GB/T 20913-2007 PDF English
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The protection of the occupants in the event of an off-set frontal collision for passenger car
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GB/T 20913-2007: The protection of the occupants in the event of an off-set frontal collision for passenger car
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GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
T 09
The protection of the occupants in the event of
an off-set frontal collision for passenger car
Issued on. APRIL 30, 2007
Implemented on. DECEMBER 1, 2007
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... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Requirements... 8
5 Instructions for users of vehicles equipped with airbags... 10
6 Test methods... 12
7 Modification and extension of the vehicle type... 17
Annex A (Normative) Determination of performance criteria... 19
Annex B (Normative) Arrangement of dummies and adjustment of restraint
systems... 23
Annex C (Normative) Procedure for determining the “H” point and the actual
torso angle for seating positions... 27
Annex D (Normative) Measuring and testing technique. Instrumentation... 38
Annex E (Normative) Provisions of deformable barrier... 45
Annex F (Normative) Calibration procedure for the dummy lower leg and foot
... 54
Annex G (Normative) Test procedure with trolley... 60
Annex H (Informative) Comparison between the clause numbers of this
Standard and those of ECE R94... 63
1 Scope
This Standard specifies the technical requirements and test methods for the
protection of the occupants in the front outboard seats in the event of an off-set
frontal collision for passenger car.
This Standard is applicable to the Class M1 vehicles with a maximum design
total mass of 2 500kg or less. For Class M1 vehicles of which the mass exceeds
this range and other types of vehicles, it can be referred to for implementation.
2 Normative references
The provisions in the following documents become the provisions of this
Standard through reference in this Standard. For 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 editions of these documents are
applicable. For undated references, the latest editions apply to this Standard.
GB 14166 Safety belts and restraint systems for adult occupants of motor
vehicles
GB 14167 Safety-belt anchorages for vehicles
ISO 209 Wrought aluminium and aluminium alloys
3 Terms and definitions
The following terms and definitions are applicable to this Standard.
3.1 Protective system
It refers to the interior fittings and devices intended to restrain the occupants
and contribute towards ensuring compliance with the requirements set out in
Clause 4.
3.2 Type of protective system
It refers to a category of protective devices which do not differ in such essential
respects as.
3.3 Vehicle width
It refers to the distance between two planes parallel to the longitudinal median
plane of the vehicle and touching the vehicle on either side of the said plane
but excluding the rear-view mirrors, side marker lamps, tyre pressure indicators,
direction indicator lamps, position lamps, flexible mud-guards and the deflected
part of the tyre side-walls immediately above the point of contact with the
ground.
3.4 Overlap
It refers to the percentage of the vehicle section directly in line with the barrier
face and the vehicle width.
3.5 Deformable barrier
It refers to a crushable section mounted on the front of a rigid block.
4 Requirements
4.1 General requirements
4.1.1 The “H” point for each seat shall be determined in accordance with the
procedure described in Annex C.
4.1.2 When the protective system for the front seating positions includes belts,
the belt components shall meet the requirements of GB 14166.
4.1.3 Seating positions where a dummy is installed and the protective system
includes belts, shall be provided with anchorage points conforming to GB 14167.
4.2 Technical requirements
4.2.1 The test of the vehicle carried out in accordance with the method
described in Clause 6 of this Standard shall be considered satisfactory if the
following requirements are all met at the same time.
4.2.2 The performance criteria determined, in accordance with Annex D, on
the dummies in the front outboard seats shall meet the following requirements.
4.2.2.1 The head performance criterion (HPC) shall not exceed 1 000.The
resultant head acceleration shall not exceed 80g for more than 3ms. However,
it excludes rebound movement of the head.
4.2.2.2 The neck injury criteria (NIC) shall not exceed the values shown in
Figures 1 and 2.
4.2.6 After the impact test, it shall be possible, without the use of tools, except
for those necessary to support the weight of the dummy.
4.2.6.1 To open at least one door, if there is one, per row of seats and, where
there is no such door, to move the seats or tilt their backrests as necessary to
allow the evacuation of all the occupants; this is, however, only applicable to
vehicles having a roof of rigid construction.
4.2.6.2 To release the dummies from their restraint system which, if locked,
shall be capable of being released by a maximum force of 60N on the release control.
4.2.6.3 To remove the dummies from the vehicle without adjustment of the seats.
4.2.7 No leakage from the fuel feed system shall occur on collision.
4.2.8 After the impact test, if there is continuous leakage of liquid from the fuel
feed system, the average rate of leakage in the first 5min after the collision shall
not exceed 30 g/min; if the liquid from the fuel feed system mixes with liquids
from the other systems and the various liquids cannot easily be separated and
identified, all the liquids collected shall be taken into account in evaluating the
continuous leakage.
5 Instructions for users of vehicles equipped with airbags
5.1 The vehicles shall carry information to the effect that it is equipped
with airbags for seats.
5.1.1 For a vehicle fitted with an airbag assembly intended to protect the driver,
this information or relevant information shall consist of the inscription “AIRBAG”
located in the interior of the circumference of the steering wheel; this inscription
shall be durably affixed and easily visible.
5.1.2 For a vehicle fitted with a passenger airbag intended to protect the
occupants, the warning label shall consist of the information described in
paragraph 5.2 of this Standard.
5.2 A vehicle fitted with one or more passenger frontal protection airbags shall
carry information about the extreme hazard associated with the use of
rearward-facing child restraints on seats equipped with airbag assemblies.
