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Vehicles manufacturers, in search of cost reduction, fill the tanks of recently manufactured vehicles with the least volume of fuel necessary for future commercialization. The adoption of such practice, depending on the diesel fuel storage conditions, may lead to oxidation products formation in the fuel system and to problems during the first start of these vehicles. Some vehicles manufacturers, trying to minimize the occurrence of these problems, replace the diesel fuel in the vehicle tank with new fuel when vehicle storage time reaches 90 days. As a result of such occurrences, the opportunity for a first fill diesel fuel development, that presented better oxidation stability during storage, was identified. In the first stage of the special diesel fuel development, various analyses where conducted in laboratory, in the sense of defining criteria for the fuel formulation, taking into consideration the chemical variability of commercial Brazilian diesel fuel type A and biodiesel.

Diesel Engines Emission Reduction Applying Cerium Nanometric and Ceriun Oxide in Piston Hard Anodized. [INTRODUCTION] The Ceriun Nanometric Properties applied in piston head promote a catalystic reaction in combustion chamber and avoid the Particulate Matter (PM) and Nitrogen Oxide (NOx) formation. The reaction as a result of material characteristic in “breathe in and out” Oxigen atoms spontaneously. [METHODOLOGY] The methodology evaluated in this project as a consequence of chemical reaction promoted by non stoichiometirc condition between Cerium and Oxigen compounds (maintain the Oxygen without his decomposition). The Oxigen can be liberated from internal combustion to exhaust system. When introduced Cerium Nanometric on the piston head the reaction can reduced effectively decreasing the NOx and PM emission and convert CO in CO2. [RESULTS] Tests in dynamometer are under development and emissions measurements will be evaluated to confirm the real NOx and PM level.