On-road emissions of Euro 6d-TEMP passenger cars on Alpine routes during the winter period

Suarez-Bertoa, Ricardo; Valverde, V.; Pavlovic, Jelica; Clairotte, Michaël; Selleri, Tommaso; Franco, Vicente; Kregar, Zlatko; Astorga, Covadonga

doi:10.1039/d0ea00010h

Cited by 12 publications

(13 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Emissions from passenger car transport play a major role in air quality and climate change. Various publications from recent years have shown that there are in some cases considerable variances in emissions in dependence of external criteria such as driving cycles or test route characteristics such as altitudes, traffic congestion and operating or outside temperatures [1][2][3]. Therefore, uncertainties remain, as current emission inventories and databases do not capture all these variances and thus do not represent the actual emissions of all vehicles models or driving situations.…”

Section: Introductionmentioning

confidence: 99%

Investigating Particulate and Nitrogen Oxides Emissions of a Plug-In Hybrid Electric Vehicle for a Real-World Driving Scenario

et al. 2022

View full text Add to dashboard Cite

Plug-in hybrid electric vehicles (PHEVs) show a high pollutant emission variability that strongly depends on the operating conditions of the internal combustion engine. Additionally, studies indicate that driving situations outside of the real driving emissions boundary conditions can lead to substantial pollutant emission increases. The objective of this study is to measure and analyze the particulate number (PN) and nitrogen oxides (NOx) emissions of a Euro 6 PHEV for a selected real-world driving test route in the Stuttgart metropolitan area. For this purpose, the vehicle is set out with multiple measurement devices to monitor vehicle internal and external parameters. Particle distribution results show an overall uniform pattern, which allows a comparative analysis of the different test scenarios on the basis of the PN concentration. While the trip-average PN emissions are in good agreement, transient effects during highway driving can substantially increase emissions, whereas the fuel consumption does not necessarily increase in such situations. PN measurements including ultrafine particles (UFP) show a significant increase in urban emissions due to higher cold start emission peaks. Additionally, low ambient temperatures raise the uncertainty of NOx and PN cold start emissions. With regard to future emission regulations, which claim that vehicles need to be as clean as possible in all driving situations, PHEV emission investigations for further situations outside of the current legislations are required.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigating Particulate and Nitrogen Oxides Emissions of a Plug-In Hybrid Electric Vehicle for a Real-World Driving Scenario

et al. 2022

View full text Add to dashboard Cite

show abstract

“…For NO x , the contribution was lower in most RDE short tests. Other studies have also found a high contribution from cold start for CO (>70%), but this is smaller for NO x (40-60%) for turbo-charged GDI vehicles [53][54][55]; however, lower percentages have also been reported for RDE trips [32,56]. The cold start contribution was around 50% for NH 3 .…”

Section: Cold Startmentioning

confidence: 88%

“…Thermal management methods, such as those based on burners, reformers, and electrically heated catalysts, might further decrease cold start emissions, and a degree of electrification might be necessary [27,[86][87][88][89]. However, in some cases, urban emissions of hybrid electric vehicles might be higher due to the longer time needed for the catalyst to warm up; thus, further calibration efforts are needed [32,90]. Furthermore, keeping the TWC temperature and lambda value at appropriate levels in urban stop-and-go traffic situations will be important.…”

Section: Discussionmentioning

confidence: 99%

“…It has been shown that, in real-world congested urban traffic, due to low load and long idling, it takes longer for the catalyst to reach the optimum temperature, resulting in high emissions [29]. The issue is more pronounced at low ambient temperatures, where it takes more time to reach thermal stability of the engine and the aftertreatment devices [30][31][32]. Higher urban emissions, by a factor of five, have been reported at low ambient temperatures [31,33].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Extreme Temperatures and Driving Conditions on Gaseous Pollutants of a Euro 6d-Temp Gasoline Vehicle

et al. 2021

Self Cite

View full text Add to dashboard Cite

Gaseous emissions of modern Euro 6d vehicles, when tested within real driving emissions (RDE) boundaries, are, in most cases, at low levels. There are concerns, though, about their emission performance when tested at or above the boundaries of ambient and driving conditions requirements of RDE regulations. In this study, a Euro 6d-Temp gasoline direct injection (GDI) vehicle with three-way catalyst and gasoline particulate filter was tested on the road and in a laboratory at temperatures ranging between −30 °C and 50 °C, with cycles simulating urban congested traffic, uphill driving while towing a trailer at 85% of the vehicle’s maximum payload, and dynamic driving. The vehicle respected the Euro 6 emission limits, even though they were not applicable to the specific cycles, which were outside of the RDE environmental and trip boundary conditions. Most of the emissions were produced during cold starts and at low ambient temperatures. Heavy traffic, dynamic driving, and high payload were found to increase emissions depending on the pollutant. Even though this car was one of the lowest emitting cars found in the literature, the proposed future Euro 7 limits will require a further decrease in cold start emissions in order to ensure low emission levels under most ambient and driving conditions, particularly in urban environments. Nevertheless, motorway emissions will also have to be controlled well.

show abstract

“…A common method to reduce NH 3 emissions is to install an ammonia slip catalyst that has the issue of non-selective oxidation to yield NO x and N 2 O. The control of these pollutants requires the multiscale and integrated design of novel catalyst formulations and engineering solutions for the monolith and aftertreatment configuration [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Aftertreatment Technologies for Diesel Engines: An Overview of the Combined Systems

2021

View full text Add to dashboard Cite

The abatement of the pollutants deriving from diesel engines in the vehicle sector still represents an interesting scientific and technological challenge due to increasingly limiting regulations. Meeting the stringent limits of NOx and soot emissions requires a catalytic system with great complexity, size of units, and number of units, as well as increased fuel consumption. Thus, an after-treatment device for a diesel vehicle requires the use of an integrated catalyst technology for a reduction in the individual emissions of exhaust gas. The representative technologies devoted to the reduction of NOx under lean-burn operation conditions are selective catalytic reduction (SCR) and the lean NOx trap (LNT), while soot removal is mainly performed by filters (DPF). These devices are normally used in sequence, or a combination of them has been proposed to overcome the drawbacks of the individual devices. This review summarizes the current state of NOx and soot abatement strategies. The main focus of this review is on combined technologies for NOx removal (i.e., LNT–SCR) and for the simultaneous removal of NOx and soot, like SCR-on-Filter (SCRoF), in series LNT/DPF and SCR/DPF, and LNT/DPF and SCR/DPF hybrid systems.

show abstract

On-road emissions of Euro 6d-TEMP passenger cars on Alpine routes during the winter period

Abstract: Vehicles show higher emissions at cold temperature. Nevertheless, emissions during real world tests can be below Euro 6d-TEMP requirements. The relatively high PN emissions from gasoline and PHEV vehicles indicate there is still room for improvement.

Cited by 12 publications

References 41 publications

Investigating Particulate and Nitrogen Oxides Emissions of a Plug-In Hybrid Electric Vehicle for a Real-World Driving Scenario

Investigating Particulate and Nitrogen Oxides Emissions of a Plug-In Hybrid Electric Vehicle for a Real-World Driving Scenario

Effect of Extreme Temperatures and Driving Conditions on Gaseous Pollutants of a Euro 6d-Temp Gasoline Vehicle

Aftertreatment Technologies for Diesel Engines: An Overview of the Combined Systems

Contact Info

Product

Resources

About