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Gaseous Emissions from Light-Duty Vehicles: Moving from NEDC to the New WLTP Test Procedure

机译：轻型车辆的气体排放：从NEDC转移到新的WLTP测试程序

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The Worldwide Harmonized Light Duty Test Procedure (WLTP), recently issued as GTR15 by UNECE- WP29, is designed to check the pollutant emission compliance of Light Duty Vehicles (LDVs) around the world and to establish the reference vehicle fuel consumption and CO_2 performance. In the course of the development of WLTP, the Joint Research Center (JRC) of the European Commission has tested gaseous emissions of twenty-one Euro 4-6 gasoline and diesel vehicles, on both the current European type approval test procedure (NEDC) and the progressive versions of the WLTP. The results, which should be regarded just as an initial and qualitative indication of the trends, demonstrated minimal average differences between CO_2 emissions over the NEDC and WLTP. On the other hand, CO_2 emissions measured at JRC on the NEDC were on average 9% higher than the respective type approval values, therefore suggesting that for the tested vehicles, CO_2 emissions over WLTP were almost 10% higher than the respective NEDC type approval values. That difference is likely to increase with application of the full WLTP test procedure. Measured THC emissions from most vehicles stayed below the legal emission limits and in general were lower under the WLTP compared to NEDC. Moving from NEDC to WLTP did not have much impact on NO_x from gasoline vehicles and CO from diesel vehicles. On the contrary, NO_x from diesel vehicles and CO from low-powered gasoline vehicles were significantly higher over the more dynamic WLTP and in several cases exceeded the emission limits. Results from this study can be considered indicative of emission patterns of modern technology vehicles and useful to both policy makers and vehicle manufacturers in developing future emission policy/technology strategies.
机译：最近由UNECE-WP29发布为GTR15的《全球协调轻型试验程序》（WLTP）旨在检查全球轻型车辆（LDV）的污染物排放合规性，并确定参考车辆的油耗和CO_2性能。在WLTP的开发过程中，欧盟委员会的联合研究中心（JRC）已在当前的欧洲型式认可测试程序（NEDC）和现行的欧洲型式认可测试程序以及WLTP的渐进版本。结果应被视为趋势的初步和定性指示，表明NEDC和WLTP上的CO_2排放之间的最小平均差异。另一方面，在NEDC的JRC处测得的CO_2排放量平均比相应的型式认可值高9％，因此，对于测试车辆而言，WLTP上的CO_2排放量比相应的NEDC的型式认可值高近10％。 。随着整个WLTP测试程序的应用，这种差异可能会增加。与NEDC相比，大多数车辆测得的THC排放量一直低于法定排放限值，并且在WLTP下通常较低。从NEDC转向WLTP对汽油车的NO_x和柴油车的CO的影响不大。相反，柴油车的NO_x和小功率汽油车的CO明显高于动态WLTP，在某些情况下超过了排放限值。这项研究的结果可以被认为是现代技术车辆排放模式的指示，并且对于政策制定者和车辆制造商制定未来排放政策/技术策略均有用。

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  • 来源
    《Environmental Science & Technology》 |2015年第14期|8315-8322|共8页
  • 作者

    Alessandro Marotta; Jelica Pavlovic; Biagio Ciuffo; Simone Serra; Georgios Fontaras;

  • 作者单位

    European Commission-Joint Research Centre, Institute for Energy and Transport, Sustainable Transport Unit, Ispra 21027, Italy;

    European Commission-Joint Research Centre, Institute for Energy and Transport, Sustainable Transport Unit, Ispra 21027, Italy;

    European Commission-Joint Research Centre, Institute for Energy and Transport, Sustainable Transport Unit, Ispra 21027, Italy;

    European Commission-Joint Research Centre, Institute for Energy and Transport, Sustainable Transport Unit, Ispra 21027, Italy;

    European Commission-Joint Research Centre, Institute for Energy and Transport, Sustainable Transport Unit, Ispra 21027, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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