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Parametric analysis of combustion and engine-out emissions in a single cylinder HSDI diesel engine.

机译：单缸HSDI柴油机燃烧和发动机排放物的参数分析。

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摘要

In-cylinder processes that reduce NOx increase particulates and vice versa. A change in one input variable leads to changes in several output variables. In practice cut and try experiments are still the norm. This research is focused on the experimental in-cylinder investigation of several technological features for understanding the engine out emissions in a demonstrator single cylinder High-Speed Direct-Injection (HSDI) diesel engine equipped with high pressure Common Rail System (CRS). HSDI engines differ from quiescent-chamber, the highly swirling flow, as well as spray/wall and flame/wall interaction effects, can significantly influence the combustion process. Previous research work in diesel combustion modeling has been focused on one injection event and is applicable only to large bore diesel engines. The combustion event in HSDI diesel engine is overcomplicated due to the reduced time frame available to complete the combustion. Previous research work lacks the fuel impingement on the walls of the combustion chamber and the effect of high swirl ratio on combustion and emissions. The new phenomenological model developed in this research accounts for the wall impingement and provides the directional overview of combustion and emissions characterization in a small bore HSDI diesel engine. Trade off emissions maps for advanced HSDI diesel engines equipped with common rail injection systems are non-existent in the literature. Trade-off 2-D and 3-D maps are developed as a part of this research for such an engine, in the conventional combustion and Low Temperature Combustion (LTC) regimes. These maps identified different strategies to reduce engine-out NOx and soot emissions. Applications of the developed 2-D and 3-D maps resulted in identifying OPERAS (Optimum, Pressure, EGR, injection timing Retard, Advance and Swirl ratio) strategies in both conventional and LTC diesel combustion regimes. The engine used in this research is a single-cylinder, 422 c.c., equipped with a common rail injection system, EGR system and swirl control mechanism. The loads and speeds chosen are representative of HEV (Hybrid Electric Vehicle) applications in medium size car.
机译：减少NOx的缸内过程会增加颗粒，反之亦然。一个输入变量的变化会导致多个输出变量的变化。在实践中，仍然尝试剪切和尝试实验。这项研究的重点是对几种技术特征进行缸内试验研究，以了解配备高压共轨系统（CRS）的演示器单缸高速直接喷射（HSDI）柴油发动机的发动机排放。 HSDI发动机与静态腔室不同，高涡流以及喷雾/壁和火焰/壁的相互作用会严重影响燃烧过程。先前在柴油机燃烧建模中的研究工作集中在一次喷射事件上，并且仅适用于大口径柴油机。由于缩短了完成燃烧的时间范围，HSDI柴油机的燃烧事件变得非常复杂。先前的研究工作缺乏燃料撞击燃烧室壁以及高涡流比对燃烧和排放的影响。在这项研究中开发的新现象学模型解决了壁撞击问题，并为小口径HSDI柴油机的燃烧和排放特性提供了方向性概述。文献中不存在用于配备共轨喷射系统的先进HSDI柴油发动机的排放权衡图。在常规燃烧和低温燃烧（LTC）方案下，针对这种发动机开发了权衡的2-D和3-D映射图。这些图确定了减少发动机排出的NOx和烟尘排放的不同策略。在常规和LTC柴油机燃烧方案中，开发的2-D和3-D映射的应用都能确定OPERAS（最佳，压力，EGR，喷射正时延迟，提前和涡流比）策略。本研究中使用的发动机是单缸422 c.c.，配备了共轨喷射系统，EGR系统和涡流控制机构。选择的负载和速度代表了中型汽车中HEV（混合动力汽车）的应用。

著录项

  • 作者

    Singh, Inderpal.;

  • 作者单位

    Wayne State University.;

  • 授予单位 Wayne State University.;
  • 学科 Engineering Mechanical.;Transportation.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 425 p.
  • 总页数 425
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;综合运输;
  • 关键词

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