Correction of Test Cycle Tolerances: Evaluating the Impact on CO2 Results

Pavlovic, Jelica; Marotta, Alessandro; Ciuffo, Biagio; Serra, Simone; Fontaras, Georgios; Αναγνωστοπουλοσ, Κωνσταντινοσ; Tsiakmakis, Stefanos; Arcidiacono, Vincenzo; Hausberger, Stefan; Silberholz, Gérard

doi:10.1016/j.trpro.2016.05.250

Cited by 21 publications

(12 citation statements)

References 3 publications

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“…Therefore, it is expected to lead to an increase of the overall CO2 emissions, as already reported in literature for vehicles equipped with conventional powertrains [31,32] This section provides an additional contribution, analyzing the impact of the new TA procedure on a test case vehicle representative of current state of the art of the hybrid technology.…”

Section: Co2 Emissionsmentioning

confidence: 92%

Impact of Different Driving Cycles and Operating Conditions on CO2 Emissions and Energy Management Strategies of a Euro-6 Hybrid Electric Vehicle

et al. 2017

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Although Hybrid Electric Vehicles (HEVs) represent one of the key technologies to reduce CO 2 emissions, their effective potential in real world driving conditions strongly depends on the performance of their Energy Management System (EMS) and on its capability to maximize the efficiency of the powertrain in real life as well as during Type Approval (TA) tests. Attempting to close the gap between TA and real world CO 2 emissions, the European Commission has decided to introduce from September 2017 the Worldwide Harmonized Light duty Test Procedure (WLTP), replacing the previous procedure based on the New European Driving Cycle (NEDC). The aim of this work is the analysis of the impact of different driving cycles and operating conditions on CO 2 emissions and on energy management strategies of a Euro-6 HEV through the limited number of information available from the chassis dyno tests. The vehicle was tested considering different initial battery State of Charge (SOC), ranging from 40% to 65%, and engine coolant temperatures, from −7 • C to 70 • C. The change of test conditions from NEDC to WLTP was shown to lead to a significant reduction of the electric drive and to about a 30% increase of CO 2 emissions. However, since the specific energy demand of WLTP is about 50% higher than that of NEDC, these results demonstrate that the EMS strategies of the tested vehicle can achieve, in test conditions closer to real life, even higher efficiency levels than those that are currently evaluated on the NEDC, and prove the effectiveness of HEV technology to reduce CO 2 emissions.

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Section: Co2 Emissionsmentioning

confidence: 92%

Impact of Different Driving Cycles and Operating Conditions on CO2 Emissions and Energy Management Strategies of a Euro-6 Hybrid Electric Vehicle

et al. 2017

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“…This has been improved in WLTC by normalizing the emissions according to the measured driven distance during the test [26,27]. Another change is through REESS (Rechargeable Electric Energy Storage System) monitoring which is called REESS charge balance (RCB) correction in which the CO 2 emissions are required to be corrected according the amount of energy drawn from the battery during the test cycle [28,29]. This is owing to the fact that the vehicle battery is fully charged at the start of the test and it depletes during the cycle, which means the energy from the battery can be drawn and consumed over the cycle possibly leading to lower CO 2 emissions and better fuel economy; however, this is not always the case in real driving conditions [28,29].…”

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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“…Reported data [136] show that the annual reduction rate of the average CO 2 emissions during the last five years (2011 -2015) is equal to 3.1%. As discussed in [126,137], the 2015 target of 130 gCO 2 /km has been reached already two years in advance by most vehicle manufactures, to an important extent due to the use of test protocol margins [1,58,63,126,138]. Most manufacturers complied with their 2015 targets already in 2013 and trends show that the 95 gCO 2 /km target could be achieved in 2020.…”

Section: Discussion and Policy Implicationsmentioning

confidence: 99%

“…provisions or interpretations made on various loosely defined boundaries like those applied on the speed profile, the test temperature definition, the calculation of vehicle resistances, the vehicle preparation, etc. [58,63];…”

