I höst blir det slut på utsläppsfusket

The New European Driving Cycle (NEDC) is a driving cycle, last updated in 1997, designed to assess the emission levels of car engines and fuel economy in passenger cars (which excludes light trucks and commercial vehicles). It is also referred to as MVEG cycle (Motor Vehicle Emissions Group). The NEDC, which is supposed to represent the typical usage of a car in Europe, is repeatedly criticised for delivering economy-figures which are unachievable in reality. It consists of four repeated ECE-15 urban driving cycles (UDC) and one Extra-Urban driving cycle (EUDC). The test procedure is defined in UNECE R101 for the measurement of CO2 and fuel consumption and/or the measurement of electric energy consumption and electric range in hybrid and fully electric M1 and N1 vehicles, and UNECE R83 for the measurement of emission of pollutants of M, N1 and M2 vehicles. It is maintained by the UNECE World Forum for Harmonization of Vehicle Regulations (WP.29), which also works on its successor, the Worldwide harmonized Light vehicles Test Procedures (WLTP). Although originally designed for petrol-based road vehicles, the driving cycle is now also used for diesel vehicles and to estimate the electric power consumption and driving range of hybrid and battery electric vehicles.

Worldwide Harmonized Light-Duty Vehicles Test Procedure, WLTP, är en internationell testmetod för fordon motsvarande personbil och lätt lastbil avsedd för laboratorietest. Den trädde i kraft 2017 och ersatte då NEDC, New European Driving Cycle. Proceduren är framtagen under ledning av europeiska FN-kommissionen FN:s ekonomiska kommission för Europa. Den fokuserar på harmoniserade tester för att jämföra koldioxidutsläpp, bränsleförbrukning, miljöfarliga utsläpp och räckvidd. Den har en speciellt framtagen körsekvens, WLTP-körcykel, som belastar bilen i olika temperaturer samt simulerar olika terrängförhållanden och trafikförhållanden.