# 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 4.1.11: Calculation of TC characteristics

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

For each measurement point, the following calculations shall be applied to the measurement data:
The torque ratio of the TC shall be calculated by
μ=Tc,tur−ΔUT,turTc,pum+ΔUT,pum
The speed ratio of the TC shall be calculated by
v=nturnpum
The reference torque at 1 000 rpm shall be calculated by
Tpum1000=Tc,pum−ΔUT,pum×1000rpmnpum2
where:
μTorque ratio of the TC [-]
vSpeed ratio of the TC [-]
Tc,pum Input (pump) torque (corrected) [Nm]
npum Input rotational (pump) speed [rpm]
ntur Output rotational (turbine) speed [rpm]
Tpum1000 Reference torque at 1 000 rpm [Nm]

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Source: https://www.legislation.gov.uk/eur/2017/2400/annex/VI/division/4/division/4.1/division/4.1.11 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-2400/annex-VI/division-4/division-4.1/division-4.1.11
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.