# 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 7.2: Calculation of the measured fuel consumption

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

The measured fuel flow shall be integrated for the same time span as the simulated fuel consumption. The measured fuel consumption for the total test shall be calculated as follows:
FC m = ∑ end t = 0 FC m t : fs VT work m
where:
FC m Fuel consumption measured by integrating fuel mass flow over the complete fuel consumption measurement phase [g/kWh]
FC m(t) Instantaneous fuel mass flow measured during the fuel consumption measurement phase [g/s]
fs Sampling rate [Hz]
VT work m Verification test work at the wheel calculated from the measured wheel torque and wheel rotational speeds over the complete fuel consumption measurement phase [kWh]
VT work m = ∑ t = 0 end ∑ 2 i = 1 P wheel-i-measured,t 3600 × fs
P wheel-i-measured,t Positive power at the left (i = l) and right (i = 2) wheel calculated from the measured wheel torque and wheel rotational speeds at time step t where only power values greater zero are considered
P wheel-i-measured,t = 0,001 × torque i × rpm i × 2 × π 60
Torque i instantaneously measured torque at the wheel ‘ i ’ in time step ‘ t ’ [Nm]
rpm i instantaneously measured rotational speed at the wheel ‘i’ in time step ‘t’ [min – 1 ]
The measured fuel consumption values shall be corrected for the net calorific value (NCV) as set out in point 3 of Annex V to calculate the verification test results.
FC m,corr = FC m × NCV meas NCV std
where:
NCV meas NCV of the fuel used in the verification test determined in accordance with point 3.2 of Annex V [MJ/kg]
NCV std Standard NCV in accordance with Table 4 of Annex V [MJ/kg]
FC m,corr Fuel consumption measured by integrating fuel mass over the complete fuel consumption measurement phase corrected for the test fuel NCV [g/kWh]

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Source: https://www.legislation.gov.uk/eur/2017/2400/annex/Xa/division/7/division/7.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-2400/annex-Xa/division-7/division-7.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.