5.2.1 As a minimum, this information shall consist of a label containing a
pictogram and text warning as indicated in Figure 4.
5.2.2 The warning label shall consist of prescriptions in Chinese.
5.2.3 In the case of a frontal protection airbag on the front passenger seat,
the warning shall be durably affixed to each face of the passenger front sun
visor in such a position that at least one warning on the sun visor is visible at all
times, irrespective of the position of the sun visor. Alternatively, one warning
shall be on the visible face of the stowed sun visor and a second warning shall
be on the roof behind the visor, so, at least one warning is visible all times. The
text size must allow the label to be easily read by a normal sighted user seated
on the seat concerned.
5.2.4 Detailed information shall be contained in the user manual of the vehicle
in Chinese. “Do not use a rearward-facing child restraint on a seat protected by
an airbag!” The text shall be accompanied by an illustration of the warning.
6 Test methods
6.1 Installation and preparation of the vehicle
6.1.1 Testing ground
The testing ground shall be large enough to accommodate the run-up track,
barrier and technical installations necessary for the test. The last part of the
track, for at least 5m before the barrier, shall be horizontal, flat and smooth.
6.1.2 Barrier
The front face of the barrier consists of a deformable structure as defined in
Annex E of this Standard. The front face of the deformable structure is
perpendicular to the direction of travel of the test vehicle, with an allowable
deviation of within ± 1°.
6.1.3 Orientation of the barrier
Label outline, vertical and horizontal lines black
Artwork black with white background Bottom text black with white
background
Circle and line red with white background Top text and symbol black with yellow background
6.1.4.2 Mass of vehicle
6.1.4.2.1 For the test, the mass of the vehicle submitted shall be the unladen
kerb mass.
6.1.4.2.2 The fuel tank shall be filled with water to mass equal to 90% of the
mass of a full as specified by the manufacturer with a tolerance of ± 1%.
6.1.4.2.3 All the other systems (brake, cooling, etc.) may be empty in this case.
The mass of the liquids shall be carefully compensated.
6.1.4.2.4 If the mass of the measuring apparatus on board the vehicle
exceeds the 25kg allowed, it may be compensated by reductions which have
no noticeable effect on the results measured under paragraph 6.6.
6.1.4.2.5 The mass of the measuring apparatus on board the vehicle shall not
change each axle reference load by more than 5%, each variation not
exceeding 20kg.
6.1.4.2.6 The mass of the vehicle resulting from the provisions of paragraph
6.1.4.2.1 above shall be indicated in the test report.
6.1.4.3 Passenger compartment adjustments
6.2 Dummies
6.2.1 A dummy corresponding to the specifications for Hybrid III fitted with a
45° ankle and meeting the specifications for its adjustment shall be installed in
each of the front outboard seats in accordance with the conditions set out in
Annex B. The dummy shall be equipped for recording the data necessary to
determine the performance criteria with measuring systems corresponding to
the specifications in Annex D. The ankle of the dummy shall be certified in
accordance with the procedures in Annex F.
6.2.2 The car will be tested with restraint systems, as provided by the
manufacturer.
6.3 Propulsion of vehicle
6.3.1 The vehicle shall not be propelled by its own engine.
6.3.2 At the moment of impact, the vehicle shall no longer be subject to the
action of any additional steering or propelling device.
6.3.3 The course of the vehicle shall be such that it satisfies the requirements
of paragraphs 6.1.2 and 6.1.3.2.
6.4 Test speed
Vehicle speed at the moment of impact shall be 56+1 0 km/h. However, if the test
was performed at a higher impact speed and the vehicle met the requirements,
the test shall be considered satisfactory.
6.5 Measurements to be made on dummy in front seats
6.5.1 All the measurements necessary for the verification of the performance
criteria shall be made with measurement systems corresponding to the
specifications of Annex D.
6.5.2 The different parameters shall be recorded through independent data
channels of the following CFC (Channel Frequency Class).
6.6 Measurements to be made on the vehicle
6.6.1 To enable the simplified test described in Annex G to be carried out, the
deceleration time history of the structure shall be determined on the basis of
the value of the longitudinal accelerometers at the base of the “B” pillar on the
struck side of the vehicle with a CFC of 180 by means of data channels
corresponding to the requirements set out in Annex D.
6.6.2 The speed time history which will be used in the simplified test
procedure described in Annex G shall be obtained from the longitudinal
accelerometer at the “B” pillar on the struck side.
7 Modification and extension of the vehicle type
Any modification affecting the structure, the number of seats, the interior trim or
fittings, or the position of the vehicle controls or of mechanical parts which might
affect the energy-absorption capability of the front of the vehicle shall be
brought to the notice of the Administrative Department granting approval. The
Administrative Department of the vehicle shall then either.
7.1 Consider that the modifications made are unlikely to have an appreciable
adverse effect and that in any case the vehicle still complies with the
requirements.
7.2 Require the inspection agency responsible for conducting the tests to
carry out one of the following tests, according to the nature of the modifications.
7.2.1 Any modification of the vehicle affecting the general form of the structure
of the vehicle and / or any increase in mass greater than 8% which in the
judgement of the authority would have a marked influence on the results of the
tests shall require a repetition of the test as described in Clause 6.
7.2.2 If the modifications concern only the interior fittings, if the mass does not
differ by more than 8% and if the number of front seats initially provided in the
vehicle remains the same, the following tests shall be carried out.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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