Tests of urban bus specific emissions in terms of currently applicable heavy vehicles operating emission regulations

The article presents a study of a city bus in real operating conditions (RDE) from the perspective of the latest regulations for the assessment of specific emissions compliance for heavy-duty vehicles (Euro VI standard). The object of the research was a serial configuration hybrid drive vehicle. Measurements were made in the real driving conditions in Poznan agglomeration. The latest mobile equipment PEMS was used for the measurements. This article presents the details of the EU 582/2011 Procedure in operational conformity assessment, the methodology of the study was discussed, and the obtained results were presented, both in terms of vehicle operating conditions and engine operation, as well as specific emissions evaluation.