BS ISO 14794:2011

Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Reference system
5 Variables
6 Measuring equipment
7 Test conditions
8 Tests
9 Data evaluation and presentation of results
Annex A (normative) - Test report - General data and test
        conditions
Annex B (normative) - Test report - Presentation of results
Bibliography

Describes open-loop test methods for determining the effect of braking on the course holding and directional behaviour of heavy vehicles or heavy vehicle combinations when braking is accomplished using the service-brake system, or the retarder or engine brake only.

This International Standard specifies open-loop test methods for determining the effect of braking on the course-holding and directional behaviour of heavy vehicles or heavy vehicle combinations when braking is accomplished using

• the service-brake system, or

• the retarder or engine brake only.

This International Standard is applicable to heavy vehicles — i.e. commercial vehicles, commercial vehicle combinations, buses and articulated buses as defined in ISO3833 — covered by Categories M3, N2, N3, O3 and O4 of UNECE (United Nations Economic Commission for Europe) and EC vehicle regulations. These categories pertain to trucks and trailers with a maximum mass above 3,5t and to buses and articulated buses with a maximum mass above 5t.