Cel The main results can be summarized as follows:Materials were identified which allow the design of injection nozzles for urea solution under high temperatures and pressures.State-of-the-art common-rail injectors for diesel fuel-injection are not suited for injection of water or reducing-agent-solution due to their high leakage rates and wear.Standard diesel injection nozzles can successfully be operated with water if a sufficient amount of a suitable lubricant is added to the water, - injection pressure is not too high, - the nozzle is not used as a control device as is the case with certain common rail injectors. The wear characteristics can be improved by suitable materials.The NOx-reduction rate achieved with RAI is not sufficient. RAI is thus not economic.A theoretical model for RAI has been developed which is able to explain the failure of this method.With the combination of DWI + EGR + FWE it is possible to reduce NOx by more than 80 % while keeping reasonable smoke limits.A filter system has been developed which is able to clean exhaust gases of diesel engines operated on HFO with an efficiency of 98 % with respect to SOx and 80 % with respect to particulates.This filtering efficiency is however not sufficient to make possible the long term EGR operation of an engine burning HFO.Materials for piston rings and cylinder liner have been developed which are able to provide state-of-the-art or even better wear results in an engine running with DWI.For reduction of NOx from large Diesel engines in ships power stations the selective catalytic reduction (SCR) is assigned technology. It has several severe disadvantages, economically and technically as well as ecologically. To overcome this a package of engine modifications including reducing agent injection and exhaust gas recirculation has been developed which, however, is not yet applicable because of very high wear of engine components. It is the aim of this project to remove this obstacle by the application of new materials.The main objectives for this purpose are the following:A) Getting further insight into the mechanisms underlying the exorbitant wear phenomena observed in connection with reducing agent injection so as to improve the basis on which the questions of materials can be defined.B) Finding a compromise between the NOx reduction and the wear involved.C) Adaptation of the engine and the reducing agent injection system, in terms of design and materials used, to the higher corrosive attack, relying on the know-how as per A).D) Testing of filtering systems that are capable of cleaning ash-bearing exhaust gases and that could be for filtering the gases in the exhaust gas recycling system.A reduction of additional costs for NOx reduction of 30% is expected. Dziedzina nauki engineering and technologymechanical engineeringtribologylubrication Program(-y) FP3-BRITE/EURAM 2 - Specific programme (EEC) of research and technological development in the field of industrial and materials technologies, 1990-1994 Temat(-y) 1.3.1 - Metals and metal matrix composites Zaproszenie do składania wniosków Data not available System finansowania CSC - Cost-sharing contracts Koordynator MAN B & W Diesel GmbH Wkład UE Brak danych Adres STADTBACHSTRAßE 1 86153 AUGSBURG Niemcy Zobacz na mapie Koszt całkowity Brak danych Uczestnicy (4) Sortuj alfabetycznie Sortuj według wkładu UE Rozwiń wszystko Zwiń wszystko Industriale Srl Włochy Wkład UE Brak danych Adres Via San Quirico 19 16163 Genova Zobacz na mapie Koszt całkowity Brak danych SEMT PIELSTICK Francja Wkład UE Brak danych Adres QUAI DE SEINE 93202 SAINT-DENIS Zobacz na mapie Koszt całkowity Brak danych STE Niemcy Wkład UE Brak danych Adres EUPENER STRAßE 150 5000 KÖLN Zobacz na mapie Koszt całkowity Brak danych TECHNISCHE UNIVERSITÄT HAMBURG-HARBURG Niemcy Wkład UE Brak danych Adres DENICKESTRAßE 15 2100 HAMBURG Zobacz na mapie Koszt całkowity Brak danych
