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With the implementation of Emissions Stage 5 in Europe all passenger cars with diesel engines need after treatment systems with Diesel Particulate Filters (DPF). Therefore Indian post BS-IV regulations are expectedto force the introduction of DPFs for the Indian domestic market as well. In this paper a new low porosity Aluminum Titanate (AT) DPF generation is discussed and how this new product family can help address specific requirements for the Indian market. Two new technologies of the DuraTrap®AT DPFs complement the existing portfolio. One technology has an increased soot mass limit, the second new product significantly reduces the pressure drop over the filter.

India is the world’s largest two-wheeler (2Wh) market. With the proportion of its middle class rapidly rising, 2Wh sales and the resulting emissions, are expected to grow exponentially. The decision to leap-frog from BSIV to BSVI emission norms shows India’s commitment to clean up its atmosphere. As of now, the regulation mandates Gaseous Pollutant (CO, HC, NOx) emission limits for all 2Whs and a particulate limit (PM & PN) for 2Whs powered by Direct Injection (DI) engines. Most of the 2Whs manufactured in India are powered by gasoline engines using the Port Fuel Injection (PFI) technology, and hence by definition particulate emission limits do not apply to them. Particulates when inhaled - especially of the ultrafine sizes capable of entering the blood stream - pose a serious health risk. This was the primary motivation to investigate the particulate emission levels of the 2Whs, which as on date, do not come under the purview of BSVI regulation.