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

将电子控制的共轨系统引入大型柴油发动机，为不同燃料(如EN 590柴油、MFO、HFO)的可变喷射和燃烧提供了可能性，这些燃料根据各自的特性量身定做。因此，为燃烧低质量因此难以着火的燃料提供了新的选择。为了设置合适的喷射参数，必须获得关于喷射行为、混合气形成、燃烧和污染物形成的知识。在这方面，有关使用船用燃料(MDO、HFO)的科学信息很少。创建合适的模拟工具需要对气缸内工艺有广泛的了解。为了验证模型，必须进行光学和激光光学分析。在罗斯托克大学活塞机和内燃机研究所，光学接近的高压/高温喷射室和能够运行重燃料油的单缸研究发动机也可以通过光学接触来满足给定的要求。高端废气测量系统和化学废气分析可以验证污染物形成的模型。该项目的目的是扩大关于燃烧和污染形成的知识库，使用很少研究但可能与馏分燃料有很大不同的典型船用燃料。在此基础上，应开发适用于大型柴油机低排放燃烧的新喷油策略。

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.