Emission Concepts for Future Passenger Car Diesel Engines

Authors

Dr.-Ing. M. Krüger, Dr.-Ing. A. Wiartalla, Dipl.-Ing. Th. Lichtenberg, Dipl.-Ing. Th. Körfer, FEV Motorentechnik GmbH, Aachen

Year

2003

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 539

Summary

In order to keep the current success of the Diesel powered passenger cars also for the future, intensive development effort is absolutely necessary in the near future. A special challenge is presented by the already confirmed or discussed future emission standards. However, every chance must be taken to keep the fuel consumption of the diesel engine respectively diesel powered vehicle on the lowest possible level. In front of this background measures concerning combustion system development as well as exhaust gas aftertreatment are analyzed in this report with respect to their influence on emission reduction and fuel consumption. It can be summarized, that still a significant emission reduction potential exists for the passenger car diesel engine. However, fulfilling the next step of emission legislation, getting effective after 2005, only by combustion system improvement, seems to be a difficult way to go from todays point of view. Especially with respect to fuel consumption, an effcient combination of combustion improvement and exhaust gas aftertreatment represents a more promising solution for the future. Most important for a successful realisation of such an approach will be the overall power consumption of the exhaust gas aftertreatment device. This does also include the thermomanagement of the engine and exhaust gas system as well as the energy losses due to the regeneration demands of the discontinuously working NOx- and particulate trap. Considering this last issue, a fuel additive as partulate trap regneration aid as well as the fuel sulphur content respectively the sulphur sensitivity of the NOx-trap will play a significant role in the future.

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