Examination of Engine Measures for the Regeneration of Catalytic Activated Diesel Particulate Filters in Commercial Vehicles

Authors

Dr.-Ing. P. Spurk, Dr. M. Pfeifer, Dr. B. van Setten, OMG AG & Co KG, Hanau-Wolfgang; Prof. Dr.-Ing. G. Hohenberg, Dipl.-Ing. Ch. Gietzelt, Technical University Darmstadt

Year

2003

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 539

Summary

The regeneration of a loaded particulate filter is one of the biggest challenges in the development of filter systems. The reason therefore is that under certain conditions the exhaust gas temperature does not reach the required minimum temperature for regeneration for a longer period of time. This paper describes results achieved with a catalytic coated filter alone and in combination with engine measures which are used to increase the exhaust gas temperature. The activity of the catalytic coated filter was evaluated by using the well known balance temperature test. In addition the soot burning rate was determined at different exhaust gas temperatures. The examined engine measures included intake air throttling and a control of . A special lowtemperature transient test was designed to evaluate the regeneration efficiency of the catalytic coated filter and the described engine measures under more realistic conditions. The results achieved in this examination show that the operating range of a filter system can be extended by the optimised catalytic coated filter in combination with engine measures. The combination enables the system to regenerate the loaded filter even at low temperature operation.

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