Division 5.2: Calculation of integrated fuel consumption - 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)

Any recorded negative values for the fuel consumption shall be used directly and shall not be set equal to zero for the calculations of the integrated value.

The total fuel mass consumed by the engine over a complete testcycle or over each WHTC-sub-cycle shall be determined by integrating recorded values of fuel massflow in accordance with the following formula:

where:

Σ FC_{meas, i}

total fuel mass consumed by the engine over the time period from t₀ to t₁

t₀

time at the start of the time period

t₁

time at the end of the time period

n

number of recorded values over the time period from t₀ to t₁

mf_fuel,_{k [0 … n]}

recorded fuel massflow values over the time period from t₀ to t₁ in chronological order, where k runs from 0 at t₀ to n at t₁

h

interval width between two adjacent recorded values defined by $h = \frac{t_{1} - t_{0}}{n}$

Division 5.2 Calculation of integrated fuel consumption