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首页> 外文期刊>Energy Conversion & Management >A real time zero-dimensional diagnostic model for the calculation of in-cylinder temperatures, HRR and nitrogen oxides in diesel engines
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A real time zero-dimensional diagnostic model for the calculation of in-cylinder temperatures, HRR and nitrogen oxides in diesel engines

机译：用于计算柴油发动机缸内温度，HRR和氮氧化物的实时零维诊断模型

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摘要

A real-time zero-dimensional diagnostic combustion model has been developed and assessed to evaluate in-cylinder temperatures, HRR (heat release rate) and NOx (nitrogen oxides) in Dl (Direct Injection) diesel engines under steady state and transient conditions. The approach requires very little computational time, that is, of the order of a few milliseconds, and is therefore suitable for real-time applications. It could, for example, be implemented in an ECU (Engine Control Unit) for the on-board diagnostics of combustion and emission formation processes, or it could be integrated in acquisition software installed on an engine test bench for indicated analysis. The model could also be used for post-processing analysis of previously acquired experimental data. The methodology is based on a three-zone thermodynamic model: the combustion chamber is divided into a fuel zone, an unburned gas zone and a stoichiometric burned gas zone, to which the energy and mass conservation equations are applied. The main novelty of the proposed method is that the equations can be solved in closed form, thus making the approach suitable for real-time applications. The evaluation of the temperature of burned gases allows the in-cylinder NOx concentration to be calculated, on the basis of prompt and Zeldovich thermal mechanisms. The procedure also takes into account the NOx level in the intake charge, and is therefore suitable for engines equipped with traditional short-route EGR (Exhaust Gas Recirculation) systems, and engines equipped with SCR (Selective Catalytic Reduction) and long-route EGR systems. The diagnostic model was tested on a GMPT-E Euro 5 diesel engine, under both steady-state and fast transient conditions. The experimental data were acquired at the dynamic test bench of ICEAL-PT (Internal Combustion Engine Advanced Laboratory at the Politecnico di Torino).
机译：已经开发并评估了实时零维诊断燃烧模型，以评估在稳态和瞬态条件下Dl（直喷）柴油发动机中的缸内温度，HRR（放热率）和NOx（氮氧化物）。该方法需要非常少的计算时间，即几毫秒的数量级，因此适合于实时应用。例如，它可以在ECU（发动机控制单元）中实现，用于燃烧和排放物形成过程的车载诊断，或者可以集成到安装在发动机测试台上的采集软件中以进行指示分析。该模型还可以用于先前获取的实验数据的后处理分析。该方法基于三区热力学模型：将燃烧室分为燃料区，未燃气体区和化学计量的燃气区，并应用了能量和质量守恒方程。所提出方法的主要新颖之处在于方程可以封闭形式求解，因此使该方法适合于实时应用。燃烧气体温度的评估允许根据迅速和Zeldovich热机制计算出缸内NOx浓度。该程序还考虑了进气中的NOx含量，因此适用于装有传统短程EGR（废气再循环）系统的发动机，以及装有SCR（选择性催化还原）和长程EGR系统的发动机。该诊断模型已在GMPT-E欧5柴油发动机上在稳态和快速瞬态条件下进行了测试。实验数据是在ICEAL-PT（都灵理工大学内燃机高级实验室）的动态测试台上获得的。

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  • 来源
    《Energy Conversion & Management》 |2014年第3期|498-510|共13页
  • 作者

    Roberto Finesso; Ezio Spessa;

  • 作者单位

    IC Engines Advanced Laboratory, Politecnico di Torino, c.so Duca degli Abruzzi 24, 10129 Torino, Italy;

    IC Engines Advanced Laboratory, Politecnico di Torino, c.so Duca degli Abruzzi 24, 10129 Torino, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nitrogen oxides; Real time; Diesel; Multizone;

    机译：氮氧化物;即时的;柴油机;多区域;

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