# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Division 2.3.1.1.2: Calculation based on dilution ratio

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

The particulate emission over the cycle m PM [g] shall be calculated by means of equation (7-44):
m PM = m f m sep × m edf 1000
(7-44)
Where:
m f particulate mass sampled over the cycle [mg]
m sep mass of diluted exhaust gas passing the particulate collection filters [kg]
m edf mass of equivalent diluted exhaust gas over the cycle [kg]
The total mass of equivalent diluted exhaust gas mass over the cycle m edf [kg] shall be determined by means of equation (7-45):
m edf = 1 f × ∑ i = 1 N q m edf, i
(7-45)
With:
q m edf, i = q m ew, i × r d, i
(7-46)
r d, i = q m dew, i q m dew, i − q m dw, i
(7-47)
Where:
qm edf, i instantaneous equivalent diluted exhaust gas mass flow rate [kg/s]
qm ew, i instantaneous exhaust gas mass flow rate on a wet basis [kg/s]
r d, i instantaneous dilution ratio [-]
qm dew, i instantaneous diluted exhaust gas mass flow rate on a wet basis [kg/s]
qm dw,i instantaneous dilution air mass flow rate [kg/s]
ƒ data sampling rate [Hz]
N number of measurements [-]

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/2/division/2.3/division/2.3.1/division/2.3.1.1/division/2.3.1.1.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.3/division-2.3.1/division-2.3.1.1/division-2.3.1.1.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.