GB 4785-2007 English PDF (GB4785-2007)

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GB 4785-2007: Prescription for installation of the external lighting and light-signalling devices for motor vehicles and their trailers [including MODIFICATIONS 1, 2]
GB 4785-2007
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.20
T 38
Replacing GB 4785-1998
Prescription for installation of the external lighting and
light-signaling devices for motor vehicles and their trailers
ISSUED ON. NOVEMBER 01, 2007
IMPLEMENTED ON. JUNE 01, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of contents
Foreword ... 3 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and definitions ... 6 
4 Technical requirements ... 18 
5 Test method ... 64 
6 Inspection rules ... 67 
Appendix A (Normative) States of loading to be taken into consideration in
determining variations in the vertical orientation of the dipped-beam
headlamps ... 69 
Appendix B (Normative) Illustrations of several definitions ... 71 
Appendix C (Normative) Invisibility of a red lamp to the front AND invisibility of
a white lamp to the rear ... 73 
Appendix D (Normative) Measurement of the variation of dipped-beam
inclination as a function of load ... 74 
Appendix E (Normative) An example of an initial adjustment indication ... 80 
Appendix F (Normative) The controls for the headlamp dimming device
referred to in paragraph 4.3.2.6.2.2 of this standard ... 81 
No.1 Amendment of National Standard GB 4785-2007 ... 83 
No.2 Amendment of National Standard GB 4785-2007 ... 87 
- ADD the contents of the daytime running lamp;
- In view of the requirements for automotive lighting by the rapid
development of transportation, this standard refers to ECE R48 (2003
version) to modify the relevant content of the reversing lamp; and ADD
such contents as the gas-discharge light source headlamp and bend
lighting, etc.;
The main technical requirements of this standard such as the general
provisions, special provisions, lamp surface, reference axis, reference center
and angle of geometric visibility, invisibility of front view red light and rear view
white light, various load conditions to determine the dipped-beam variations
along vertical direction, the measurement of the change of the dipped-beam
inclination with the loading change, the indication of the initial adjustment, the
headlamp dimming device controller, and the production conformity control are
consistent with ECE R48.
This standard replaces GB 4785-1998 “Prescription for installation of the
external lighting and light-signaling devices for motor vehicles and their
trailers”. As compared with the 1998 version, this standard has the following
main changes.
- MODIFY and ADD the contents of Chapter 2 “Normative references” of the
previous version;
- MODIFY the contents of Chapter 3 “Definitions” of the previous version,
CHANGE it into Chapter 3 “Terms and definitions” of this version;
- MODIFY the relevant clauses in Chapter 4 “Technical requirements” of the
previous version (e.g. general provisions, lamp light color, and special
requirements);
- MODIFY Chapter 5 “Test methods” and Chapter 6 “Inspection rules” of the
previous version;
- ADD the relevant clauses on the headlamp dimming device;
- ADD such contents as the automotive gas-discharge light source
headlamp, bend lighting, daytime running lamp, and so on.
Appendix A, Appendix B, Appendix C, Appendix D, Appendix E and Appendix
F of this standard are normative.
From the date of implementation of this standard, GB 4785-1998 is abolished.
The automotive products newly applying for type test must comply with this
standard.
Prescription for installation of the external lighting and
light-signaling devices for motor vehicles and their trailers
1 Scope
This standard specifies the technical requirements, test methods and
inspection rules for the installation of external lighting and light-signaling
device for motor vehicles and their trailers.
This standard applies to the motor vehicles of categories M, N and O and their
trailers.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Standard;
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
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
vehicles
GB 21260 Headlamp cleaner
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Type test of a vehicle
It refers to the type test conducted against a vehicle type on the installation
quantity and method of the external lighting and the light-signaling device.
3.2
Transverse plane
It refers to a vertical plane perpendicular to the median longitudinal plane of
the vehicle.
3.3
Unladen vehicle
It refers to a vehicle without driver, crew, passengers and load, BUT with a
full supply of fuel, spare wheel and the tools normally carried;
3.4
Laden vehicle
It refers to a vehicle loaded to its technically permissible maximum mass, as
stated by the manufacturer, who shall also fix the distribution of this mass
between the axles in accordance with the method as described in Appendix
A.
3.5
Lamp
It refers to a device designed to illuminate the road or to emit a light signal to
other road users. Rear registration plate lamps and retro-reflectors are
likewise to be regarded as lamps.
3.5.1
Equivalent lamps
It refers to the lamps having the same function and authorized by the
competent authorities; such lamps may have different characteristics from
those installed on the vehicle when it is approved on condition that they
satisfy the requirements of this standard.
3.5.2
It refers to the lamp used to illuminate the road to the rear of the vehicle and
to warn other road users that the vehicle is reversing or about to reverse.
3.5.19
Parking lamp
It refers to a lamp which is used to draw attention to the presence of a
stationary vehicle in a certain area. In such circumstances it replaces the
front and rear position lamps.
3.5.20
End-outline marker lamp
It refers to the lamp fitted near to the extreme outer edge and as close as
possible to the top of the vehicle and intended to indicate clearly the
vehicle’s overall width. This lamp is intended, for certain vehicles and trailers,
to complement the vehicle’s front and rear position lamps by drawing
particular attention to its bulk.
3.5.21
Side marker lamp
It refers to a lamp used to indicate the presence of the vehicle when viewed
from the side.
3.5.22
Daytime running lamp
It refers to a lamp facing in a forward direction used to make the vehicle
more easily visible when driving during daytime.
3.6
Illuminating surface (SEE Appendix B)
3.6.1
Illuminating surface of a lighting device (3.5.7, 3.5.8, 3.5.16 and 3.5.18)
It refers to the orthogonal projection of the full aperture of the reflector, OR
in the case of ...