# Commission Regulation (EU) 2017/1151 of 1 June 2017 supplementing Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information, amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) No 1230/2012 and repealing Commission Regulation (EC) No 692/2008 (Text with EEA relevance), Division 3.2.1


Mass emissions of gaseous compounds per cycle phase shall be calculated using the following equations:
Mi,phase=Vmix,phase× ρi× KHphase× Ci,phase× 10− 6dphasewhere:
Miis the mass emission of compound i per test or phase, g/km;
Vmixis the volume of the diluted exhaust gas per test or phase expressed in litres per test/phase and corrected to standard conditions (273,15 K (0 °C) and 101,325 kPa);
ρiis the density of compound i in grams per litre at standard temperature and pressure (273,15 K (0 °C) and 101,325 kPa);
KHis a humidity correction factor applicable only to the mass emissions of oxides of nitrogen, NO2 and NOx, per test or phase;
Ciis the concentration of compound i per test or phase in the diluted exhaust gas expressed in ppm and corrected by the amount of compound i contained in the dilution air;
dis the distance driven over the applicable WLTC, km;
nis the number of phases of the applicable WLTC.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/7/division/division/3./division/3.2./division/3.2.1. (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/7/division/division-3./division-3.2./division-3.2.1.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.