GB/T 20913-2007 English PDF (GB/T20913-2007)

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/T 20913-2007
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 
Foreword
The technical content of this Standard is modified using ECE R94 Uniform
provisions concerning the approval of vehicles with regard to the protection of
the occupants in the event of a frontal collision (Version 01, 2003). The main
differences and reasons between this Standard and ECE R94 are as follows.
a) In the seat section, REFER to the contents of paragraph 5.1.4.3.11.1 in GB
11551-2003 The protection of the occupant in the event of a frontal collision
for passenger car; SUPPLEMENT the corresponding adjustment methods
in this Standard, which is mainly due to the consideration of human body
parameters and model characteristics in China.
b) Due to the formal differences between the standard system and the
regulatory system, this Standard incorporates the content of Annex 3 in
ECE R94 into the standard text, and deletes the contents of the relevant
certification marks in Annex 1 and Annex 2 of ECE R94. The Annex A,
Annex B, Annex C, Annex D, Annex E, Annex F, and Annex G of this
Standard correspond to Annex 4, Annex 5, Annex 6, Annex 8, Annex 9,
Annex 10, and Annex 7 of ECE R94, respectively.
c) Due to the compliance with China’s standard systems, this Standard
deletes the contents of relevant certification management procedures in
Clause 3, Clause 4, Clause 8, Clause 9, Clause 10, Clause 11, and Clause
12 of ECE R94.
The Annex A, Annex B, Annex C, Annex D, Annex E, Annex F, and Annex G of
this Standard are normative annexes. The Annex H is an informative annex.
This Standard was proposed by the National Development and Reform
Commission.
This Standard shall be under the jurisdiction of National Technical Committee
for Standardization of Automobiles.
Drafting organizations of this Standard. China Automotive Technology and
Research Center Co., Ltd; National Automobile Quality Supervision and Test
Center (Xiangfan); Department of Automobile, Tsinghua University; Shanghai
Motor Vehicle Inspection Center; Shanghai Volkswagen Co., Ltd; Technical
Center of Dongfeng Peugeot Citroen Automobile Co., Ltd; Guangqi Honda
Automobile Co., Ltd; Chery Automobile Co., Ltd; Pan Asia Technical Automotive
Center Co., Ltd; National Heavy Vehicle Quality Supervision and Inspection
Center; SAIC-GM-Wuling Automobile Co., Ltd; Volkswagen (China) Investment
Co., Ltd; Nissan (China) Investment Co., Ltd; Dongfeng Nissan Passenger
Vehicle R and D Center, Dongfeng Motor Co., Ltd; Toyota Motor Technical Center
(China) Co., Ltd; Ford Motor (China) Co., Ltd; General Motors (China)
The protection of the occupants in the event of
an off-set frontal collision for passenger car
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
3.14 Rearward-facing
It means facing in the direction opposite to the normal direction of travel of the
vehicle.
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.
4.2.2.3 The neck bending moment about the Y axis shall not exceed 57N·m
in the direction of extension.
4.2.2.4 The thorax compression criterion (ThCC) shall not exceed 50mm.
4.2.2.5 The viscous criterion (V·C) for the thorax shall not exceed 1.0 m/s.
4.2.2.6 The femur force criterion (FFC) shall not exceed the force-time
performance criterion shown in Figure 3.
4.2.2.7 The tibia compression force criterion (TCFC) shall not exceed 8kN.
4.2.2.8 The tibia index (TI), measured at the top and bottom of each tibia, shall
not exceed 1.3 at either location.
6.1.3.1 The orientation of the barrier is such that the first contact of the vehicle
with the barrier is on the steering-column side. Where there is a choice between
carrying out the test with a right-hand or left-hand drive vehicle, the test shall
be carried out with the less favorable hand of drive as determined by the
authority responsible for the tests.
6.1.3.2 The vehicle shall overlap the barrier face by 40% of the vehicle width
± 20mm.
6.1.4 State of vehicle
6.1.4.1 General requirements
The test vehicle shall be representative of the series production, shall include
all the equipment normally fitted and shall be in normal running order. Some
components may be replaced by equivalent masses where this substitution
clearly has no noticeable effect on the results measured under paragraph 6.6.
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
6.1.4.3.1 Position of steering wheel
The steering wheel, if adjustable, shall be placed in the normal position
indicated by the manufacturer or, failing that, midway between the limits of its
range(s) of adjustment. At the end of propelled travel, the steering wheel shall
be left free, with its spokes in the position which according to the manufacturer
If adjustable, the rear seats or rear bench seats shall be placed in the rearmost
position.
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).
6.5.2.1 Measurements in the head of the dummy
The acceleration (a) referring to the center of gravity is calculated from the
triaxial components of the acceleration measured with a CFC of 1 000.
6.5.2.2 Measurements in the neck of the dummy
6.5.2.2.1 The axial tensile force and the fore/aft shear force at the neck/
Annex B
(Normative)
Arrangement of dummies and adjustment of restraint systems
B.1 Arrangement of dummies
B.1.1 Separate seats
The plane of symmetry of the dummy shall coincide with the vertical median
plane of the seat.
B.1.2 Front bench seat
B.1.2.1 Driver
The plane of symmetry of the dummy shall lie in the vertical plane passing
through the steering wheel center and parallel to the longitudinal median plane
of the vehicle. If the seating position is determined by the shape of the bench,
such seat shall be regarded as a separate seat.
B.1.2.2 Outer passenger
The plane of symmetry of the dummy shall be symmetrical with that of the driver
dummy relative to the longitudinal median plane of the vehicle. If the seating
position is determined by the shape of the bench, such seat shall be regarded
as a separate seat.
B.1.3 Bench seat for front passengers (not including driver)
The planes of symmetry of the dummy shall coincide with the median planes of
the seating positions defined by the manufacturer.
B.2 Installation of dummies
B.2.1 Head
The head sensor mounting plane shall be horizontal with a deviation angle
within 2.5°. To level the head of the test dummy in vehicles with upright seats
with nonadjustable backs, the following sequences must be followed. First
ADJUST the position of the “H” point within the limits set forth in paragraph
B.2.4.3.1 to level the head sensor mounting plane of the dummy. If the head
sensor mounting plane is still not level, then ADJUST the pelvic angle of the
dummy within the limits provided in paragraph B.2.4.3.2. If the head sensor
mounting plane is still not level, then ADJUST the neck bracket of the dummy.
It refers to the centerline of the probe of the 3-D H machine with the probe in
the fully rearward position.
C.2.6 Actual torso angle
It refers to the angle measured between a vertical line through the “H” point and
the torso line using the back angle quadrant on the 3-D H machine. The actual
torso angle corresponds theoretically to the design torso angle (for tolerances,
SEE paragraph C.3.2.2 below).
C.2.7 Design torso angle
It refers to the angle measures between a vertical line through the “R” point and
the torso line in a position which corresponds to the design position of the seat-
back established by the vehicle manufacturer.
C.2.8 Center plane of occupant (C/LO)
It refers to the median plane of the 3-D H machine positioned in each
designated seating position; it is represented by the co-ordinate of the “H” point
on the “Y” axis. For individual seats, the center-plane of the seat coincides with
the center-plane of the occupant. F...