COMMISSION REGULATION (EU) No 1235/2011
of 29 November 2011
amending Regulation (EC) No 1222/2009 of the European Parliament and of the Council with regard to the wet grip grading of tyres, the measurement of rolling resistance and the
verification procedure
(Text with EEA relevance)
THE EUROPEAN COMMISSION,
Having regard to the Treaty on the Functioning of the European Union,
Having regard to Regulation (EC) No 1222/2009 of the European Parliament and of the Council of 25 November 2009 on the labelling of tyres with respect to fuel efficiency
and other esntial parameters ( 1 ), and in particular Article 11(a)
and (c) thereof, Whereas:
(1) Regulation
(EC) No 1222/2009 of the European Parliament and of the Council aims at establishing a考研复试怎么准备
framework for the provision of harmonid information on tyre parameters through labelling, allowing end-urs to make an informed choice when purchasing tyres.
(2) The
rolling resistance of tyres determines their fuel effi ciency grading. Measurement of rolling resistance must be reproducible; tests on the same tyres in different laboratories must produce the same results in order to ensure a fair comparison between tyres from different suppliers. In addition, a good reproducibility of testing results prevents market surveillance authorities from obtaining different results from tho of the suppliers when testing the same tyres.
(3) A
procedure for the alignment of test laboratories with regard to the measurement of rolling resistance would improve the reproducibility of the testing results.
(4) Since
a suitable harmonid testing method of grip on wet roads has been developed at ISO level, a wet grip grading of C2 and C3 tyres should now be introduced, in accordance with Article 11 (a) of Regulation (EC) No 1222/2009.
(5) The
clarity of the conformity verification procedure t out in Annex IV of Regulation (EC) No 1222/2009 should be improved by introducing thresholds according to which the declared values ud for the labelling requirements are considered to be in compliance with that Regulation.
(6) Regulation (EC) No 1222/2009 should therefore be
amended accordingly.
(7) The
measures provided for in this Regulation are in accordance with the opinion of the Committee estab lished by Article 13 of Regulation (EC) No 1222/2009,
HAS ADOPTED THIS REGULATION:
Article 1
Amendment to Regulation (EC) No 1222/2009 Regulation (EC) No 1222/2009 is amended as follows: (1) Annex I, part A: Fuel efficiency class, the first ntence is
replaced by the following:
‘The fuel efficiency class must be determined on the basis of the rolling resistance coefficient (RRC ) according to the “A” to “G” scale specified below and measured in accordance with Annex 6 of UNECE Regulation No 117 and its subquent amendments and aligned according to the procedure laid down in Annex IVa.’;
(2) in Annex I, part B: Wet grip class, the text and table are
replaced by the following:
‘1. The wet grip class of C1 tyres must be determined on
the basis of the wet grip index (G ) according to the “A” to “G” scale specified in the table below, calculated in accordance with point 3 and measured in accordance with Annex V. 2. The wet grip class of C2 and C3 tyres must be
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determined on the basis of the wet grip index (G ) according to the “A” to “G” scale specified in the table below, calculated in accordance with point (3) and measured in accordance with ISO 15222:2011 whereby the following Standard Reference Test Tyres (SRTT) must be ud:
(i) for C2 tyres, the SRTT 225/75 R 16 C, ASTM F 2872-11; (ii) for C3 tyres having Nominal Section Width lower
than 285 mm, the SRTT 245/70R19.5, ASTM F 2871-11;
( 1 ) OJ L 342, 22.12.2009, p. 46.
(iii) for C3 tyres having Nominal Section Width greater than or equal to 285 mm, the SRTT 315/70R22.5, ASTM F 2870-11.
3. Calculation of wet grip index (G)
G= G(T) – 0,03
where: G(T) = wet grip index of the candidate tyre as measured in one test cycle
(3) Annex IV: Verification procedure, is replaced by the following:
‘ANNEX IV
Verification procedure
The conformity of the declared fuel efficiency and wet grip class, as well as the declared external rolling noi class and declared value, must be assd for each tyre type or each grouping of tyres as determined by the supplier, according to one of the following procedures:
(a) (i) a single tyre or tyre t is tested first. If the measured values meet the declared class or external rolling noi
疲惫的英文declared value to within the tolerance defined in Table 1, the test is successfully pasd; and
(ii) if the measured values do not meet the declared class or external rolling noi declared value within the range defined in Table 1, three more tyres or tyre ts are tested. The average measurement value stemming
from the three tyres or tyre ts tested is ud to asss conformity with the declared information within the
range defined in Table 1; or
(b) where the labelled class or values are derived from type approval test results obtained in accordance with
Directive 2001/43/EC, Regulation (EC) No 661/2009, or UNECE Regulation No 117 and its subquent amendments, Member States may make u of measurement data obtained from conformity of production tests on tyres.
Asssment of the measurement data obtained from the conformity of production tests must take into account the allowances defined in Table 1.
Table 1
(4) the text t out in the Annex to this Regulation is added as Annex IVa.
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Article 2
Entry into force
This Regulation shall enter into force on the 20th day following its publication in the Official Journal of the European Union.
This Regulation shall apply from 30 May 2012.
This Regulation shall be binding in its entirety and directly applicable in all Member States.
Done at Brusls, 29 November 2011.
