# 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 3.1: General requirements


Carbon monoxide (CO)ρ=1,25g/l
Carbon dioxide (CO2)ρ=1,964g/l
Hydrocarbons:
for petrol (E10) (C1H1,93 O0,033)ρ=0,646g/l
for diesel (B7) (C1H1,86O0,007)ρ=0,625g/l
for LPG (C1H2,525)ρ=0,649g/l
for NG/biomethane (CH4)ρ=0,716g/l
for ethanol (E85) (C1H2,74O0,385)ρ=0,934g/l
Nitrogen oxides (NOx)ρ=2,05g/l
The density for NMHC mass calculations shall be equal to that of total hydrocarbons at 273,15 K (0 °C) and 101,325 kPa, and is fuel-dependent. The density for propane mass calculations (see paragraph 3.5. in Sub-Annex 5) is 1,967 g/l at standard conditions.
If a fuel type is not listed in this paragraph, the density of that fuel shall be calculated using the equation given in paragraph 3.1.3. of this Sub-Annex.
ρTHC=MWC+HC× MWH+OC× MWOVM
where:
ρTHCis the density of total hydrocarbons and non-methane hydrocarbons, g/l;
MWCis the molar mass of carbon (12,011 g/mol);
MWHis the molar mass of hydrogen (1,008 g/mol);
MWOis the molar mass of oxygen (15,999 g/mol);
VMis the molar volume of an ideal gas at 273,15 K (0°C) and 101,325 kPa (22,413 l/mol);
H/Cis the hydrogen to carbon ratio for a specific fuel CXHYOZ;
O/Cis the oxygen to carbon ratio for a specific fuel CXHYOZ.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/7/division/division/3./division/3.1. (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/7/division/division-3./division-3.1.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.