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NOx emissions from diesel light duty vehicle tested under NEDC and real-word driving conditions

机译：在NEDC和实际驾驶条件下测试的柴油轻型车辆的NOx排放

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摘要

The interest of NOx engine emissions from diesel engines has been increasing during the last years. Particularly, the comparison of the real driving NOx emissions with the results obtained during homologation procedures has received a great attention. The main goal of this paper is to provide a statistical methodology, able to compare two different types of driving pattern conditions and the corresponding NOx engine emissions. In the present work, the two types of driving pattern analysed are the real-world driving and the chassis dyno following the New European Driving Cycle (NEDC). For the sake of generality, two types of circuits (Urban and Extra-urban) have been selected. A light-duty diesel vehicle, equipped with the same after treatment system as Euro 5 engines, was used as a test vehicle. Although in this certifications only new vehicles have to fulfil Euro 6d temp, Real Driving Emissions test (RDE) is mandatory, it is necessary to quantify the real-world driving emissions for the previous certifications (Euro 5 and Euro 4 vehicles). The statistical study demonstrates the existence of significant differences among the fundamental variables of the engine (desired injection quantity, engine speed, vehicle velocity, exhaust gas recirculation (EGR) valve opening and NOx measured emissions) when real driving and NEDC procedures are compared. Although these results have been obtained by a deductive way, they led us to state that real driving NOx emissions strongly differs from NEDC driving ones. Therefore, this manuscript constitutes a further more proof of the non-representativeness of NEDC procedure as vehicle certification procedure.
机译：在过去的几年中，柴油发动机排放的NOx发动机引起了人们的兴趣。尤其是，将实际行驶中的NOx排放与在认证过程中获得的结果进行比较已经引起了极大的关注。本文的主要目的是提供一种统计方法，能够比较两种不同类型的驾驶模式条件和相应的NOx发动机排放。在当前的工作中，分析的两种驾驶模式是现实驾驶和遵循新欧洲驾驶周期（NEDC）的底盘测功机。为了通用起见，选择了两种类型的电路（城市和城市外）。轻型柴油车用作测试车，该柴油车配备了与Euro 5发动机相同的后处理系统。尽管在此认证中，只有新车必须达到6d欧元温度要求，但实际驾驶排放测试（RDE）是强制性的，但对于先前的认证（欧洲5和欧洲4车辆），有必要对现实世界的驾驶排放进行量化。统计研究表明，在比较实际驾驶和NEDC程序时，发动机基本变量之间存在显着差异（所需的喷射量，发动机转速，车速，废气再循环（EGR）气门开度和NOx测量的排放量）。尽管这些结果是通过演绎方式获得的，但它们使我们指出，实际行驶中的NOx排放与NEDC行驶中的排放有很大不同。因此，该手稿进一步证明了NEDC程序作为车辆证明程序的非代表性。

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  • 来源
    《Transportation Research》 |2018年第8期|37-48|共12页
  • 作者

    Ramos A.; Munoz J.; Andres F.; Armas O.;

  • 作者单位

    Univ Castilla La Mancha, Escuela Tecn Super Ingenieros Ind, Campus Excelencia Int Energia & Medioambiente, E-13071 Ciudad Real, Spain;

    Univ Castilla La Mancha, Escuela Ingn Ind, Campus Excelencia Int Energia & Medioambiente, Toledo 45071, Spain;

    Univ Castilla La Mancha, Escuela Ingn Ind, Campus Excelencia Int Energia & Medioambiente, Toledo 45071, Spain;

    Univ Castilla La Mancha, Escuela Ingn Ind, Campus Excelencia Int Energia & Medioambiente, Toledo 45071, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    NOx emissions; Diesel; New; European Driving Cycle; Real driving emissions; Principal Component Analysis;

    机译：NOx排放;柴油;新;欧洲驾驶周期;实际驾驶排放;主成分分析;

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