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1 Journal of Polish CIMAC

1 2010

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The effect of inner catalyst application on diesel engine performance

Janicka A., Sroka Z., Walkowiak W.

Journal of Polish CIMAC

2010

Vol. 5, no 1

59-68

This paper presents the results of the initial researches on platinum-rhodium inner catalyst application in one-cylinder compression-ignition engine (SB 3.1 type). According to recent researches [2-6] the active factor in an engine combustion space impacts on a combustion process. It is suspected that a catalyst i.e. a precious metal, affects the fuel combustion process by catalyzing the fuel-air combustion reaction (prior-combustion reactions what is correlated with shortening of combustion delay period).The researches was carried out in Division of Motor Vehicles and Internal Combustion Engines at Wroclaw University of Technology. The catalyst was put onto the engine valves surface. As a catalyst support a plasma-sprayed zirconium ceramic was used. The researches proved that the platinum-rhodium active factor on zirconium thermal barrier coating (TBC) placed into combustion chamber (inner catalyst) effects on the diesel engine performance. The impact of the inner catalyst seems to be advantageous for ignition delay. The active ceramic on the engine valve surface caused increase of in-cylinder maximum pressure and temperature values.