# 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), Division 6.8.1: Determination of delta flat belt or chassis dynamometer coefficients


The delta road load shall be calculated using the following equation:
FDj,Delta = FDj,N – FDj,R
where:
FDj,Deltais the delta road load at reference speed j, N;
FDj,Nis the corrected resistance measured on the flat belt or chassis dynamometer at reference speed j calculated in accordance with paragraph 6.7.1. for vehicle N, N;
FDj,Ris the corrected resistance of the reference vehicle measured on the flat belt or chassis dynamometer at reference speed j calculated in accordance with paragraph 6.7.1. for reference vehicle R, N.
For all calculated FDj,Delta, the coefficients f0,Delta, f1,Delta and f2,Delta in the road load equation shall be calculated with a least squares regression analysis.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/4/division/division/6./division/6.8./division/6.8.1. (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-6./division-6.8./division-6.8.1.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.