INHALT

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 and/or to rolling resistance

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 and/or to rolling resistance
1. SCOPE
2. DEFINITIONS
2.17. Wet Grip measurements – Specific definitions
2.18. Rolling resistance measurement – Specific definitions
2.18.1. Rolling resistance F
r
2.18.2. Rolling resistance coefficient C
r
2.18.3. New test tyre
2.18.4. Laboratory Control Tyre
2.18.5. Capped inflation
2.18.6. Parasitic loss
2.18.7. Skim test reading
2.18.8. Inertia or Moment of Inertia.
2.18.9. Measurement reproducibility σ
m
3. APPLICATION FOR APPROVAL
4. MARKINGS
5. APPROVAL
6. SPECIFICATIONS
6.4.1. Tyre snow performance requirements
6.4.1.1. Class C1 and C2 tyres
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 RESPONSIBLE FOR CONDUCTING APPROVAL TESTS AND OF TYPE APPROVAL AUTHORITY
12. TRANSITIONAL PROVISIONS
ANNEX 1
COMMUNICATION
(Maximum format: A4 (210 × 297 mm))
ANNEX 2
EXAMPLES OF APPROVAL MARKS
Appendix 1
ARRANGEMENTS OF APPROVAL MARKS
(See paragraph 5.4 to this Regulation)
Example 1
Example 2
Appendix 2
APPROVAL ACCORDING TO REGULATION No 117 COINCIDENT WITH APPROVAL TO REGULATION No 30 OR 54
(1)
Example 1
Example 2
Example 3
Example 4
Appendix 3
EXTENSIONS TO COMBINE APPROVALS ISSUED IN ACCORDANCE WITH REGULATION Nos 117, 30 OR 54
(2)
Example 1
Example 2
Appendix 4
EXTENSIONS TO COMBINE APPROVALS ISSUED IN ACCORDANCE WITH REGULATION No 117
(3)
Example 1
Example 2
Example 3
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 minimise 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
Figure 1
Microphone positions for the measurement
Appendix 1
TEST REPORT
Part 1 —
Report
Part 2 —
Test data
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
4. TEST METHOD
4.1. Measurement of the residual voids content
4.2. Sound absorption coefficient
4.3. Volumetric macro-texture 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
1.1.1. Standard reference test tyre (SRTT) method
1.1.2. British pendulum number (BPN) method
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 1
TEST REPORT (ADHESION ON WET SURFACE)
Part 1 —
Report
Part 2 —
Test data
ANNEX 6
TEST PROCEDURE FOR MEASURING ROLLING RESISTANCE
1. TEST METHODS
2. TEST EQUIPMENT
2.1. Drum specifications
2.1.1. Diameter
2.1.2. Surface
2.1.3. Width
2.2. Measuring rim
2.3. Load, alignment, control and instrumentation accuracies
2.4. Thermal environment
2.4.1. Reference conditions
2.4.2. Alternative conditions
2.4.3. Drum surface temperature.
3. TEST CONDITIONS
3.1. General
3.2. Test speeds
3.3. Test load
3.4. Test inflation pressure
3.5. Duration and speed
4. TEST PROCEDURE
4.1. General
4.2. Thermal conditioning
4.3. Pressure adjustment
4.4. Warm-up
4.5. Measurement and recording
Figure 1
4.6. Measurement of parasitic losses
4.6.1. Skim test reading
4.6.2. Deceleration method
4.7. Allowance for machines exceeding σ
m
criterion
5. DATA INTERPRETATION
5.1. Determination of parasitic losses
5.1.1. General
5.1.2. Force method at tyre spindle
5.1.3. Torque method at drum axis
5.1.4. Power method at drum axis
5.1.5. Deceleration method
5.2. Rolling resistance calculation
5.2.1. General
5.2.2. Force method at tyre spindle
5.2.3. Torque method at drum axis
5.2.4. Power method at drum axis
5.2.5. Deceleration method
6. DATA ANALYSIS
6.1. Rolling resistance coefficient
6.2. Temperature correction
6.3. Drum diameter correction
6.4. Measurement result
Appendix 1
TEST EQUIPMENT TOLERANCES
1. PURPOSE
2. TEST RIMS
2.1. Width
2.2. Run-out
3. DRUM/TYRE ALIGNMENT
3.1. Load application
3.2. Tyre alignment
3.2.1. Camber angle
3.2.2. Slip angle
4. CONTROL ACCURACY
5. INSTRUMENTATION ACCURACY
6. COMPENSATION FOR LOAD/SPINDLE FORCE INTERACTION AND LOAD MISALIGNMENT FOR THE FORCE METHOD ONLY
7. TEST SURFACE ROUGHNESS
Appendix 2
MEASURING RIM WIDTH
1. CLASS C1 TYRES
2. CLASS C2 AND C3 TYRES
Appendix 3
TEST REPORT AND TEST DATA (ROLLING RESISTANCE)
Part 1 —
Report
Part 2 —
Test data
ANNEX 7
PROCEDURES FOR SNOW PERFORMANCE TESTING
1. SPECIFIC DEFINITIONS FOR SNOW TEST WHEN DIFFERENT OF EXISTING ONES
2. SPIN TRACTION METHOD FOR CLASS C1 AND C2 TYRES
3. BRAKING ON SNOW METHOD FOR CLASS C1 TYRES
3.1. General conditions
3.1.1. Test course
3.1.2. Vehicle
3.1.3. Tyres
3.1.4. Load and pressure
3.1.5. Instrumentation
3.2. Testing sequences
3.3. Test procedure
3.4. Data evaluation and presentation of results
3.4.1. Parameters to be reported
3.4.2. Statistical validations
Appendix 1
PICTOGRAM DEFINITION OF ‘ALPINE SYMBOL’
Appendix 2
TEST REPORTS AND TEST DATA
Part 1 —
Report
Part 2 —
Test data