23. Internationales Stuttgarter Symposium

Automobil- und Motorentechnik

4. - 5. Juli 2023

Session: COMBUSTION & EMISSIONS | | 09:00 - 09:30

A Holistic Approach for Near Zero Emission Diesel Vehicles using a Pre-Turbo-Catalyst-System – Ready for EU 7

Michael Conin, Technische Universitat Darmstadt

This work shows the newest results of a near-series Pre-Turbo-Catalyst (PTC) system reaching lowest emissions for electrified diesel passenger cars to address future emission legislation. The PTC system is developed using a state-of-the-art tool chain containing 1D & 3D simulation approaches and testing near-series exhaust gas aftertreatment systems under real-driving boundary conditions. The innovative concept of an SCR PTC and a PTC bypass path solve the challenge of a thermal handshake between PTC and underfloor SCR System as well as the challenge of a particular filter regeneration. The development of adaptive PTC bypass path operation strategies based on exhaust gas and catalyst conditions enables lowest NOx and NH3. Using this concept, near-zero emissions can be reached in a wide range of operating scenarios while sustaining full drivability and highest efficiency. Advanced catalyst technologies enable a high emission conversion and lowest secondary emissions. These results have been achieved in the context of the INES" ("Intelligentes Niedrigst Emissions System") project, funded by the Bundesministerium für Wirtschaft und Klimaschutz Ministry for Economic Affairs and Climate Action (BMWK) and addresses research of future mobility requirements"