Technical Paper
Model-Based Comparison of Passive SCR Aftertreatment Systems for Electrified Diesel Applications
2020-06-30
2020-37-0023
The Diesel powertrain remains an important CO2 reduction technology in specific market segments due to its inherent thermodynamic combustion efficiency advantages. Diesel powertrain electrification can bring further potential for CO2 emissions reduction. However, the associated reduction in the exhaust gas temperature may negatively impact the performance of the exhaust aftertreatment (EAT) system and challenge the abatement of other emissions, especially NOx. Considering that active urea-SCR systems may be required to ensure compliance with the legislative limits, the total cost of the hybrid Diesel powertrain is expected to increase even more, therefore making it less commercially attractive. We present a model-based analysis of a Diesel hybrid electric vehicle (HEV) which is combined with an EAT system using Lean-NOx trap (LNT) technology.