Wyniki wyszukiwania - BazTech

1

Cold start emissions from a gasoline engine in RDE tests at different ambient temperatures

Kurtyka Karolina, Pielecha Jacek

Combustion Engines

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2020

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R. 59, nr 2

24--30

EN

The implementation of the 3rd package of the RDE test procedure has extended the test method by considering emissions from a cold start period into the total exhaust emissions from a vehicle. The article presents the research results of exhaust emissions of a vehicle equipped with a gasoline engine. The tests were carried out at two different ambient temperatures, in line with the requirements of the RDE test procedure for passenger cars, meeting the Euro 6d-Temp emissions standard. The obtained results were analyzed, i.e. there were compared the engine and vehicle operating parameters and the values of road exhaust emissions during the cold start at two different ambient temperatures. The summary presents the shares of the cold start phase for each exhaust emission compound in the urban part of the test and the entire RDE test, depending on the ambient temperature (8ºC and 25ºC).

2

The impact of RDE test dynamic parameters on the obtained exhaust emission results

Kurtyka Karolina, Pielecha Jacek

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

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2019

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z. 1/119

15--24

EN

The article presents and discusses the research results on the impact of RDE test dynamic parameters on the emission of selected exhaust components. The measurements were carried out in compliance with the latest legislative procedures applicable to passenger cars. Five passenger cars with similar curb weight were selected for the tests inreal traffic conditions. All tests were performed on the same research route, which includes urban, rural and motorway conditions. The obtained results were analyzed of RDE procedure’s requirements and the Euro 6c toxicity standard. Then the values of dynamic parameters of all tests were compared (relative positive acceleration and 95th percentile of V·a+) and their effect on the obtained emission results was determined. As a summary, the correlations between the on-road exhaust emission and dynamic parameters were defined.

PL

W artykule przedstawiono i omówiono wyniki badań wpływu parametrów dynamicznych testu RDE na emisję wybranych składników spalin. Badania przeprowadzono zgodnie z najnowszymi procedurami legislacyjnymi odnoszącymi się do samochodów osobowych. Do przejazdów w rzeczywistych warunkach ruchu drogowego wybrano 5 samochodów osobowych, które charakteryzowały się zbliżoną masą własną. Otrzymane wyniki przeanalizowano pod kątem ich zgodności z wymogami procedury RDE oraz normy toksyczności Euro 6. Następnie porównano wartości warunków dynamicznych wszystkich przejazdów (względnego przyspieszenia dodatniego i 95-procentowego centyla iloczynu prędkości i dodatniego przyspieszenia) oraz określono ich wpływ na uzyskiwane wyniki emisji spalin. Jako podsumowanie uzyskanych porównań wyznaczono korelacje między warunkami dynamicznymi i emisją wybranych składników spalin.

3

Cold start emissions of passenger cars with gasoline and diesel engines in Real Driving Emissions tests

Pielecha Jacek, Merkisz Jerzy, Kurtyka Karolina, Skobiej Kinga

Combustion Engines

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2019

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R. 58, nr 4

160--168

EN

Modernization of passenger cars and constant development of existing legislation lead to a reduction of exhaust emissions from these vehicles. In accordance with package 3 of the RDE test procedure, the European Commission has extended testing methods by including exhaust emissions during a cold start. The article compares the research results on the impact of ambient temperature during the cold start of spark-ignition and compression-ignition engines in road emission tests. The tests were carried out in line with the requirements of the RDE test procedure for passenger cars meeting the Euro 6d-Temp emissions standard. The obtained results were analyzed, i.e. there were compared the engine and vehicle operation parameters and the values of road exhaust emissions, during the cold start of gasoline and diesel engines at the ambient temperature of approximately 25°C. The summary presents the share of cold start phase of a passenger car (at the ambient temperature of around 25°C) for each exhaust emission compound in the urban part of the test, and in the entire RDE test, depending on the engine type used.