Application of 48V Mild-Hybrid Technology for Meeting GHG and Low NOx Emission Regulations for MHD Vehicles 2023-01-0484
Vehicle OEM’s for MHD applications are facing significant challenges in meeting the stringent 2027 low-NOx and GHG emissions regulations. To meet such challenges, advanced engine and aftertreatment technologies along with powertrain electrification are being applied to achieve robust solutions. FEV has previously conducted model-based assessments to show the potential of 48V engine and aftertreatment technologies to simultaneously meet GHG and low NOx emission standards. This study focuses on evaluating the full potential of 48V electrification technology through addition of 48V P3 hybrid system to the previously developed 48V advanced engine and aftertreatment technology package.
Previously, a model-based approach was utilized for selection and sizing of a 48V system-enabled engine and aftertreatment package for class 6-7 MHD application. The advanced engine and aftertreatment technology package comprised of engine downspeeding, exhaust VVT, close-coupled SCR, and 48V system components such as ETurbo , EGR pump, and catalyst heater. The performance of the advanced engine and aftertreatment package was compared to that of the baseline engine over engine certification cycles.
To assess the full potential of the 48V technology, the advanced engine and aftertreatment package was integrated with a 48V P1P3 hybrid powertrain. The performance of the baseline and the advanced vehicle were compared over the 3 Bin Moving Averaged Method instituted by CARB under omnibus regulation. The critical parameters compared were fuel economy, tailpipe NOx emissions, aftertreatment system temperature, and payback period. The analysis showed the potential offered by the 48V hybrid system for meeting future low NOx and GHG emission regulations.
Citation: Fnu, D., Bustamante, O., Joshi, S., Koehler, E. et al., "Application of 48V Mild-Hybrid Technology for Meeting GHG and Low NOx Emission Regulations for MHD Vehicles," SAE Technical Paper 2023-01-0484, 2023, https://doi.org/10.4271/2023-01-0484. Download Citation
Author(s):
Dhanraj Fnu, Oscar Bustamante, Satyum Joshi, Erik Koehler, Michael Franke, Dean Tomazic
Affiliated:
FEV North America Inc
Pages: 16
Event:
WCX SAE World Congress Experience
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Nitrogen oxides
Greenhouse gas emissions
Environmental regulations and standards
Engines
Fuel economy
Variable valve timing
Powertrains
Exhaust gas recirculation (EGR)
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