31. Aachen Colloquium Sustainable Mobility

Ultra-Low Emissions from a Truck with Close-Coupled Emission Control System and Active Thermal Management using e-Fuels


P. M. Villafuerte, J. Demuynck, D. Bosteels - AECC - Association for Emissions Control by Catalyst, T. Wilkes, V. Mueller, P. Recker - FEV Europe GmbH


The European economy requires that materials and goods be distributed by heavy-duty vehicles both on the countryside and within our cities every day. These vehicles need to be clean and efficient to comply with expected stringent future pollutant emissions and demanding CO2 standards. On the pollutant side, the upcoming new Euro 7 regulation will likely focus on ensuring the emissions from heavy-duty vehicles are minimized over extensive on-road operating conditions and in particular in urban driving including cold-start operation. These challenges are increased by the need to ensure low NH3 and N2O emissions as well.

This study shows ultra-low pollutant emissions achieved by a heavy-duty diesel demonstrator vehicle over a broad range of operating conditions. Previous work indicated what a close-coupled emission control system including dual-SCR could achieve. In this paper, the results obtained by the integration of active thermal management to the system are discussed including further improvement of cold-start and urban operation emissions. Also, avoidance of emission slip after stop periods with idling engine are investigated. The innovative emissions control system implemented on the truck integrates a close-coupled DOC, including an electrically heated catalyst (EHC), a cata-lysed DPF, a dual-SCR system -one in a close-coupled position-, with twin AdBlue® dosing. Both SCR catalysts contain an ammonia slip catalyst….

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