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

Söderena, Petri; Laurikko, Juhani; Weber, C.; Tilli, Aki; Kuikka, Keijo; Kousa, Anu; Väkevä, Outi; Venho, Antti; Haaparanta, Suvi; Nuottimäki, Jukka

doi:10.1016/j.scitotenv.2020.140971

Cited by 25 publications

(11 citation statements)

References 16 publications

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“…(1) The variation trends of the NOx emission concentration data collected by the PEMS and OBD technology with time were roughly the same, and the distribution of the data in the rising and falling sections of the two curves were almost the same (Söderena et al, 2020).…”

Section: Figure 7 Comparison Of Nox Concentration By Pems and Obdmentioning

confidence: 88%

“…Figure8shows that the NOx emission concentrations collected by the PEMS and OBD had many similarities, described as follows. (1) The variation trends of the NOx emission concentration data collected by the PEMS and OBD technology with time were roughly the same, and the distribution of the data in the rising and falling sections of the two curves were almost the same(Söderena et al, 2020). (2) The distribution of extreme points in the data collected by the PEMS and OBD were roughly the same.However, there were some differences between the data collected by the PEMS and OBD, described as follows.…”

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confidence: 79%

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Study of Real-road Nitrogen Oxide Emissions of Non-road Vehicles

Tan

Yao

et al. 2022

J. Phys.: Conf. Ser.

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The exhaust gas pollutants of the non-road vehicles are harmful to the environment. Many non-road vehicles meet the requirements of the regulations in the laboratory. However, the real-road emissions of such vehicles are sometimes higher. Measuring the real-road emissions of non-road vehicles is very important. The real-road emissions are measured by on-Board Diagnostics (OBD), but there are some problems in the data stability of OBD. The NOx emissions of a bulldozer (a type of China IV non-road vehicle) based on both portable emission measurement system (PEMS) and OBD are studied in this article. Experiments contained three working processes: idle, driving, and operating. The nitrogen oxide (NOx) emissions during operating were highest. The NOx emission characteristics of the bulldozer from PEMS and OBD have the similar variation trends. But there are still some differences, including the NOx emission value and response time. The measurement principles and different sampling points between PEMS and OBD are the main factors. An effective data processing method is introduced to reduce the differences of between the data from PEMS and OBD. Briefly, the NOx emissions of the OBD and PEMS were highly consistent. The OBD is reliable and can be widely used in non-road vehicles.

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Section: Figure 7 Comparison Of Nox Concentration By Pems and Obdmentioning

confidence: 88%

mentioning

confidence: 79%

Study of Real-road Nitrogen Oxide Emissions of Non-road Vehicles

Tan

Yao

et al. 2022

J. Phys.: Conf. Ser.

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“…Furthermore, Euro 6d-Temp standard vehicles are subjected to an RDE (Real Driving Emissions) measurement procedure with PEMS (Portable Emission Measurement System) to improve the representativeness of the homologation. Measurement results suggest that implementing this emission standard has improved the NOx emission behavior of these vehicles with respect to previous emission standards [29].…”

Section: Introductionmentioning

confidence: 89%

“…Calculating the value of M i based on the real proportion of NO and NO 2 present in the exhaust gases would be a more accurate option if the measurement equipment provided both values, but since the equipment used only provides the aggregate NOx data without disaggregating the measurement between the two components, using a theoretical proportion would be equally inaccurate but could lead to an underestimation of the emissions, so it has been considered a better option to use the above criterion of considering all NOx as NO 2 . Moreover, when NOx emission is expressed in mass units, the same criterion is widely used [29,77]. significance level (it is possible to assume that NOx concentration and "% engine load" are correlated) but significantly higher than the p-value in the Initial section.…”

Section: Appendix C Nox Mass Emission Flow Estimationmentioning

confidence: 99%

A New Approach for Static NOx Measurement in PTI

et al. 2021

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NOx emissions in vehicles are currently only controlled through the homologation process. There is a lack of knowledge to assess and control real NOx emissions of vehicles reliably. Even if vehicles in EU-27 are subject to Periodical Technical Inspection (PTI), NOx are not among the pollutants currently being controlled. For PTIs, tests need to be simple, quick, inexpensive, representative, and accurate. Ideally, tests need to be carried out under static conditions, without the need for a power bench or complex equipment. In this paper, a new approach for measuring NOx in PTI is proposed. The method has been developed and validated at a PTI Spanish station to ensure feasibility and repeatability. This method is based on the relationship between the “% engine load” value and exhaust NOx concentration at idle engine speed. Starting from the state of minimum possible power demand in a vehicle (idling and without any consumption), a load state with an average 98% increase in engine power demand is generated by connecting elements of the vehicle’s equipment. The relationship between power demand (through the “% engine load” value) and NOx concentration is then analyzed. The quality and representativity of this relationship have been checked with a p-value lower than 0.01. The method has been compared with a different NOx measurement technique, based on the simulation on a test bench and the ASM 2050 cycle, showing better performance in terms of repeatability and representativeness. The “% engine load” dispersion with the new approach is 7%, which ensures the reliability and repeatability of the method. The results show that the proposed method could be a valuable tool in PTI to detect high NOx emitting vehicles and to obtain information from the diesel vehicles fleet.

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“…The models developed based on PEMS measurements are widely used to predict the pollution in an urban area which helps to select the perfect location of urban facilities such as, for example pedestrian crossings [5]. It was also determined that the most hazardous emission is generated while accelerating from 0 to 80 km/h [6].…”

Section: Introductionmentioning

confidence: 99%

Method of verifying the emission level of the exhaust components of a special vehicle in relation to EURO III standard in road conditions

Matla¹,

Andrzej²

2021

Combustion Engines

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The following article presents the method of verification of EURO III standard in real life conditions for special vehicles. The test object qualified as a special vehicle of N3G category was tested in road conditions along a defined route, and then the obtained measurement results were compared to the exhaust emission standard (EURO III) applicable for this vehicle in transient testing mode. A method of comparing the emission factors in road conditions with the indicators obtained on the engine dynamometer was proposed. An AVL mobile exhaust gas analyzers (PEMS) dedicated for the Real Driving Emissions (RDE) road tests were used in the research.

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

Cited by 25 publications

References 16 publications

Study of Real-road Nitrogen Oxide Emissions of Non-road Vehicles

Study of Real-road Nitrogen Oxide Emissions of Non-road Vehicles

A New Approach for Static NOx Measurement in PTI

Method of verifying the emission level of the exhaust components of a special vehicle in relation to EURO III standard in road conditions

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