초록 열기/닫기 버튼

Heavy-duty diesel vehicles currently undergo engine exhaust gas certification tests using engine dynamometers due to practical constraints with in-use vehicles. However, the utilization of Portable Emission Measurement Systems (PEMS) has made Real-Driving Emission (RDE) tests feasible for on-road driving emissions. The regulated RDE test method has been introduced and implemented as an in-service conformity verification inspection method for heavy-duty diesel vehicles. This study analyzes the changes in NOx emissions when calculating emission levels according to the recently revised RDE test method compared to the previous Euro 6 Step C method, using defect verification HDV-RDE test data from domestic in-use vehicles. Data was collected from 16 vehicles of the same model, with two from each of the M2, N2, M3, and N3 categories. NOx emissions were calculated using the Moving Averaging Window (MAW) analysis method.