Multiple injection strategies for optimizing mixture formation and combustion in large-sized Diesel engines aiming for lowest CO2- and pollutant emission using maritime fuels

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Introducing electronically controlled common rail systems to large-sized Diesel engines offers the potential of variable injection and combustion of different fuels (e.g. EN 590 Diesel, MFO, HFO) tailored to their individual properties. Thereby new options for combusting low quality and hence hardly ignitable fuels are given. For setting suitable injection parameter knowledge about injection behavior, mixture formation, combustion and pollutant formation has to be gained. In this matter scientific information regarding the use of maritime fuels (MDO, HFO) are rare. Creating suitable simulation tools requires broad knowledge about the in-cylinder processes. To validate the models optical and laser-optical analyses are necessary. At the University of Rostock, Institute of Piston Machines and Internal Combustion Engines an optically accessible high-pressure / high-temperature injection chamber and a single-cylinder research engine capable of running heavy fuel oils, also optically accessible, fulfill the given requirements. High-end exhaust gas measuring systems and chemical exhaust gas analytic can validate models of pollutant formation.The purpose of this project is to enlarge the knowledge base regarding combustion and pollution formation using hardly studied, but marine-typically fuels, which may differ significantly from distillate fuels. Based on that knowledge new injection strategies for low emission combustion in large-sized Diesel engines shall be developed.