Section: Structurementioning

confidence: 99%

Development of a CO2 emissions quantification tool for road transport – connecting detailed vehicle simulation and macro emission tools

Tsiakmakis¹,

Τσιακμάκης²

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Οι εκπομπές CO2 από την οδική κυκλοφορία έχουν ολοένα μεγαλύτερη σημασία στη συζήτηση για την κλιματική αλλαγή. Διάφορα μοντέλα και πρακτικές εφαρμόζονται σήμερα για την εκτίμηση της επίδρασης τεχνολογικών και πολιτικών επιλογών στην κατανάλωση καυσίμου επιβατικών οχημάτων και στην ενεργειακή αξιολόγηση συστημάτων μεταφοράς, ωστόσο, αυτά, είτε δεν διαθέτουν την απαιτούμενη ακρίβεια στο τελικό αποτέλεσμα, είτε χρειάζονται ένα επίπεδο λεπτομέρειας στις παραμέτρους εισόδου που απαγορεύει τις προσομοιώσεις σε μεγάλη κλίμακα ή/και τον συνδυασμό με άλλα μοντέλα ή λογισμικά, όπως μοντέλα προσομοίωσης κυκλοφορίας, μοντέλα υπολογισμού κόστους κ.α.. Υπό αυτό το πρίσμα, η παρούσα διδακτορική διατριβή στοχεύει στο συνδυασμό προσεγγίσεων προσομοίωσης κατανάλωσης καυσίμου οχημάτων, όπως αυτά χρησιμοποιούνται σε αναλυτικά μοντέλα προσομοίωσης, με εμπειρικές σχέσεις που προκύπτουν από τον συνδυασμό και την ανάλυση δεδομένων μετρήσεων και άλλων διαθέσιμων δεδομένων, σε ένα ολοκληρωμένο, ευέλικτο και ακριβές εργαλείο, το οποίο επιτρέπει την αξιολόγηση της επίπτωσης σύγχρονων τεχνολογιών και πολιτικών επιλογών στην κατανάλωση καυσίμου επιβατικών οχημάτων. Το συγκεκριμένο εργαλείο χρησιμοποιείται κυρίως για την υποστήριξη και την εκτίμηση της επίπτωσης της μετάβασης από το μέχρι πρότινος ισχύον πρωτόκολλο μέτρησης το οποίο εφαρμόζεται στην έγκριση τύπου κατανάλωσης καυσίμου και εκπομπών CO2 επιβατικών οχημάτων στην Ευρώπη, το NEDC, στο νέο, το οποίο αναπτύχθηκε από τα Ηνωμένα Έθνη και ξεκίνησε να εφαρμόζεται στην ευρωπαϊκή νομοθεσία από το Σεπτέμβριο του 2017, το WLTP. Επιπλέον, το εργαλείο εφαρμόζεται για την εκτίμηση της επίπτωσης των αλλαγών της σχετικής νομοθεσίας οι οποίες αφορούν οχήματα χαμηλών εκπομπών (ηλεκτρικά, κ.α.), και, τέλος, για την αναπαραγωγή δεδομένων εκπομπών υπό πραγματικές συνθήκες οδήγησης, τα οποία συλλέχθησαν μέσω φορητών συστημάτων μέτρησης εκπομπών (PEMS).

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Correction of Test Cycle Tolerances: Evaluating the Impact on CO2 Results

Cited by 21 publications

References 3 publications

Impact of Different Driving Cycles and Operating Conditions on CO2 Emissions and Energy Management Strategies of a Euro-6 Hybrid Electric Vehicle

Impact of Different Driving Cycles and Operating Conditions on CO2 Emissions and Energy Management Strategies of a Euro-6 Hybrid Electric Vehicle

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

Development of a CO2 emissions quantification tool for road transport – connecting detailed vehicle simulation and macro emission tools

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