Real drive cycles analysis by ordered power methodology applied to fuel consumption, CO2, NOx and PM emissions estimation

doi:10.1007/s11783-020-1296-z

Front. Environ. Sci. Eng.

2021, Vol. 15

Issue (1) : 4 https://doi.org/10.1007/s11783-020-1296-z

RESEARCH ARTICLE

Real drive cycles analysis by ordered power methodology applied to fuel consumption, CO₂, NO_x and PM emissions estimation

Pol Masclans Abelló¹, Vicente Medina Iglesias^1,², M. Antonia de los Santos López^1,³, Jesús Álvarez-Flórez^1,²(

)

¹. Center for Engines and Heat Installation Research (CREMIT-UPC). Universitat Politècnica de Catalunya – BarcelonaTech. Av. Diagonal 547 (ETSEIB) 08028 Barcelona, Spain
². Department of Thermal Machinery of Universitat Politècnica de Catalunya- BarcelonaTech and CREMIT-UPC. – BarcelonaTech. Av. Diagonal 547 (ETSEIB) 08028 Barcelona, Spain
³. Department of Mechanical Engineering of Universitat Politècnica de Catalunya- BarcelonaTech and CREMIT-UPC. – BarcelonaTech. Av. Diagonal 547 (ETSEIB) 08028 Barcelona, Spain

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Abstract

• New method named CAbOP is presented based on ordering data according to power.

• Three emission models are used and their emission results compared.

• Emissions data are analyzed in real driving cycles under CAbOP criteria.

• Methodology to collect data and reconstruct lost data in real urban driving cycles.

In this work three fuel consumption and exhaust emission models, ADVISOR, VT-MICRO and the European Environmental Agency Emission factors, have been used to obtain fuel consumption (FC) and exhaust emissions. These models have been used at micro-scale, using the two signal treatment methods presented. The manuscript presents: 1) a methodology to collect data in real urban driving cycles, 2) an estimation of FC and tailpipe emissions using some available models in literature, and 3) a novel analysis of the results based on delivered wheel power. The results include Fuel Consumption (FC), CO₂, NO_x and PM₁₀ emissions, which are derived from the three simulators. In the first part of the paper we present a new procedure for incomplete drive cycle data treatment, which is necessary for real drive cycle acquisition in high density cities. Then the models are used to obtain second by second FC and exhaust emissions. Finally, a new methodology named Cycle Analysis by Ordered Power (CAbOP) is presented and used to compare the results. This method consists in the re-ordering of time dependant data, considering the wheel mechanical power domain instead of the standard time domain. This new strategy allows the 5 situations in drive cycles to be clearly visualized: hard breaking zone, slowdowns, idle or stop zone, sustained speed zone and acceleration zone. The complete methodology is applied in two real drive cycles surveyed in Barcelona (Spain) and the results are compared with a standardized WLTC urban cycle.

Keywords Cycle Analysis by Ordered Power (CAbOP) Micro and macro models Real drive cycle NO_x/PM₁₀/CO₂ emissions Wheel mechanical power domain Worldwide Harmonized Light-Duty Vehicles Test Cycle (WLTC)

Corresponding Author(s): Jesús Álvarez-Flórez

Issue Date: 20 July 2020

Cite this article:

Pol Masclans Abelló,Vicente Medina Iglesias,M. Antonia de los Santos López, et al. Real drive cycles analysis by ordered power methodology applied to fuel consumption, CO₂, NO_x and PM emissions estimation[J]. Front. Environ. Sci. Eng., 2021, 15(1): 4.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-020-1296-z
https://academic.hep.com.cn/fese/EN/Y2021/V15/I1/4

Tab.1 Comparison of different available simulators

Tab.2 Cycles basic statistics

Fig.1 Power delivered per fraction of the elapsed time.

Fig.2 Power delivered in each cycle ordered by ascending value.

Fig.3 Model of the implemented methodology, showing the 3 different stages, as well as the multiple options offered regarding data treatment and simulation models.

Fig.4 (a) Estimated fuel consumption for each simulator. (b) NO_x emissions in Diesel vehicles. (c) PM emissions in Diesel vehicles.

Fig.5 (a) Second by second fuel consumption in C1, (b) Instant accelerations and Speeds in C1 CAbOP.

Fig.6 Fuel consumption in each simulation comparison using CAbOP.

Fig.7 NO_x emissions in each simulation comparison using CAbOP.

Fig.8 PM emissions in each simulation comparison using CAbOP.

Fig.9 Percentage of the relative time spent in each of the driving zones compared to the relative emissions of NO_x.

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