# 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 3.1: Calculation of the actual/measured and target power at the wheels


The power and the forces at the wheels from the target and actual/measured speed shall be calculated by applying the following equations:
Fi=f0+f1×Vi+Vi−12+f2×Vi+Vi−124+TM+mr×ai
Pi=Fi×Vi+Vi−13,6×2×0,001
Fmi=f0+f1×Vmi+Vmi−12+f2×Vmi+Vmi−124+TM+mr×ami
Pmi=Fmi×Vmi+Vmi−13,6×2×0,001
ai=Vi−Vi−13,6×ti−ti−1
ami=Vmi−Vmi−13,6×ti−ti−1
where:
Fiis the target driving force during the period from (i – 1) to (i), N;
Fmiis the actual/measured driving force during the period from (i – 1) to (i), N;
Piis the target power during the period from (i – 1) to (i), kW;
Pmiis the actual/measured power during the period from (i – 1) to (i), kW;
f0, f1, f2are the road load coefficients from Sub-Annex 4, N, N/(km/h), N/(km/h)2;
Viis the target speed at time (i); km/h;
Vmiis the actual/measured speed at time (i); km/h;
TMis the test mass of the vehicle, kg;
mris the equivalent effective mass of rotating components in accordance with paragraph 2.5.1. of Sub-Annex 4, kg;
aiis the target acceleration during the period from (i-1) to (i), m/s2;
amiis the actual/measured acceleration during the period from (i – 1) to (i), m/s2;
tiis the time, s.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/6b/division/division/3./division/3.1. (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/6b/division/division-3./division-3.1.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.