Comparison of Real Driving Emissions tests

Abstract

The article presents the issues concerning the specific distance emission test results comparison of the exhaust gases from vehicles with Diesel engines. The tests in real driving conditions included: (in the first stage) the test on the proposed test route, based on the type approval test parameters and (in the second stage) testing in accordance with the European Union guidelines, where the research route was divided into urban, rural and motorway sections. The obtained results – in various test conditions – were used to compare the measured values of specific distance emissions, carbon dioxide, carbon monoxide, hydrocarbons, nitrogen oxides and the particle number. Not performing the road conditions measurements of particulate mass is in line with the requirements of the RDE tests, in which the focus was placed mainly on the assessment of nitrogen oxides and the particle number. The performed tests allowed making a comparison between the specific distance emission test results of exhaust components and the values obtained in the type approval test. These tests were also used to verify the legitimacy of performing full RDE tests and validating the specific distance emission results obtained in the proposed tests.