Increasing the efficiency of intra-cylinder catalysis in diesel engines

Abstract

The data of research done to systemize and choose scientific fields and search for the rational ways of an increase in the efficiency of intra-cylinder catalysis in diesel engines have been given. The use of base metal oxides and composite oxides of transition metals as the coatings for the piston combustion chamber has been substantiated. This allows us to control chemical reaction rates and reduce the formation of toxic substances. When selecting the scientific fields and rational practical ways of an increase in the efficiency of intra-cylinder catalysis in diesel engines chemical, physical and technological factors were taken into consideration. The formation of catalytic coatings based on the oxides of transition metals (Mn, Co) was provided using the plasma-electrolytic oxidizing on the Al25 alloy. These included both individual manganese and cobalt oxides and the mixed oxides of both metals. The investigation of catalytic coatings of the combustion chamber in the diesel engine piston on the basis of manganese and cobalt oxides and mixed oxides enabled the establishment of a maximum catalytic effect when cobalt oxides were used. The prototype diesel test data showed that the fuel rate in this case is decreased by 4 to 6 %, NOx emissions were reduced by 14 to 15 % and carbon oxide emissions were reduced by 20 through 25 %.