“Innovative Exhaust Gas Aftertreatment to Enable Advanced and Environmentally Friendly Spark Ignition and Diesel Engines“

Authors

Rolf Brück, Wolfgang Maus, Peter Hirth, Emitec GmbH

Year

2006

Summary

The technological development of gasoline and diesel engines, current and in the future, show certain trends of convergence for the exhaust gas systems of both engine types. Increased engine out emissions and reduced exhaust gas temperatures are expected for both concepts, through which the requirements for the exhaust gas after treatment systems are clearly defined. Technologies like low temperature coatings, catalysts with additional integrated functionality and especially thermal management systems will be required. From a catalyst substrate side two solutions to the presented problem are shown. Compact-catalyst canning can reduce heat losses by using the hot exhaust gases as insulation and hence reducing the emissions. The concept of the coated heat exchanger allows the gas and heat flow to be directed such that the exothermal energy can be shifted from its place of origin to the “cold” gas inlet area. Here the energy is used to increase the gas temperature in front of the catalyst.

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