For the Commission
The President
José Manuel BARROSO
ANNEX
‘ANNEX IVa
Laboratory alignment procedure for the measurement of rolling resistance
1. DEFINITIONS
For the purpo of the laboratory alignment procedure, the following definitions apply:
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(1) “Reference laboratory” means a laboratory that is part of the network of laboratories the references of which
have been published for the purpo of the alignment procedure in the Official Journal of the European Union, and is able to achieve the accuracy of test results determined in ction 3;
(2) “Candidate laboratory” means a laboratory participating in the alignment procedure that is not a reference
laboratory;
(3) “Alignment tyre” means a tyre that is tested for the purpo of performing the alignment procedure;
(4) “Alignment tyres t” means a t of five or more alignment tyres;
(5) “Assigned value” means a theoretical value of one alignment tyre as measured by a theoretical laboratory which
is reprentative of the network of reference laboratories that is ud for the alignment procedure.
2. GENERAL PROVISIONS
2.1. Principle
The measured Rolling Resistance Coefficient (RRC m) in a reference laboratory (l) shall be aligned to the assigned values of the network of reference laboratories.
The RRC m in a candidate laboratory (c) shall be aligned through one reference laboratory of the network of its choice.
2.2. Tyre lection requirements
A t of five or more alignment tyres shall be lected for the alignment procedure in compliance with the criteria
below. One t shall be lected for C1 and C2 tyres together, and one t for C3 tyres.
love story 歌词(a) The t of alignment tyres shall be lected so as to cover the range of different RRCs of C1 and C2 tyres
together, or of C3 tyres. In any event, the difference between the highest RRC m of the tyre t, and the lowest RRC m of the tyre t shall be at least equal to:
(i) 3 kg/t for C1 and C2 tyres; and
(ii) 2 kg/t for C3 tyres.
(b) The RRC m in the candidate or reference laboratories (c or l) bad on declared RRC values of each alignment tyre
of the t shall be spaced out as follows and distributed uniformly:
(i) 1,0 +/– 0,5 kg/t for C1 and C2 tyres; and
(ii) 1,0 +/– 0,5 kg/t for C3 tyres.
ctm是什么意思(c) The lected tyre ction width of each alignment tyre shall be:
(i) ≤ 245 mm for machines measuring C1 and C2 tyres; and
(ii) ≤ 385 mm for machines measuring C3 tyres.
(d) The lected tyre outer diameter of each alignment tyre shall be:
(i) between 510 to 800 mm for machines measuring C1 and C2 tyres; and
(ii) between 771 to 1 143 mm for machines measuring C3 tyres.
(e) Load index values shall adequately cover the range of the tyres to be tested, ensuring that the rolling resistance
force (RRF) values also cover the range of the tyres to be tested.
Each alignment tyre shall be checked prior to u and replaced when:
(a) it shows a condition which makes it unusable for further tests; and/or
(b) there are deviations of RRC m greater than 1,5 per cent relative to earlier measurements after correction for
any machine drift.
2.3. Measurement method
The reference laboratory shall measure each alignment tyre four times and retain the three last results for further analysis, in accordance with paragraph 4 of Annex 6 of UNECE Regulation No 117 and its subquent amendments and applying the conditions t out in paragraph 3 of Annex 6 of UNECE Regulation No 117 and its subquent amendments.
The candidate laboratory shall measure each alignment tyre (n + 1) times with n being specified in ction 5 and retain the n last results for further analysis, in accordance with paragraph 4 of Annex 6 of UNECE Regulation No 117 and its subquent amendments and applying the conditions t out in paragraph 3 of Annex 6 of UNECE Regulation No 117 and its subquent amendments.
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Each time an alignment tyre is measured, the tyre/wheel asmbly shall be removed from the machine and the entire test procedure specified in paragraph 4 of Annex 6 of UNECE Regulation No 117 and its subquent amendments shall be followed again from the start.
The candidate or reference laboratory shall calculate:
(a) the measured value of each alignment tyre for each measurement as specified in Annex 6, paragraphs 6.2 and
6.3, of UNECE Regulation No 117 and its subquent amendments (i.e. corrected for a temperature of 25 °C and
a drum diameter of 2 m);
(b) the mean value of the three (in the ca of reference laboratories) or n (in the ca of candidate laboratories) last南昌西点培训班有哪些
measured values of each alignment tyre; and
(c) the standard deviation (σm) as follows:
σm¼
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi1
p ·X p i¼ 1σ2m;i v u u t
σm;i¼
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
1
n – 2
·X n j¼ 28 > > > :C r i;j– 1n – 1 ·X n j¼ 2Cr i;j9 > > > ;2 v u u tred notice
where:
i is the counter from 1 to p for the number of alignment tyres
j is the counter from 2 to n for the number of repetitions of each measurement for a given alignment tyre
n is the number of repetitions of tyre measurements (n ≥4)
p is the number of alignment tyres (p ≥ 5)
2.4. Data formats to be ud for the computations and results
— The measured RRC values corrected from drum diameter and temperature shall be rounded to 2 decimal places.
— Then the computations shall be made with all digits: there shall be no further rounding except on the final alignment equations.
— All standard deviation values shall be displayed to 3 decimal places.
— All RRC values will be displayed to 2 decimal places.
— All alignment coefficients (A1l, B1l, A2c and B2c) shall be rounded and displayed to 4 decimal places.
