Monitoring Euro 6 diesel passenger cars NOx emissions for one year in various ambient conditions with PEMS and NOx sensors

被引：21

作者：

Soderena, Petri ^{[1
]}

Laurikko, Juhani ^{[1
]}

Weber, Christian ^{[2
]}

Tilli, Aki ^{[3
]}

Kuikka, Keijo ^{[3
]}

Kousa, Anu ^{[4
]}

Vakeva, Outi ^{[4
]}

Venho, Antti ^{[5
]}

Haaparanta, Suvi ^{[5
]}

Nuottimaki, Jukka ^{[6
]}

机构：

[1] VTT Tech Res Ctr Finland Ltd, Tietotie 4C POB 1000, FI-02044 Espoo, Finland

[2] Inst Transport Econ Norway, Gaustadalleen 21, N-0349 Oslo, Norway

[3] Finnish Transport & Commun Agcy, PL 320, Helsinki 00101, Finland

[4] Helsinki Reg Environm Serv Author HSY, PL 100, Helsinki 00066, Finland

[5] City Of Helsinki, PL 500, Helsinki, Finland

[6] Neste Oyj, POB 310, FI-06101 Porvoo, Finland

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2020年 / 746卷

关键词：

On-road emissions; On-road monitoring; City driving; Cold temperature; NOx emissions modelling; IMPACT;

D O I：

10.1016/j.scitotenv.2020.140971

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, the NOx emissions of four Euro 6 diesel passenger cars ranging from Euro 6 b to Euro 6 d-TEMP in different ambient conditions and driving routes were investigated with a Portable Emissions Measurement System (PEMS) and continuous NOx concentration monitoring device. A model was also generated for translating NOx concentration values into a gram basis. The results suggest that there is a marked difference in NOx emissions based on the Euro 6 step for the car is type approved. The study showed that the conformity factor for NOx emissions on a route in a city environment ("City route") changed from 0.65 to 5.2 depending on the Euro 6 step and car. Surprisingly, a Euro 6 b car equipped with Selective Catalytic Reduction SCR system and updated engine control unit (ECU) software for lower tailpipe NOx emissions provided lower average NOx emissions than a Euro 6 d-TEMP diesel car equipped with dual lean-NOx traps. Results for the City route also showed that the road infrastructure (crossroads and speed limitations) can have a noticeable effect on promoting driving that leads to higher NOx emissions even with a Euro 6 d-TEMP car. Estimations of NOx emissions with modelling based on continuous NOx concentration monitoring suggested that Euro 6 b diesel cars can provide NOx emissions close to the current RDE legislation. In addition, the modelling suggested that the Euro 6 b car with updated ECU software and the Euro 6 d-TEMP diesel car are capable of extremely low daily average NOx emissions, even close to 20 mg/km, in normal daily usage. Nevertheless, the monitoring results and model also suggest that cold ambient temperature has a high effect on the NOx emissions reduction performance of these vehicles, occasionally increasing their daily average emissions to as high as 900 mg/km. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：11