# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Division 6.3.5: Engine cycle work

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

The calculation of reference and actual cycle work (see point 7.8.3.4) shall be based upon engine power in accordance with point 6.3.1. In this case, P f and P r of equation (6-7) are zero, and P equals P m.
If auxiliaries/equipment are installed in accordance with points 6.3.2 and/or 6.3.3, the power absorbed by them shall be used to correct each instantaneous cycle power value P m,i, by means of equation (6-8):
P i = P m,i – P f,i + P r,i
(6-7)
P AUX = P r,i – P f,i
(6-8)
Where:
P m,i is the measured engine power, kW
P f,i is the power absorbed by auxiliaries/equipment to be fitted for the test but that were not installed, kW
P r,i is the power absorbed by auxiliaries/equipment to be removed for the test but that were installed, kW.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VI/division/6/division/6.3/division/6.3.5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VI/division-6/division-6.3/division-6.3.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.