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Division 5.1 Calculation of engine work

United Kingdom

Original text. Later amendments are not shown.

F1Total engine work over a cycle or a defined period shall be determined from the recorded values of engine power determined in accordance with paragraph 3.1.2 of this Annex and paragraphs 6.3.5 and 7.4.8 of Annex 4 to UN/ECE Regulation 49 Rev.06.

The engine work over a complete testcycle or over each WHTC-sub-cycle shall be determined by integrating of recorded values of engine power in accordance with the following formula:

W act,i = 1 2 P 0 + P 1 + P 2 + … + P n − 2 + P n − 1 + 1 2 P n h

where:

Wact, i

  • total engine work 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

    • Pk [0 … n]

  • recorded engine power 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 = t 1 − t 0 n

    • Annotations

    Textual amendments

    F1

    Substituted by Commission Regulation (EU) 2019/318 of 19 February 2019 amending Regulation (EU) 2017/2400 and Directive 2007/46/EC of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles (Text with EEA relevance).