Commission Implementing Regulation (EU) 2017/1153Show full title

4. CALCULATION OF THE NEDC CO₂ VALUES AND FUEL CONSUMPTION VALUES TO BE ATTRIBUTED TO INDIVIDUAL M1 VEHICLES

The manufacturer shall calculate the (phase-specific and combined) NEDC CO₂ values and the fuel consumption values to be attributed to individual passenger cars in accordance with points 4.1 and 4.2 and record those values in the certificates of conformity.

The provisions on rounding set out in point 1.3 of Sub-Annex 7 to Annex XXI to Regulation (EU) 2017/1151 shall apply.

4.1. Determination of the NEDC CO₂ values in the case of a WLTP interpolation family based on vehicle H

Where the CO₂ emissions of the WLTP interpolation family are determined by reference to vehicle H only in accordance with point 1.2.3.1 of Sub-Annex 6 to Annex XXI to Regulation (EU) 2017/1151, the NEDC CO₂ value to be recorded in the certificates of conformity of the vehicles belonging to that family shall be the NEDC CO₂ emissions determined in accordance with point 3.2 of this Annex and recorded in the type-approval certificate of the vehicle H in question.

4.2. Determination of the NEDC CO₂ value in the case of a WLTP interpolation family based on vehicle L and vehicle H

4.2.1. Road load calculation of an individual vehicle

4.2.1.1. Mass of the relevant vehicle

The NEDC reference mass of the individual vehicle (RM_n,ind) shall be determined as follows:

Where: MRO _ind is the mass in running order as defined in Article 3(d) of Regulation (EC) No 443/2009 of the individual vehicle.

The mass to be used for the calculation of the NEDC CO₂ values of the individual vehicle shall be the inertia value set out in Table 3 of Annex 4a to UN/ECE Regulation No 83 which is equivalent to the reference mass determined in accordance with this point and referred to as. TM_n,ind.

4.2.1.2. Rolling resistance of the individual vehicle

The tyre rolling resistance values determined in accordance with point 3.2.3.2.2.2 of sub-Annex 7 to Annex XXI to Regulation (EU) 2017/1151 shall be used for the purpose of the interpolation of the NEDC CO₂ value of the individual vehicle.

4.2.1.3. Aerodynamic drag of an individual vehicle

The aerodynamic drag of the individual vehicle shall be calculated by considering the difference in aerodynamic drag between an individual vehicle and vehicle L, due to a difference in body shape (m²):

Where:

C_d

is the aerodynamic drag coefficient;

A_f

is the frontal area of the vehicle, m².

The type-approval authority or, where applicable, the technical service shall verify if the wind tunnel facility referred to in 3.2.3.2.2.3. in Sub-Annex 7 to Annex XXI to Regulation (EU) 2017/1151 is qualified to accurately determine the Δ(C_d ×A_f) for body shapes that differ between vehicle L and H. If the wind tunnel facility is not qualified, the for vehicle H shall apply for the individual vehicle.

If vehicles L and H have the same body shape, the value of for the interpolation method shall be set to zero.

4.2.1.4. Calculation of the road load for an individual vehicle in a WLTP interpolation family

The road load coefficients F_0,n, F_1,n and F_2,n for test vehicles H and L determined in accordance with point 2.3.8 are referred to as F_0n,H, F_1n,H and F_2n,H and F_0n,L, F_1n,L and F_2n,L respectively.

The road load coefficients f_0n,ind, f_1n,ind and f_2n,ind for an individual vehicle shall be calculated in accordance with the following formula:

Formula 1

Or, if Formula 2 shall apply:

Formula 2

or, if = 0, Formula 3 shall apply:

Formula 3

where:

4.2.1.5. Calculation of cycle energy demand

The cycle energy demand of the applicable NEDC E_k,n and the energy demand for all applicable cycle phases E_k,p,n applicable for individual vehicles in the WLTP interpolation family shall be calculated according to the procedure in paragraph 5 of Sub-Annex 7 to Annex XXI to Regulation (EU) 2017/1151, for the following sets k of road load coefficients and masses:

k = 1

:

(test vehicle L)

k = 2

:

(test vehicle H)

k = 3

:

(an individual vehicle in the WLTP interpolation family)

In case the chassis dynamometer coefficients specified in Table 3 of Annex 4a of UN/ECE Regulation No 83 are applied, the following formulae shall be used:

4.2.1.6. Calculation of the NEDC CO₂ value for an individual vehicle by the CO₂ interpolation method

For each cycle phase p of the NEDC applicable for individual vehicles in the WLTP interpolation family, the contribution to the total mass of CO₂ for an individual vehicle shall be calculated as follows:

The mass of CO₂ emissions, g/km, attributed to an individual vehicle of the WLTP interpolation family shall be calculated as follows:

The terms E_1,p,n, E_2,p,n, E_3,p,n, and E_1,n, E_2,n, E_3,n respectively are defined in paragraph 4.2.1.5.

4.2.1.7. Calculation of the NEDC fuel consumption value for an individual vehicle by the interpolation method

For each cycle phase p of the NEDC applicable for individual vehicles in the WLTP interpolation family, the fuel consumption, l/100km, shall be calculated as follows:

The fuel consumption, l/100km, of the complete cycle for an individual vehicle of the WLTP interpolation family shall be calculated as follows:

The terms E_1,p,n, E_2,p,n, E_3,p,n, and E_1,n, E_2,n, E_3,n respectively are defined in paragraph 4.2.1.5.