BS ISO 7634:2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Test site conditions
    5.1 Test site
    5.2 Road surface condition
    5.3 Ambient conditions
6 General requirements
7 Recommended sequence of tests
    7.1 Preparation and static checks and tests
    7.2 Basic performance tests - unladen
    7.3 Antilock braking system/electronically controlled
          braking system (ABS/EBS) tests - unladen
    7.4 Basic performance tests - Laden
8 Vehicle preparation
    8.1 Documents and basic data
    8.2 Braking system condition and bedding
    8.3 Adjustment of braking equipment
    8.4 Tyre conditions
    8.5 Towing vehicles
    8.6 Instrumentation - General
    8.7 Provision for failure simulation
    8.8 Loading condition
    8.9 Additional vehicle to tow the combination of normal
          towing vehicle and test trailer
    8.10 Additional instrumentation for ABS equipped trailers
    8.11 Additional instrumentation for trailer with an
          electric control line
9 Energy storage capacity test
    9.1 Test conditions
    9.2 Test procedure
    9.3 Test requirement
    9.4 Presentation of results
10 Service braking system - Response time measurement
    10.1 General
    10.2 Towing vehicle simulator
    10.3 Test conditions
    10.4 Test procedure
    10.5 Presentation of results
11 Automatic braking
12 Brake defect and failure warning signals
    12.1 Antilock braking system warning signal
    12.2 EBS warning signal check
13 Tests on trailers equipped with spring brake actuators
    13.1 Initial conditions
    13.2 Energy depletion test
    13.3 Spring brake actuation test
    13.4 Auxiliary release system check
14 Dynamometer tests (alternative to vehicle tests)
    14.1 General
    14.2 Alternative type I tests (fade test for trailers of
          categories O[2] and O[3])
    14.3 Alternative type III tests (fade test for category
          O[4] trailers)
15 Transfer of results of type I or type III tests to other
    vehicles
    15.1 General
    15.2 Presentation of results
16 Control failure of load-sensing device/function - Stationary
    test
17 Auxiliary equipment failure
18 Basic performance tests - Unladen
    18.1 Type O test (Service braking system cold brake
          effectiveness)
19 Antilock braking system/electronically controlled braking
    system (ABS/EBS) tests - Unladen
    19.1 Determination of adhesion utilization on high adhesion
          surface
    19.2 Determination of the peak coefficient of adhesion on
          the high adhesion surface
    19.3 Wheel behaviour
    19.4 Split adhesion tests
    19.5 Energy consumption of the antilock braking system
          (on a high adhesion surface)
    19.6 Antilock braking system failure
    19.7 Additional tests on trailers equipped with EBS
20 Basic performance tests - Laden
    20.1 Parking braking system tests
    20.2 Type O test (Service braking system cold brake
          effectiveness)
    20.3 Control failure of load-sensing device/function
          - Road test
    20.4 Type I test (fade test for trailers of categories
          O[2] and O[3])
    20.5 Type III test (fade test for vehicles of category
          O[4])
Annex A (normative) Description of test vehicle, axle or brake
Annex B (normative) Test report
Annex C (informative) Figures
Bibliography

Defines the test procedures for testing the operational performance requirements of towed vehicles of Category O (full trailers, semi-trailers, and centre-axle trailers) as defined in Annex 7 of the UN-ECE Consolidated Resolution on the Construction of Vehicles (R. E. 3).

This International Standard specifies the test procedures for testing the operational performance requirements of towed vehicles of CategoryO (full trailers, semi-trailers, and centre-axle trailers) as defined in Annex7 of the UN-ECE Consolidated Resolution on the Construction of Vehicles (R. E. 3). This includes vehicles fitted with compressed air braking systems (with and without an antilock braking system or an electronically controlled braking system), in accordance with UN-ECE Regulation No. 13, 09 series of amendments, supplements 1 to 6. Test methods covering lock actuators are not included.

The values in square brackets [ ] and the values in the tables are taken from ECE Regulation No. 13 for information.