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Studies on the influence of diesel engine operating parameters on the properties of emitted soot particles

柴油机运行参数对排放烟尘颗粒特性影响的研究

基本信息

批准号：
137538322
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：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/137538322?language=en
关键词：
Studies influence diesel engine operating

项目摘要

The further development of diesel engines influences combustion-generated soot particles with respect to their number, size, morphology and chemical composition. Recent studies suggest that the changed properties of emitted soot particles may increase hazards for human health and for the environment. The majority of previous research is aimed at the understanding of the in-cylinder soot formation process, the reduction of in-cylinder soot particles, the exhaust aftertreatment and, in the field of biosciences, the impact of different soot particles on human health and the environment.In the first two years of this project analyses of mixture formation and combustion were linked to the physicochemical properties of the emitted soot particles for a selection of stationary engine parameters which are particularly relevant for combustion and soot formation.The results of the project show that engine parameters, e.g. boost and injection pressure, have significant influence on the physicochemical properties of emitted soot particles at stationary operating points. By connecting analyses of mixture formation, combustion and emitted soot particles, sources for changes in physicochemical properties of the emitted soot particles can be identified.In the continuation of this project the research of stationary engine operating points shall be extended to transient engine operating conditions. Recent studies show that at transient engine operating conditions, typical for real traffic scenarios, soot emission is clearly different compared to stationary operating points.

柴油机的进一步发展影响了燃烧产生的碳烟颗粒的数量、尺寸、形态和化学组成。最近的研究表明，排放的烟尘颗粒的性质改变可能会增加对人类健康和环境的危害。以往的研究主要集中在了解缸内碳烟形成过程、减少缸内碳烟颗粒、排气后处理等方面，在生物科学领域，不同烟尘颗粒对人类健康和环境的影响。在该项目的头两年，混合物形成和燃烧的分析与排放烟尘颗粒的物理化学性质有关，选择与燃烧和碳烟形成特别相关的固定发动机参数。该项目的结果表明，发动机参数，如增压和喷射压力，对固定工作点排放的碳烟颗粒的物理化学性质有重大影响。通过对混合气形成、燃烧和排放碳烟颗粒的分析，可以确定排放碳烟颗粒的物理化学性质变化的来源。在本项目的后续工作中，应将发动机稳态工作点的研究扩展到瞬态发动机工作条件。最近的研究表明，在瞬态发动机运行条件下，典型的真实的交通情况下，碳烟排放与静止运行点相比明显不同。