BS ISO 7634:2007
Current
The latest, up-to-date edition.
Road vehicles. Compressed air braking systems for towed vehicles including those with electronic braking control functions .Test procedures
Hardcopy , PDF
English
31-07-2007
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
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