Investigation of processes in the WLTC test of a passenger car with a diesel engine

• Autorzy: Andrych-Zalewska Monika

Identyfikatory

DOI

10.19206/CE-168328

• Języki publikacji: EN

Abstrakty

EN

The test results and their analysis was discussed in this article. The tests were carried out in accordance with the WLTP (Worldwide Light Duty Test Procedure), on a passenger car with a compression ignition engine. The analysis was conducted doe the following variables: vehicle speed, exhaust emission rate and fuel consumption volumetric rate. The subject of the research are exhaust emission components that are harmful to the health of living organisms: carbon monoxide, hydrocarbons and nitrogen oxides, as well as greenhouse gases. The research results have shown a very large range of values for carbon monoxide, organic compounds and nitrogen oxides emission rate characteristics. The average distance-specific emissions values of carbon monoxide, organic compounds and nitrogen oxides were very small and were in line with the Euro 6 requirements within a large margin. Correlation studies of the measured variables were conducted - between vehicle speed and exhaust emission rate as well as volumetric fuel consumption rates, and between exhaust emission rates and volumetric fuel consumption rates. The correlation studies have shown that the highest coefficient of determination in relation to vehicle speed was found for volumetric fuel consumption and carbon dioxide emission rate, and the weakest correlation for carbon monoxide emission rate and nitrogen oxides emission rate. The correlation between the rate of volumetric fuel consumption and carbon dioxide emission, as well as for hydrocarbon emission and methane emission rates, was found to be the strongest. The carbon monoxide emission rate was the least correlated with all the other measured variables. Dimensionless statistical characteristics of the measured variables were determined, such as: extreme values, range, mean value, median, standard deviation, kurtosis, skewness and coefficient of variation. For all of them, the mean value was much greater than the median, and the standard deviation was greater still, than both of those values. The numerical distributions for the values of exhaust emission rate and volumetric fuel consumption turned out to be leptokurtic and have right-sided asymmetry. The coefficient of variation analysis made it possible to assess that the most dynamic properties could be observed in organic compounds emission rate, followed by carbon monoxide and nitrogen oxides emission rates, and finally - the vehicle speed. Histograms of the examined processes were determined. The vehicle speed histogram was characterized by relative uniformity apart from the dominance of the idle speed. Histograms of exhaust emission rate variables were most frequently dominated by small values. The zero values occurred less frequently for the fuel consumption volumetric rate histogram. Based on the conducted research and the obtained data, a set of conclusions was drawn.

Słowa kluczowe

EN

diesel engine; exhaust emission; WLTC test

PL

silnik Diesla; emisja spalin; test WLTC

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Combustion Engines
• Rocznik: 2023
• Tom: R. 62, nr 3
• Strony: 52--62
• Opis fizyczny: Bibliogr. 17 poz., wykr.

Twórcy

autor

Andrych-Zalewska Monika

• Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Poland

• https://orcid.org/0000-0001-6676-2508

Bibliografia

• [1] Blanco-Rodriguez D, Vagnoni G, Holderbaum B. EU6 C-segment diesel vehicles, a challenging segment to meet RDE and WLTP requirements. IFAC-PapersOnLine. 2016; 49(11):649-656. https://doi.org/10.1016/j.ifacol.2016.08.094
• [2] Chacko S, Alonso C, Solimene A, Simon J, Kallifronas DP. Fuel economy benefit of active grille shutters for real world, worldwide harmonized light vehicles test procedure, and real driving emission cycles. SAE Technical Paper 2022-01-5013. 2021. https://doi.org/10.4271/2022-01-5013
• [3] Chłopek Z, Biedrzycki J, Lasocki J, Wójcik P. Emission intensity in various conditions of operation of the automotive internal combustion engine. Transport. 2019;34(4):490-498. https://doi.org/10.3846/transport.2019.11294
• [4] Fuć P, Siedlecki M, Szymlet N, Sokolnicka B. Exhaust emissions from a Euro 6c compliant pc vehicle in real operating conditions. Journal of KONBiN. 2019;49(4):421-440. https://doi.org/10.2478/jok-2019-0094
• [5] Giakoumis ES, Zachiotis AT. Investigation of a diesel-engined vehicle’s performance and emissions during the WLTC driving cycle - comparison with the NEDC. Energies. 2017;10(2):240. https://doi.org/10.3390/en10020240
• [6] ISO8178. Emission test cycles. https://dieselnet.com/standards/cycles/iso8178.php (accessed on 2022.10.02).
• [7] Kaźmierczak A, Matla J. Method of verifying the emission level of the exhaust components of a special vehicle in relation to EURO III standard in road conditions. Combustion Engines. 2022;189(2):89-93. https://doi.org/10.19206/CE-143485
• [8] Kneba Z, Stepanenko D, Rudnicki J. Numerical methodology for evaluation the combustion and emissions characteristics on WLTP in the light duty dual-fuel diesel vehicle. Combustion Engines. 2022;189(2):94-102. https://doi.org/10.19206/CE-143334
• [9] Koszałka G, Szczotka A, Suchecki A. Comparison of fuel consumption and exhaust emissions in WLTP and NEDC procedures. Combustion Engines. 2019;179(4):186-191. https://doi.org/10.19206/CE-2019-431
• [10] Lane DM, Scott D, Hebl M, Guerra R, Osherson D, Zimmer H. Introduction to statistics - open textbook library (umn.edu). 2023. https://onlinestatbook.com/Online_Statistics_Education.pdf
• [11] Ligterink NE, van Mensch P, Cuelenaere RFA. NEDC - WLTP comparative testing. Report number: TNO 2016 R11285. October 2016. https://doi.org/10.13140/RG.2.2.19039.66723
• [12] Morales V. Exhaust emissions of in-use Euro 6d-TEMP and Euro 6d vehicles in WLTP and RDE conditions, a comparison. SAE Technical Paper 2022-01-1023. 2023. https://doi.org/10.4271/2022-01-1023
• [13] Otnes RK, Enochson L. Applied time series analysis: basic techniques. John Wiley & Sons, Inc. 1978.
• [14] Sileghem L, Bosteels D, May J, Favre C, Verhelst S. Analysis of vehicle emission measurements on the new WLTC, the NEDC and the CADC. Transportat Res D-Tr E. 2014;32:70-85. https://doi.org/10.1016/j.trd.2014.07.008
• [15] Theodoros G, Giorgio M., Heinz S. Analysis of WLTP typical driving conditions that affect non exhaust particle emissions. EUR 28273 EN. Luxembourg. Publications Office of the European Union 2016. JRC103870. https://publications.jrc.ec.europa.eu/repository/handle/JRC103870
• [16] Tsiakmakis S, Fontaras G, Cubito C, Pavlovic J. Anagnostopoulos K, Ciuffo B. From NEDC to WLTP: effect on the type-approval CO2 emissions of light-duty vehicles. EUR 28724 EN. Publications Office of the European Union, Luxembourg 2017, JRC107662. https://doi.org/10.2760/93419
• [17] Worldwide emission standards. Passenger cars and light duty vehicles. Delphi. Innovation for the real world 2020/2021.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).