Achieving NOx Emissions with Zero-Impact on Air Quality from Diesel Light-Duty Commercial Vehicles

Theodoros Kossioris (), Robert Maurer, Stefan Sterlepper, Marco Günther and Stefan Pischinger
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Theodoros Kossioris: Chair of Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, 52062 Aachen, Germany
Robert Maurer: Chair of Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, 52062 Aachen, Germany
Stefan Sterlepper: Chair of Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, 52062 Aachen, Germany
Marco Günther: Chair of Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, 52062 Aachen, Germany
Stefan Pischinger: Chair of Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, 52062 Aachen, Germany

Energies, 2025, vol. 18, issue 8, 1-23

Abstract: Many cities are still struggling to comply with current air quality regulations. Road transport is usually a significant source of NOx emissions, especially in urban areas. Therefore, NOx from road vehicles needs to be further reduced below current standards to ultra-low or even zero-impact levels. In a novel, holistic powertrain design approach, this paper presents powertrain solutions to achieve zero-impact NOx emissions with an N1 class III diesel light commercial vehicle. The design is based on a compliance test matrix consisting of six real-world scenarios that are critical for emissions and air quality. As a design baseline, a vehicle concept meeting the emission requirements as set out in the European Commission’s 2022 Euro 7 regulation proposal is used. The baseline vehicle concept can achieve zero-impact NOx emissions in 67% of these scenarios. To achieve zero-impact NOx emissions in all scenarios, further advanced emission solutions are mandatory. In congested urban areas, the use of an exhaust gas aftertreatment system preheating device with at least 20 kW of power for 1 min is required. In high-traffic highway situations, an underfloor SCR unit with a minimum volume of 12 l or the restriction of the maximum vehicle speed at 130 km/h is required.

Keywords: zero-impact NOx emissions; diesel on-road transport; exhaust gas aftertreatment technology; selective catalytic reduction (SCR); electric heater; fuel burner (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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