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Environmental pollution from engine exhaust emissions has attracted worldwide attention. Besides vehicular pollution, the significance of engine exhaust emission from stationary utility engines, particularly genset for electrical energy applications, has also been realized. The emission norms for gensets in India have already been proposed. However, further scope of reduction of emissions needs to be explored for these class of engines as well as wide range of fuels like gasoline, diesel, kerosene, those running on LPG and CNG. A study has been carried out to understand and assess the level of emissions with various fuels and possible scope of improvements. The study was done on kerosene run portable genset for optimization of engine parameters like ignition timing, air-fuel ratio and compression ratio to reduce CO, HC and NOx emissions.

Ceramic Hot tubes are developed as a cost effective substrates for 2 and 3 wheelers Catalytic Converter. These are used instead of ceramic honeycomb substrates for the applications where, lower conversion is enough to meet the emission norms. Ceramic hot tubes are more appropriate for 4-stroke two wheelers which are marginally failing to meet Indian emission norms for year 2000. The low thermal expansion cordierite based ceramic hot tubes offer very high thermal shock resistance, high temperature strength, very low back pressure and adequate geometrical surface area. The unique design of this product can withstand severe thermal stresses up to 1200°C. This is required for long durability against mechanical vibrations and extraordinary temperature rise expected in Indian two and three wheelers. Hence ceramic hot tubes have advantage over metallic hot tubes. Under the present work, two different configurations of ceramic hot tubes have been developed.