NOx emissions from diesel light duty vehicle tested under NEDC and real-word driving conditions

Ramos, Antonio Callejo; Múñoz, Julio; Andrés, Fuensanta; Armas, Octavio

doi:10.1016/j.trd.2018.04.018

Cited by 51 publications

(29 citation statements)

References 9 publications

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“…Regarding NO x emissions and referring to diesel cars, a wealth of data exists highlighting the significant discrepancies between TA and real-world values (e.g., Kwon et al, 2017;Ramos et al, 2018;Triantafyllopoulos et al, 2019). Although a diesel car can be compliant with the Euro 6 limit during the certification procedure (WLTP, or NEDC in the past), it may exceed the relevant NO x limit under real-world conditions (Zacharof et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Assessment of CO2 and NOx Emissions of One Diesel and One Bi-Fuel Gasoline/CNG Euro 6 Vehicles During Real-World Driving and Laboratory Testing

et al. 2019

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The objective of this study is the assessment of the real-world environmental performance, and its comparison with laboratory measurements, of two Euro 6 passenger cars. The first is equipped with a common-rail diesel engine, Lean NO x Trap (LNT), and Diesel Particulate Filter (DPF), and the second is a bi-fuel gasoline/CNG (Compressed Natural Gas) vehicle equipped with a Three-Way Catalyst (TWC). The experimental campaign consisted of on-road and chassis dynamometer measurements. In the former test set, two driving routes were followed, one complying with Real Driving Emissions (RDE) regulation and another characterized by more dynamic driving. The aim of the latter route was to go beyond the regulatory limits and cover a wider range of real-world conditions and engine operating areas. In the laboratory, the WLTC (Worldwide harmonized Light vehicles Test Cycle) was used, applying the real-world road load of the vehicles. Both cars underwent the same tests, and these were repeated for the primary (CNG) and the secondary (gasoline) fuel of the bi-fuel vehicle. In all of the tests, CO 2 and NO x emissions were measured with a Portable Emissions Measurement System (PEMS). The results were analyzed on two levels, the aggregated and the instantaneous, in order to highlight the different emissions attributes under varying driving conditions. The application of realistic road load in the WLTC limited its difference from the RDE-compliant route in terms of CO 2 emissions. However, the aggressive driver behavior and the uphill roads of the Dynamic driving schedule resulted in approximately double the CO 2 emissions for both cars. The potential of natural gas to reduce CO 2 emissions was also highlighted. Concerning the NO x emissions of the diesel car, the real-world results were significantly higher than the respective WLTC levels. On the other hand, the bi-fuel car exhibited very low NO x emissions with both fuels. Natural gas resulted in increased NO x emissions compared to gasoline, always remaining below the Euro 6 limit, with the only exception being the Dynamic driving schedule. Finally, it was found that the overall cycle dynamics are not sufficient for the complete assessment of transient emissions, and the instantaneous engine, and aftertreatment behavior can reveal additional details.

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Section: Introductionmentioning

confidence: 99%

Assessment of CO2 and NOx Emissions of One Diesel and One Bi-Fuel Gasoline/CNG Euro 6 Vehicles During Real-World Driving and Laboratory Testing

et al. 2019

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“…Every one of these gases is really harmful or dangerous. That is why their amount in vehicle exhaust gases is limited and these limits are regularly tightened [21]. Development of the permissible values is shown in Table 1 and 2.…”

Section: Carbon Dioxide Co2mentioning

confidence: 99%

Comparison of emissions depending on the type of vehicle engine

Rievaj

Gaňa

Synák

2019

Logistics &Amp; Sustainable Transport

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Road transport is showing growth in the period of globalization. Its task is to transport cargo as well as people to the required location within the shortest possible time and at the lowest price. Thus, road transport plays a crucial role in enabling the globalization to be developed and improved. However, the internal combustion engine hat prevail among the vehicles of freight and passenger transport are the producers of gaseous emissions from the exhaust gases. Many developed countries of the world has committed themselves, inter alia also trough the Paris Agreement, to reduce global warming, and thus to reduce the production of harmful gaseous emissions. The result is the endeavour to replace the internal combustion engine vehicles that burn carbon fuels with the vehicles powered by electric motors consuming electric energy. The reason of such trying claims that road transport using the internal combustion engine vehicles is environmentally aggressive, and the problem would not be solved by implementation of the vehicles with electric motors. Such claim is based on the fact that an electric car does not produce any of primary emissions. From an overall perspective, it is also necessary to take into account secondary emissions that are produced during the electric energy production by which is the vehicle with electric motor powered. The purpose of this article is to assume the possibility of reducing global pollution by replacing the internal combustion engine vehicles with the vehicles powered by electric motors in dependence with producing the emissions during the production of electric energy.

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“…For example, NO X emissions during an on-road emissions test have been frequently reported to be significantly higher than the measured emissions during a standard driving cycle (e.g., New European Driving Cycle (NEDC) and Worldwide Harmonized Light Duty Cycle (WLTC)) running on a chassis dynamometer in an emissions laboratory [4]. Additionally, many independently tested vehicles also exceed the emissions limits defined in the regulation for type approval tests [5][6][7][8][9]. Owing to the significant difference between the measured emissions during a homologation test in a laboratory compared to an on-road test, several national investigation programs such RDW [10] and GOV.UK [11] were launched to investigate.…”

Section: Introductionmentioning

confidence: 99%

Practicalities and Driving Dynamics of a Real Driving Emissions (RDE) Euro 6 Regulation Homologation Test

Bodisco

Zare

2019

Energies

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One of the most important sources of air pollution, especially in urban areas, is the exhaust emissions from passenger cars. New European emissions regulations, to minimize the gap between manufacturer-reported emissions and those emitted on the road, require new vehicles to undergo emission testing on public roads during the certification process. Outlined in the new regulation are specific boundary conditions to which the route on which the vehicle is driven must comply during a legal test. These boundary conditions, as they relate to the design and subsequent driving of a compliant route, are discussed in detail. The practicality of designing a compliant route is discussed in the context of developing a route on the Gold Coast in Queensland, Australia, in a prescriptive manner. The route itself was driven 5 times and the results compared against regulation boundary conditions.

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NOx emissions from diesel light duty vehicle tested under NEDC and real-word driving conditions

Cited by 51 publications

References 9 publications

Assessment of CO2 and NOx Emissions of One Diesel and One Bi-Fuel Gasoline/CNG Euro 6 Vehicles During Real-World Driving and Laboratory Testing

Assessment of CO2 and NOx Emissions of One Diesel and One Bi-Fuel Gasoline/CNG Euro 6 Vehicles During Real-World Driving and Laboratory Testing

Comparison of emissions depending on the type of vehicle engine

Practicalities and Driving Dynamics of a Real Driving Emissions (RDE) Euro 6 Regulation Homologation Test

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