# 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 2.3.2.2: Calculation of the particulate mass flow rate

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

The particulate emission flow rate over the cycle q mPM [g/h] shall be calculated by means of equations (7-53), (7-56), (7-57) or (7-58):
(a) For the single-filter method
q m PM = m f m sep × q m edf – × 3600 1000
(7-53)
q m edf – = ∑ i = 1 N q m edf i × WF i
(7-54)
m sep = ∑ i = 1 N m sep i
(7-55)
Where:
qm PM particulate mass flow rate [g/h]
m f particulate mass sampled over the cycle [mg]
q m edf – average equivalent diluted exhaust gas mass flow rate on wet basis [kg/s]
qm edf i equivalent diluted exhaust gas mass flow rate on wet basis at mode i [kg/s]
WFi weighting factor for the mode i [-]
m sep mass of diluted exhaust gas passing the particulate collection filters [kg]
m sep i mass of diluted exhaust gas sample passed through the particulate sampling filter at mode i [kg]
N number of measurements [-]
(b) For the multiple-filter method
q m PM i = m f i m sep i × q m edf i × 3600 1000
(7-56)
Where:
qm PM i particulate mass flow rate for the mode i [g/h]
m f i particulate sample mass collected at mode i [mg]
qm edf i equivalent diluted exhaust gas mass flow rate on wet basis at mode i [kg/s]
m sep i mass of diluted exhaust gas sample passed through the particulate sampling filter at mode i [kg]
The PM mass is determined over the test cycle by summation of the average values of the individual modes i during the sampling period.
The particulate mass flow rate qm PM [g/h] or qm PM i [g/h] may be background corrected as follows:
(c) For the single-filter method
q m PM = m f m sep − m f,d m d × ∑ i = 1 N 1 − 1 D i × WF i × q m edf – × 3600 1000
(7-57)
Where:
qm PM particulate mass flow rate [g/h]
m f particulate sample mass collected [mg]
m sep mass of diluted exhaust gas sample passed through the particulate sampling filter [kg]
m f,d particulate sample mass of the dilution air collected [mg]
m d mass of the dilution air sample passed through the particulate sampling filters [kg]
Di dilution factor at mode i [see equation (7-28) of point 2.2.2.2] [-]
WFi weighting factor for the mode i [-]
q m edf – average equivalent diluted exhaust gas mass flow rate on wet basis [kg/s]
(d) For the multiple-filter method
q m PM i = m f i m sep i − m f,d m d × 1 − 1 D × q m edf i – × 3600 1000
(7-58)
Where:
qm PM i particulate mass flow rate at mode i [g/h]
m f i particulate sample mass collected at mode i [mg]
m sep i mass of diluted exhaust gas sample passed through the particulate sampling filter at mode i [kg]
m f,d particulate sample mass of the dilution air collected [mg]
m d mass of the dilution air sample passed through the particulate sampling filters [kg]
D dilution factor [see equation (7-28) of point 2.2.2.2] [-]
q medf i equivalent diluted exhaust gas mass flow rate on wet basis at mode i [kg/s]
If more than one measurement is made, m f,d/m d shall be replaced with m f,d ∕ m d – .

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/2/division/2.3/division/2.3.2/division/2.3.2.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.3/division-2.3.2/division-2.3.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.