BS ISO 7635:2006

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 the tests
   7.1 Preparation and static checks and tests
   7.2 Basic performance tests - Unladen
   7.3 Failure tests - Unladen
   7.4 ABS tests - Unladen
   7.5 ABS tests - Laden
   7.6 Failure tests - Laden
   7.7 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 Devices and instruments needed for the testing
9 Static tests and checks
   9.1 Static braking force and control force vs. line pressure
   9.2 Capacity of energy sources
   9.3 Service braking system - Response time measurement
   9.4 Automatic braking
   9.5 Brake failure and defect warning signals
   9.6 Tests on vehicles equipped with spring brake actuators
   9.7 Additional tests on vehicles equipped with EBS
10 Basic performance tests - Unladen
   10.1 Type 0 test (service braking system cold brake
        effectiveness, engine disconnected)
   10.2 Type 0 test (service braking system cold brake,
        engine connected)
   10.3 Parking braking system - Hill holding test
   10.4 Secondary braking system test
   10.5 Wheel locking sequence
11 Failure tests - Unladen
   11.1 Service braking system partial failure test
        (type 0 test, cold brake effectiveness, engine
        disconnected)
   11.2 Failed load sensing device test/function test
   11.3 Failure of the energy source on vehicles
        equipped with EBS
12 ABS tests - Unladen
   12.1 ABS failure
   12.2 Determination of the peak coefficient of
        adhesion on the high adhesion surface
   12.3 Determination of adhesion utilization on
        high adhesion surface
   12.4 Determination of adhesion utilization on low
        adhesion surface
   12.5 Additional checks
13 ABS tests - Laden
   13.1 Additional split adhesion test
   13.2 Energy consumption on low adhesion surface
14 Failure tests - Laden
   14.1 Service braking system partial failure test
        (type 0 test, cold brake effectiveness, engine
        disconnected)
   14.2 Failed load sensing device test
   14.3 Energy source failure test
15 Basic performance tests - Laden
   15.1 Parking braking system - Hill holding test
   15.2 Parking braking system - Dynamic test
   15.3 Wheel locking sequence
   15.4 Type 0 test (service braking system cold brake
        effectiveness, engine disconnected)
   15.5 Type 0 test (service braking system cold brake,
        engine connected)
   15.6 Warning device test
   15.7 Energy storage capacity test
   15.8 Type II or type IIA tests (downhill,
        endurance braking test)
   15.9 Type I test (fade test)
Annex A (normative) Typical braking equipment
Bibliography

Prescribes the method of testing the air or air over hydraulic braking systems of vehicles of categories M and N (excluding M1 and N1) as defined in Annex 7 to the UN-ECE Consolidated Resolution on the Construction of Vehicles (R.E.3.) which are built to comply with UN-ECE Regulation 13/09 including supplements 1-6.

This International Standard specifies the method of testing the air or air over hydraulic braking systems of vehicles of categories M and N (excluding M1 and N1) as defined in Annex7 to the UN-ECE Consolidated Resolution on the Construction of Vehicles (R.E.3.) which are built to comply with UN-ECE Regulation 13/09 including supplements 1-6. Test methods covering lock actuators or the electrical regenerative braking systems of electric and hybrid vehicles are not included in this edition.

NOTE Requirements of UN-ECE Regulation 13 related purely to the design of braking systems and braking system components are not part of this International Standard.

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