Regulation No 117 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and to adhesion on wet surfaces
1. SCOPE
2. DEFINITIONS
3. APPLICATION FOR APPROVAL
4. MARKINGS
5. APPROVAL
6. SPECIFICATIONS
Nominal Section Width |
Limit dB(A) |
145 and lower |
72 |
Over 145 up to 165 |
73 |
Over 165 up to 185 |
74 |
Over 185 up to 215 |
75 |
Over 215 |
76 |
Category of use |
Limit dB(A) |
Normal |
75 |
Snow |
77 |
Special |
78 |
Category of use |
Limit dB(A) |
Normal |
76 |
Snow |
78 |
Special |
79 |
Category of use |
Wet grip index (G) |
Snow tyre with a speed symbol (‘Q’ or below minus ‘H’) indicating a maximum permissible speed not greater than 160 km/h |
≥ 0,9 |
Snow tyre with a speed symbol (‘R’ and above, plus ‘H’) indicating a maximum permissible speed greater than 160 km/h |
≥ 1,0 |
Normal (road type) tyre |
≥ 1,1 |
7. MODIFICATIONS OF THE TYPE OF PNEUMATIC TYRE AND EXTENSION OF APPROVAL
8. CONFORMITY OF PRODUCTION
9. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
10. PRODUCTION DEFINITELY DISCONTINUED
11. NAMES AND ADDRESSES OF TECHNICAL SERVICES CONDUCTING APPROVAL TESTS AND OF ADMINISTRATIVE DEPARTMENTS
12. INTRODUCTORY PROVISIONS
For Class C1 tyres up to 185 section width |
1 October 2009 |
For Class C1 tyres over 185 up to 215 section width |
1 October 2010 |
For Class C1 tyres over 215 section width |
1 October 2011 |
For Class C2 and Class C3 tyres |
1 October 2009 |
ANNEX 1
COMMUNICATION
(Maximum format: A4 (210 × 297 mm))
ANNEX 2
ARRANGEMENT OF APPROVAL MARKS
(See paragraph 5.4 to this Regulation)
Approval marks in accordance with Regulation No 117
EXAMPLE 1
EXAMPLE 2
Appendix 1
Approval according to Regulation No 117 coincident with approval to Regulations Nos 30 or 54(1)
EXAMPLE 1
EXAMPLE 2
EXAMPLE 3
Appendix 2
Extensions to combine approvals issued in accordance with Regulations Nos 117, 30 or 54(1)
EXAMPLE 1
EXAMPLE 2
ANNEX 3
COAST-BY TEST METHOD FOR MEASURING TYRE-ROLLING SOUND EMISSION
0. INTRODUCTION
1. MEASURING INSTRUMENTS
1.1. Acoustic measurements
1.1.1. Calibration
1.1.2. Compliance with requirements
1.1.3. Positioning of the microphone
1.2. Speed measurements
1.3. Temperature measurements
1.3.1. Air temperature
1.3.2. Test surface temperature
1.4. Wind measurement
2. CONDITIONS OF MEASUREMENT
2.1. Test site
2.2. Meteorological conditions
2.3. Ambient noise
2.4. Test vehicle requirements
2.4.1. General
2.4.2. Vehicle load
2.4.3. Wheelbase
2.4.4. Measures to minimize vehicle influence on sound level measurements
2.5. Tyres
2.5.1. General
2.5.2. Tyre loads
2.5.3. Tyre inflation pressure
2.5.4. Preparations prior to testing
3. METHOD OF TESTING
3.1. General conditions
3.2. Nature and number of measurements
3.3. Test speed range
4. INTERPRETATION OF RESULTS
4.1. Determination of test result
4.2. Regression analysis of rolling sound measurements
4.3. Temperature correction
where |
θ |
= the measured test surface temperature, |
θref |
= 20 °C, |
Figure 1
Microphone positions for the measurement
Appendix
Test Report
PART 1 — REPORT
PART 2 — TEST DATA
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Front left |
Front right |
Rear left |
Rear right |
Test mass (kg) |
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Tyre load index (%) |
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Inflation pressure (cold) (kPa) |
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Run No |
Test Speed km/h |
Direction of run |
Sound level left(2) measured dB(A) |
Sound level right(2) measured dB(A) |
Air temp. °C |
Track temp. °C |
Sound level left(2) temp. corrected dB(A) |
Sound level right(2) temp. corrected dB(A) |
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ANNEX 4
SPECIFICATIONS FOR THE TEST SITE
1. INTRODUCTION
2. REQUIRED CHARACTERISTICS OF THE SURFACE
2.1. Residual voids content
2.2. Sound absorption coefficient
2.3. Texture depth
2.4. Homogeneity of the surface
2.5. Period of testing
3. TEST SURFACE DESIGN
3.1. Area
Figure 1
Minimum requirements for test surface area. The shaded part is called ‘Test Area’
3.2. Design and preparation of the surface
3.2.1. Basic design requirements
3.2.2. Design guidelines
Figure 2
Grading curve of the aggregate in the asphaltic mix with tolerances
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Target values |
Tolerances |
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By total mass of mix |
By mass of the aggregate |
||
Mass of stones, square mesh sieve (SM) > 2 mm |
47,6 % |
50,5 % |
± 5 |
Mass of sand 0,063 < SM < 2 mm |
38,0 % |
40,2 % |
± 5 |
Mass of filler SM < 0,063 mm |
8,8 % |
9,3 % |
± 5 |
Mass of binder (bitumen) |
5,8 % |
N.A. |
± 0,5 |
Max. chipping size |
8 mm |
6,3-10 |
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Binder hardness |
(see paragraph 3.2.2(f)) |
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Polished stone value (PSV) |
> 50 |
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Compactness, relative to Marshall Compactness |
98 % |
4. TEST METHOD
4.1. Measurement of the residual voids content
4.2. Sound absorption coefficient
4.3. Volumetric macrotexture measurement
5. STABILITY IN TIME AND MAINTENANCE
5.1. Age influence
5.2. Maintenance of the surface
5.3. Repaving the test area
6. DOCUMENTATION OF THE TEST SURFACE AND OF TESTS PERFORMED ON IT
6.1. Documentation of the test surface
6.2. Documentation of vehicle noise tests conducted on the surface
ANNEX 5
TEST PROCEDURE FOR MEASURING WET GRIP
1. GENERAL TEST CONDITIONS
1.1. Track characteristics
1.2. Wetting conditions
2. TEST PROCEDURE
2.1. Trailer or special purpose tyre evaluation vehicle procedure
2.1.2. Test procedure
2.2. Standard vehicle procedure
2.2.2. Test procedure
Appendix
Test report
(Adhesion on wet surface)
PART 1 — REPORT
PART 2 — TEST DATA
Tyre |
SRTT |
Candidate |
Control |
Test tyre load (kg) |
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Water depth (mm) (from 0,5 to 1,5 mm) |
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Wetted track temperature average (°C) (from 5 to 35 °C) |
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Run No |
Test Speed km/h |
Direction of run |
SRTT |
Candidate tyre |
Control tyre |
Peak brake force coefficient (pbfc) |
Mean fully developed deceleration (mfdd) |
Wet Grip index (G) |
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