, such as cold-start, restart, and load-reduction effects on emissions and emission control devices. Results from the Heavy Heavy-Duty Diesel Truck (HHDDT) cycle using a conventional medium-duty diesel engine were compared with those of a parallel hybrid architecture. Oak Ridge National Laboratory in collaboration with the US Department of Energy and Odyne Systems, LLC developed a powertrain in a hardware-in-the-loop environment, integrating the Odyne Systems, LLC medium-duty parallel hybrid system, which was used for the hybrid portion of this study. Experiments under the HHDDT cycle showed increasing improvements in fuel consumption and engine-out emissions with the integration of stop/start, hybrid, and hybrid with stop/start. However, the effects of load reduction and exhaust temperature on the thermal management strategy have shown an increase in fueling in the second part of the HHDDT cycle. Four configurations of medium-duty electrification were studied and contributed to building a unique data set containing combustion, emissions, and system integration data. Each electrification level was compared with the conventional baseline. The calibration of the conventional engine was not altered for this study. Opportunities to tailor the combustion process were identified with the stop/start strategy.
KW - Electrification
KW - Heavy-duty
KW - Hybrid powertrain
KW - Medium-duty
KW - Stop/start
UR - http://www.scopus.com/inward/record.url?scp=85120638516&partnerID=8YFLogxK
U2 - 10.1115/ICEF2021-68317
DO - 10.1115/ICEF2021-68317
M3 - Conference contribution
AN - SCOPUS:85120638516
T3 - Proceedings of ASME 2021 Internal Combustion Engine Division Fall Technical Conference, ICEF 2021
BT - Proceedings of ASME 2021 Internal Combustion Engine Division Fall Technical Conference, ICEF 2021
PB - American Society of Mechanical Engineers
T2 - ASME 2021 Internal Combustion Engine Division Fall Technical Conference, ICEF 2021
Y2 - 13 October 2021 through 15 October 2021
ER -