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Post-Dieselgate: Evidence of NOx Emission Reductions Using On-Road Remote Sensing.
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2020-04-27 , DOI: 10.1021/acs.estlett.0c00188
Stuart K Grange 1, 2 , Naomi J Farren 2 , Adam R Vaughan 2 , Jack Davison 2 , David C Carslaw 2
Affiliation  

The Dieselgate scandal which broke in September 2015 demonstrated that vehicle manufacturers, such as the Volkswagen Group (VWG), engaged in software-based manipulation which led to vehicles passing laboratory-based emission testing limits but were far more polluting while being driven on roads. Using 23 000 on-road remote sensing measurements of light-duty Euro 5 diesel vehicles in the United Kingdom between 2012 and 2018, VWG vehicles with the “Dieselgate-affected” EA189 engine demonstrated anomalous NOx emission behavior between the pre- and post-Dieselgate periods which was not observed in other vehicle makes or models. These anomalous changes can be explained by voluntary VWG hardware and software fixes which have led to improved NOx emission control. The VGW 1.6 L vehicles, with a simple hardware fix and a software upgrade, resulted in a 36% reduction in NOx, whereas the 2.0 L vehicles that required a software-only fix showed a 30% reduction in NOx once controlled for ambient temperature effects. These results show that even minor changes or upgrades can considerably reduce NOx emissions, which has implications for future emission control activities and local air quality.

中文翻译:

柴油后:使用公路遥感减少NOx排放的证据。

2015年9月爆发的Dieselgate丑闻表明,大众汽车集团(VWG)等车辆制造商从事基于软件的操纵,导致车辆通过了实验室排放测试限制,但在道路上行驶时污染更严重。2012年和2018年,VWG车辆之间使用23 000公路上远程的轻型欧5柴油车传感测量在英国的“Dieselgate影响” EA189发动机表现出异常的NO X排放的前和后之间的行为在其他车辆品牌或型号中未发现的柴油门期间。这些反常的变化可以通过自愿VWG硬件和软件修复这些都导致了改进的NO来解释X排放控制。VGW 1.6 L车辆经过简单的硬件修复和软件升级,NO x减少了36%,而仅需软件修复的2.0 L车辆在控制了环境温度后,NO x减少了30%温度影响。这些结果表明,即使微小的变化或升级,可以大大减少NO X的排放量,这对未来的排放控制活动和当地空气质量的影响。
更新日期:2020-04-27
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