# Commission Regulation (EU) 2017/1151 of 1 June 2017 supplementing Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information, amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) No 1230/2012 and repealing Commission Regulation (EC) No 692/2008 (Text with EEA relevance), Appendix 6

Extent: E+W+S+N.I.

CALCULATION OF THE FINAL RDE EMISSIONS RESULTS
1.
Symbols, Parameters and Units
Index (k) refers to the category (t = total, u = urban, 1-2 = first two phases of the WLTP cycle)
IC k is the distance share of usage of the internal combustion engine for an OVC-HEV over the RDE trip
d ICE,k is the distance driven [km], with the internal combustion engine on for an OVC-HEV over the RDE trip
d EV,k is the distance driven [km], with the internal combustion engine off for an OVC-HEV over the RDE trip
M RDE,k is the final RDE distance-specific mass of gaseous pollutants [mg/km] or particle number [#/km]
m RDE,k is the distance-specific mass of gaseous pollutant [mg/km] or particle number [#/km] emissions, emitted over the complete RDE trip and prior to any correction in accordance with this Appendix
MCO2RDE,kis the distance-specific mass of CO 2 [g/km], emitted over the RDE trip
MCO2WLTC,kis the distance-specific mass of CO 2 [g/km], emitted over the WLTC cycle
MCO2WLTC_CS,kis the distance-specific mass of CO 2 [g/km], emitted over the WLTC cycle for an OVC-HEV vehicle tested on its charge sustaining mode
r k ratio between the CO 2 emissions measured during the RDE test and the WLTP test
RF k is the result evaluation factor calculated for the RDE trip
RF L 1 is the first parameter of the function used to calculate the result evaluation factor
RF L 2 is the second parameter of the function used to calculate the result evaluation factor
2.
Calculation of the Final RDE emissions results
2.1.
Introduction
The trip validity shall be verified in accordance with point 9.2. of Annex IIIA. For the valid trips, the final RDE results are calculated as follows for vehicles with ICE, NOVC-HEV and OVC-HEV.
For the complete RDE trip and for the urban part of the RDE trip (k = t = total, k = u = urban):
M RDE,k = m RDE,k · RF k
The values of the parameter RF L 1 and RF L 2 of the function used to calculate the result evaluation factor are as follows:
Upon the request of the manufacturer and only for type approvals granted before 1 January 2020,
RF L 1 = 1,20 and RF L 2 = 1,25;
in all other cases:
RF L 1 = 1,30 and RF L 2 = 1,50;
The RDE result evaluation factors RF k (k = t = total, k = u = urban) shall be obtained using the functions laid down in point 2.2. for vehicles with ICE and NOVC-HEV, and in point 2.3. for OVC-HEV. These evaluation factors shall be subject to review by the Secretary of State and shall be revised as a result of technical progress. A graphical illustration of the method is provided in Figure App 6.1 below, while the mathematical formulas are found in Table App 6.1:
Figure App 6.1
Function to calculate the result evaluation factor
Table App 6.1
Result evaluation factors calculation
When:
Then the Result evaluation factor RFk is:
Where:
r k ≤ RF L 1
RF k = 1
RF L 1 < r k ≤ RF L 2
RF k = a 1 r k + b 1
a1=RFL2−1RFL2RFL1−RFL2
b 1 = 1 – a 1 RF L 1
r k > RF L 2
RFk=1rk
2.2.
RDE result evaluation factor for vehicles with ICE and NOVC-HEV
The value of the RDE result evaluation factor depends on the ratio r k between the distance specific CO 2 emissions measured during the RDE test and the distance-specific CO 2 emitted by the vehicle over the WLTP test conducted in accordance with Sub-Annex 6 to Annex XXI of this Regulation, obtained from point 12 of the Transparency list 1 of Appendix 5 of Annex II with interpolation between vehicle H and vehicle L (if relevant) as defined in Sub-Annex 7 of Annex XXI, using Test mass and Road load coefficients (F0, F1 & F2) obtained from the Certificate of Conformity for the individual vehicle as defined in Annex IX. For the urban emissions, the relevant phases of the WLTP driving cycle shall be:
a))for ICE vehicles the first two WLTP phases, i.e. the Low and the Medium speed phases,
b))for NOVC-HEVs the whole WLTP driving cycle.
rk=MCO2,RDE,kMCO2,WLTP,k
2.3.
RDE result evaluation factor for OVC-HEV
The value of the RDE result evaluation factor depends on the ratio r k between the distance-specific CO 2 emissions measured during the RDE test and the distance-specific CO 2 emitted by the vehicle over the WLTP test conducted using the Charge Sustaining mode in accordance with Sub-Annex 6 to Annex XXI of this Regulation, obtained from point 12 of the Transparency list 1 of Appendix 5 of Annex II with interpolation between vehicle H and vehicle L (if relevant) as defined in Sub-Annex 7 of Annex XXI, using Test mass and Road load coefficients (F0, F1 & F2) obtained from the Certificate of Conformity for the individual vehicle as defined in Annex IX. The ratio r k is corrected by a ratio reflecting the respective usage of the internal combustion engine during the RDE trip and on the WLTP test, to be conducted using the charge sustaining mode. The formula below shall be subject to review by the Secretary of State and shall be revised as a result of technical progress.
For either the urban or the total driving:
rk=MCO2,RDE,kMCO2,WLTP,k−CS,t×0,85ICk
where IC k is the ratio of the distance driven either in urban or total trip with the combustion engine on divided by the total urban or total trip distance:
ICk=dICE,kdICE,k+dEV,k
With determination of combustion engine operation in accordance with Appendix 4 Paragraph 5.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/IIIA/appendix/6 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-IIIA/appendix-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.