1. Aim of the CO2MPAS model.

CO₂MPAS is a backward-calculation longitudinal-dynamics CO₂ and fuel-consumption simulator for light-duty M1 & N1 vehicles (cars and vans), specially crafted to calculate CO₂ emissions of a vehicle over the NEDC test by using the results of an official WLTP test, according to the EU legislation.

The CO₂MPAS model uses as input data measured during a WLTP test of a given vehicle and predicts the CO₂ emission value that the same vehicle would have on a NEDC test.

Two main scenarios are foreseen in the use of CO₂MPAS:

• WLTP interpolation family: users provide road loads, mass, WLTP bag results and time series for both WLTP-H and WLTP-L, and road loads, masses, and NEDC declared CO₂ for both NEDC-H and NEDC-L. In this case, CO₂MPAS predicts NEDC-H based on WLTP-H and NEDC-L based on WLTP-L test, respectively.
• Individual vehicle use: users provide road loads, masses, WLTP bag results and time series for WLTP-H, and road loads, mass, and NEDC declared CO₂ for NEDC-H. In this case, CO₂MPAS predicts NEDC-H based on WLTP-H.

Please be aware of the existing known limitations of the model.

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