# 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 3.8.2.2.2

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

For the multiple-filter method by means of equation (7-134):
e PM = ∑ i = 1 N mode ṁ PM i × WF i ∑ i = 1 N mode P i × WF i
(7-134)
Where:
P i engine power for the mode i [kW] calculated by adding to the measured power P meas [kW] the power required to drive auxiliaries P AUX [kW] determined in accordance with equation (6-8) of Annex VI ( P i = P meas + P AUX ).
WFi weighting factor for the mode i [-]
ṁ PM i particulate mass flow rate at mode i [g/h]
N mode number of modes in applicable discrete-mode NRSC
For the single-filter method, the effective weighting factor, WF eff i , for each mode shall be calculated by means of equation (7-135):
WF eff i = m smpldexh i × ṁ eqdexhwet – m smpldex × ṁ eqdexhwet i
(7-135)
Where:
m smpldexh i mass of the diluted exhaust gas sample passed through the particulate sampling filters at mode i [kg]
m smpldexh mass of the diluted exhaust gas sample passed through the particulate sampling filters [kg]
ṁ eqdexhwet i equivalent diluted exhaust gas mass flow rate at mode i [kg/s]
ṁ eqdexhwet – average equivalent diluted exhaust gas mass flow rate [kg/s]
The value of the effective weighting factors shall be within 0,005 (absolute value) of the weighting factors listed in Appendix 1 of Annex XVII.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/3/division/3.8/division/3.8.2/division/3.8.2.2/division/3.8.2.2.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-3/division-3.8/division-3.8.2/division-3.8.2.2/division-3.8.2.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.