# Commission Regulation (EU) 2017/2400 of 12 December 2017 implementing Regulation (EC) No 595/2009 of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles and amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011 (Text with EEA relevance), Division 5.3.1: Specific fuel consumption figures for WHTC correction factor

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

The specific fuel consumption figures needed for the WHTC correction factor shall be calculated from the actual measured values for the hotstart WHTC recorded in accordance with paragraph 4.3.3 as follows:
SFCmeas, Urban = Σ FCmeas, WHTC-Urban / Wact, WHTC-Urban
SFCmeas, Rural = Σ FCmeas, WHTC- Rural / Wact, WHTC- Rural
SFCmeas, MW = Σ FCmeas, WHTC-MW / Wact, WHTC-M)
where:
SFCmeas, i Specific fuel consumption over the WHTC-sub-cycle i [g/kWh]
Σ FCmeas, i Total fuel mass consumed by the engine over the WHTC-sub-cycle i [g] determined in accordance with paragraph 5.2
Wact, i Total engine work over the WHTC sub-cycle i [kWh] determined in accordance with paragraph 5.1
The 3 different sub-cycles of the WHTC – urban, rural and motorway – shall be defined as follows:
(1) urban: from cycle start to ≤ 900 seconds from cycle start
(2) rural: from > 900 seconds to ≤ 1 380 seconds from cycle start
(3) motorway (MW): from > 1 380 seconds from cycle start to cycle end

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Source: https://www.legislation.gov.uk/eur/2017/2400/annex/V/division/5/division/5.3/division/5.3.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-2400/annex-V/division-5/division-5.3/division-5.3.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.