Optical and chemical analyses of the influence of engine operating conditions on the characteristics of soot and ash deposits in diesel particulate filters

发动机运行条件对柴油颗粒过滤器中烟灰和灰烬沉积物特性影响的光学和化学分析

• 批准号: 289214012
• 负责人: Professor Dr.-Ing. Dieter Brüggemann
• 金额: --
• 依托单位: Lehrstuhl für Technische Thermodynamik und Transportprozesse
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/289214012?language=en
• 关键词: Optical; chemical; analyses; influence; engine

Particulate filters are essential for the separation of particles from engine combustion processes and thus also for compliance with the strict emission standards in traffic sector. However, the use of particulate filter systems leads to additional challenges for the manufacturers of engines, exhaust gas aftertreatment systems and lubricating oil. In addition to the thermal control during soot oxidation or regeneration of the filter, the long-term stability of the filter plays an important role. As the filter lifespan increases, non-oxidizable components are deposited in the filter and have a significant influence on the operating behavior.The findings in the present project depict the different characteristics of soot particles from different engine operating conditions. In addition to the differences in the agglomerate structure and the nanostructure, the influence of volatile components has led to a significant influence in the oxidation behavior. Accordingly, these differences in the soot characteristics also have a strong impact on the exothermic oxidation processes during filter regeneration. In addition, initial investigations have been carried out to characterize the ash that has been introduced into the particulate filter using an oil burner system.In the follow-up of this project, the fundamental influences of the inorganic components from different lubricating oil formulations on the oxidation behavior will be examined. The findings are intended to determine what effects play a role in the changed operating behavior of aged particulate filters and how these effects should be weighted.

颗粒过滤器对于分离发动机燃烧过程中的颗粒至关重要，因此也符合交通领域严格的排放标准。然而，颗粒过滤器系统的使用给发动机、排气后处理系统和润滑油的制造商带来了额外的挑战。除了烟尘氧化或过滤器再生过程中的热控制外，过滤器的长期稳定性也起着重要作用。随着过滤器寿命的增加，不可氧化的成分沉积在过滤器中，并对操作行为产生重大影响。本项目的研究结果描述了不同发动机运行条件下碳烟颗粒的不同特性。除了团聚体结构和纳米结构的差异之外，挥发性组分的影响也导致了氧化行为的显著影响。因此，烟灰特性的这些差异也对过滤器再生期间的放热氧化过程具有强烈影响。此外，还对使用燃油燃烧器系统引入颗粒过滤器的灰分进行了初步研究。在该项目的后续研究中，将研究不同润滑油配方中的无机成分对氧化行为的基本影响。这些发现旨在确定哪些影响在老化颗粒过滤器的操作行为变化中发挥作用，以及如何对这些影响进行加权。