# 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 8.1.1: Initial load setting


For a chassis dynamometer with coefficient control, the chassis dynamometer power absorption unit shall be adjusted with the arbitrary initial coefficients, Ad, Bd and Cd, of the following equation:
Fd=Ad+ Bdv+ Cdv2where:
Fdis the chassis dynamometer setting load, N;
vis the speed of the chassis dynamometer roller, km/h.
The following are recommended coefficients to be used for the initial load setting:
(a)Ad = 0,5 × At, Bd = 0,2 × Bt, Cd = Ct
for single-axis chassis dynamometers, or
Ad = 0,5 × At, Bd = 0,2 × Bt, Cd = Ct
for dual-axis chassis dynamometers, where, and are the target road load coefficients;
(b)empirical values, such as those used for the setting for a similar type of vehicle.
For a chassis dynamometer of polygonal control, adequate load values at each reference speed shall be set to the chassis dynamometer power absorption unit.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/4/division/division/8./division/8.1./division/8.1.1. (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-8./division-8.1./division-8.1.1.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.