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Exhaust Emissions from Two Euro 6d Diesel Passenger Cars Tested at +23°C and at -7°C Under Laboratory Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on September 15, 2020 by SAE International in United States
The aim of this paper is to analyse the results of emissions of harmful substances in exhaust gases, CO2 emission and fuel consumption of passenger cars equipped with compression-ignition engines that meet the emission Euro 6d standards. Research was performed according to the current EU Regulation 2017/1151, which describes the test methods of exhaust emission from passenger cars. Emission testing was performed on a chassis dynamometer, within a climatic chamber, at two different ambient temperatures: 23°C (type 1 test) and -7°C (type 6 test - currently not required for this engine type according to EU legislative requirements). To set the load on chassis dynamometer (F0, F1, F2), fixed run method was use. The exhaust gas components limited according to the Euro 6d standards were analysed: CO (carbon monoxide), THC (hydrocarbons), NOx ( nitrogen oxides) and the number and mass of solid particles (PN, PM) and additional components CO2 (carbon dioxide), NH3 (ammonia), NO (nitrogen oxide) and NO2 (nitrogen dioxide). As the full applicable legislative procedure was applied, the REESS charge balance (RCB) was measured during the test, to determine whether CO2 correction was required. In addition, according to Commission Regulation (EU) 2018/1832, each CO2 result was corrected for the target speed and distance. The results revealed variable emissions behaviour as a response to ambient temperature. Some considerations of the powertrain’s warmup behaviour over the 30-minute, 23-km test cycle and the impact on exhaust emissions are briefly discussed.