1 Scope
This standard specifies the technical requirements, test methods and test rules, etc. for installation of external lighting and light-signalling devices for motor vehicles and their trailers.
This standard is applicable to M, N and O motor vehicles and their trailers.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 3977 "Specification of Colors"
GB/T 3978 "Standard Illuminants and Illuminating-viewing Conditions"
GB 4599 "Motor Vehicle Headlamps Equipped with Filament Lamps"
GB/T 7922 "Method of Measuring the Color of Light Sources"
GB 21259 "Headlamps Equipped with Gas-discharge Light Sources for Motor Vehicle"
GB 21260 "Headlamp Cleaner"
ECE R13 "Uniform Provisions Concerning the Approval of Vehicles of Categories M, N and O with Regard to Braking"
ECE R13h "Uniform Provisions Concerning the Approval of Vehicles of Categories M, M and O with Regard to Braking (European, American and Japanese Coordination Edition)"
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
Type test of a vehicle
Type test to a certain vehicle type with regard to the number and mode of installation of external lighting and light-signalling devices.
3.2
Transverse plane
A vertical plane perpendicular to the median longitudinal plane of the vehicle.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Specification
5 Test Methods
6 Test Rules
Annex A (Normative) States of Loading to be Taken into Consideration in Determining Variation in the Vertical Orientation of the Dipped-beam Headlamps
Annex B (Normative) Diagrams for Some Definitions
Annex C (Normative) Forward Visibility of Red Lights and Rearward Visibility of White Lights
Annex D (Normative) Measurement of the Variation of Dipped-beam Inclination as a Function of Load
Annex E (Normative) Example for Initial Adjustment Indication
Annex F (Normative) Headlight Levelling Controller in 4.3.2.6.2.2 of This Standard
