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首页> 外文期刊>Fuel >Modelling of the auto-ignition angle in diesel HCCI engines through D-optimal design
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Modelling of the auto-ignition angle in diesel HCCI engines through D-optimal design

机译：通过D优化设计对HCCI柴油机自燃角进行建模

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摘要

The HCCI (Homogeneous Charge Compression Ignition) process is one of the most promising combustion processes developed to reduce pollutant emissions from automotive vehicles. However, there are practical difficulties concerning the control of the onset of ignition, and thus the availability of simple models which allows to simulate the auto-ignition phenomena may be very interesting for the development of new HCCI engines. In this work, the onset of ignition in a HCCI engine and the auto-ignition angle were modelled (OAM and AAM respectively) through experimental plans based on the D-optimal criterion. The experimental values were obtained by using the chemical kinetic code CHEMKIN together with an appropriate diesel fuel surrogate. The models developed have an acceptable goodness-of-fit and predictive capability (differences lower than 3 CAD were obtained between modelled and real auto-ignition angles for all the cases). The relative fuel/oxidant ratio and the intake temperature were the most significant engine parameters affecting the onset of auto-ignition, while the intake temperature and pressure appear as the most important parameters determining the auto-ignition angle. These models could be used by the Engine Control Unit (ECU) as an on-board diagnostic technique to control the HCCI combustion in real time. The optimal engine parameters for five specific operating conditions (chosen to cover the most common light duty diesel vehicles operating modes) were also calculated by using the above mentioned models (OAM and AAM) and by solving two non-linear optimization problems. To achieve optimization, a desirability function was defined. The optimization methodology proposed can be used to obtain the optimum engine parameters, which are used by the ECU, matching different vehicle requirements.
机译：HCCI（均质充气压缩点火）工艺是为减少汽车污染物排放而开发的最有前途的燃烧工艺之一。然而，在控制点火开始方面存在实际困难，因此对于新型HCCI发动机的开发而言，允许模拟自燃现象的简单模型的可用性可能是非常令人感兴趣的。在这项工作中，通过基于D最佳准则的实验计划，对HCCI发动机的起燃点和自燃角进行了建模（分别为OAM和AAM）。通过使用化学动力学代码CHEMKIN和适当的柴油替代品获得实验值。所开发的模型具有令人满意的拟合优度和预测能力（在所有情况下，模型点火角与实际自动点火角之间的差异均小于3 CAD）。相对燃料/氧化剂比和进气温度是影响自燃开始的最重要的发动机参数，而进气温度和压力则是决定自燃角度的最重要参数。发动机控制单元（ECU）可以将这些模型用作车载诊断技术，以实时控制HCCI燃烧。通过使用上述模型（OAM和AAM）并解决两个非线性优化问题，还可以计算出五个特定工况（选择以涵盖最常见的轻型柴油车工况）的最佳发动机参数。为了实现优化，定义了期望函数。所提出的优化方法可用于获得ECU所使用的最佳发动机参数，以匹配不同的车辆要求。

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  • 来源
    《Fuel》 |2010年第9期|P.2561-2568|共8页
  • 作者

    J.J. Hernandez; J. Sanz-Argent; J.M. Carot; J.M. Jabaloyes;

  • 作者单位

    E.T.S.I. Industriales (Edificio Politecnico), Universidad de Castilla-La Mancha, Avenida Camilo Jose Cela s. 13071, Ciudad Real, Spain;

    E.T.S.I. Industriales (Edificio Politecnico), Universidad de Castilla-La Mancha, Avenida Camilo Jose Cela s. 13071, Ciudad Real, Spain;

    Departamento de Estadistica e I.O. Aplicadas y Calidad, Universidad Politecnica de Valencia, Camino de Vera s. 46022, Valencia, Spain;

    Departamento de Estadistica e I.O. Aplicadas y Calidad, Universidad Politecnica de Valencia, Camino de Vera s. 46022, Valencia, Spain;

  • 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

    HCCI combustion; auto-ignition angle; engine optimization; D-optimal design;

    机译：HCCI燃烧;自燃角度引擎优化;D最佳设计;

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