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The current decade is seeing rapid changes in heavy duty powertrains. All manufacturers at IAA were proposing solutions that support a carbon neutral future. Battery Electric (BEV) or hydrogen either in the form Fuel Cell (FCEV) or Internal Combustion Engines (H2-ICE) are being seen as the most exciting options currently. This presentation focuses in on emissions control of H2-ICE systems. Emissions control of H2-ICE requires close consideration of current and future legislation, as well as meeting new and unique challenges to deliver a sustainable zero carbon solution that the planet requires. H2-ICE SI engines can operate as stoichiometric or lean burn, the direction of emissions control can be chosen based on this. System components need to consider other factors such as possible H2 embrittlement, oil bypass, other legislative criteria emissions, global warming potential (GWP) as well as higher levels of water in the exhaust from H2 combustion.

The Euro 7 emission legislation proposal demands for more advanced system designs as well as technology improvements on both engine and catalyst side. Experience from full system programs show that there is potential to meet legislation with system based on different catalyst technologies. The selection of V- or Cu-based main technology will be discussed as this dictate some of the system boundary conditions. Recent developments of the different catalyst and filter coating technologies will be reviewed and their improved performance and durability will help widen the system boundaries and meet Euro 7.