CS Structure: New generation metallic catalyst substrate for 2- and 3-Wheeler applications

Affordable, efficient and durable catalytic converters for the two and three-wheeler industry in developing countries are required to reduce vehicle emissions and to maintain them at a low level; and therefore to participate in a cleaner and healthier environment. Especially, Metallic catalyst substrates from Emitec Technologies GmbH with structured foils like the Longitudinal StructureTM (LS) are fully compatible to this effort with more than 90% share of produced 2/3 Wheelers metallic catalyst substrates for the Indian customers in 2024. One decade after the market introduction of this LS structure, Emitec Technologies GmbH will introduce now a new generation of foil structure: the Crossversal StructureTM (CS) that improves further the affordability, the efficiency of metallic catalytic converters, keeping the durability at same level than previous substrate generation. The paper will briefly review the development of metallic substrates for 2/3 wheelers applications, especially the development of structured foils substrates, describe the new foil structure “CS”, compare its performances to those of previously developed metallic substrates with structured foils “LS”. For this later purpose, experimental emission measurements under WMTC driving cycle on roller bench will be carried out on one Indian BS6 - OBD2 four stroke motorcycle. The results will be discussed and the benefits of the CS Structure for current and future motorcycle applications will be drawn, especially by taking into account the specific design of the catalytic converter for BS6 OBD2 motorcycle legislation.