Monitoring Euro 6 diesel passenger cars NOx emissions for one year in various ambient conditions with PEMS and NOx sensors
| Autor: | Keijo Kuikka, Juhani Laurikko, Suvi Haaparanta, Anu Kousa, Antti Venho, Aki Tilli, Outi Väkevä, Jukka Nuottimäki, Christian Weber, Petri Söderena |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
City driving 010504 meteorology & atmospheric sciences Portable emissions measurement system NO emissions modelling On-road emissions City environment Cold temperature On-road monitoring Environmental engineering 010501 environmental sciences 01 natural sciences Pollution SDG 11 - Sustainable Cities and Communities Diesel fuel Environmental Chemistry Environmental science Engine control unit Waste Management and Disposal NOx 0105 earth and related environmental sciences |
| Zdroj: | Söderena, P, Laurikko, J, Weber, C, Tilli, A, Kuikka, K, Kousa, A, Väkevä, O, Venho, A, Haaparanta, S & Nuottimäki, J 2020, ' Monitoring Euro 6 diesel passenger cars NO x emissions for one year in various ambient conditions with PEMS and NO x sensors ', Science of the Total Environment, vol. 746, 140971 . https://doi.org/10.1016/j.scitotenv.2020.140971 |
| DOI: | 10.1016/j.scitotenv.2020.140971 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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