Abstract
This paper presents the results of a preliminary experimental study examining the World Harmonized Light-duty Vehicles Test Procedure (WLTP) and in particular its test cycle – the World Harmonized Light-duty Vehicles Test Cycle (WLTC). Exhaust emission testing was carried out in an advanced, climate-controlled test facility at BOSMAL Automotive Research and Development Institute. In general, testing was carried out in accordance with the demands of current EU legislation: all the vehicles were tested on a chassis dynamometer and the exhaust gas was diluted and sampled using a constant volume sampler. The results indicated limited differences between CO2 emissions over the NEDC and WLTC, but with some exceptions; differences between the WLTC and the FTP-75 were greater. Further work is required to compare the entire WLTP procedure with current EU and US test procedures.
KEYWORDS – exhaust emissions; carbon dioxide (CO2); WLTP test procedure; WLTC test cycle; NEDC; FTP-75.