# 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), Appendix 1: Verification of conformity of production for Type 1 test—statistical method


1.
This Appendix describes the procedure to be used to verify the production conformity requirements for the Type 1 test for pollutants/CO 2 , including conformity requirements for PEVs and OVC-HEVs, and to monitor the OBFCM device accuracy.
2.
Measurements of the pollutants specified in Table 2 of Annex I to Regulation (EC) No 715/2007, and the emission of CO 2 shall be carried out on a minimum number of 3 vehicles, and consecutively increase until a pass or fail decision is reached. The OBFCM device accuracy shall be determined for each of the N tests.
From the number of N tests: x1, x2, … xN, the average Xtests and the variance VAR are to be determined from all N measurements:
Xtests=x1+ x2+ x3+ …+ xN∕N
and
VAR=x1− Xtests2+x2− Xtests2+ …+xN− Xtests2∕N− 1
3.
For each number of tests, one of the three following decisions (see (i) to ((iii) below) can be reached for pollutants based on the limit value L for each pollutant, the average of all N tests: Xtests, the variance of the test results VAR and the number of tests N:
(i)Pass the family if Xtests<A× L− VAR∕L
(ii)Fail the family if Xtests>A× L−N− 3∕13× VAR∕L
(iii)Take another measurement if:
A × L − VAR∕L≤Xtests≤A × L −N − 3∕13× VAR ∕ L
For the measurement of pollutants the factor A is set at 1,05 in order to take into account inaccuracies in the measurements.
4.
For CO2 and EC the normalised values for CO2 and EC shall be used:
xi=CO2test− i∕CO2declared.
xi=ECtest− i∕ECDC, COP
In the case of CO2 and EC the factor A is set at 1.01 and the value for L is set at 1. So in the case of CO2 and EC the criteria are simplified to:
(i)Pass the family if Xtests<A− VAR
(ii)Fail the family if Xtests>A−N− 3∕13× VAR
(iii)Take another measurement if:
A − VAR≤Xtests≤A −N − 3∕13× VAR
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
For vehicles referred to in Article 4a, the accuracy of the OBFCM device shall be calculated as follows:
x i,OBFCM accuracy of the OBFCM device determined for each single test i in accordance with the formulae point 4.2 of Annex XXII.
The Type Approval authority shall keep a record of the determined accuracies for each COP family tested.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/I/appendix/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-I/appendix-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.