These values correspond to tailpipe emissions of 90–105 g CO2/km for private vehicles and 175–195 g CO2/km for company cars compared to only 37–39 g CO2/km in WLTP type approval. The average real-world fuel consumption of PHEVs in Europe is 4.0–4.4 L/100 km for private vehicles and 7.6–8.4 L/100 km for company cars compared to an average of 1.6–1.7 L/100 km in WLTP type approval. The real-world fuel consumption of PHEVs in Europe is on average three to five times higher than WLTP type-approval values. This study presents an analysis of the average real-world fuel consumption and electric driving share of about 9,000 private and company car PHEVs in Europe, with an emphasis on Worldwide Harmonized Light Vehicles Test Procedure (WLTP) type-approved vehicle models. Earlier studies on the real-world usage of PHEVs certified under the New European Driving Cycle (NEDC) have shown that those vehicle models are driven much less on electricity than the type-approval procedure assumes. The potential of plug-in hybrid electric vehicles (PHEVs) to reduce fuel consumption and global greenhouse gas emissions depends on how much they are effectively driven on electricity.
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