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GB/T 20913-2007 English PDF (GBT20913-2007)

GB/T 20913-2007 English PDF (GBT20913-2007)

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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

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.
GB/T 20913-2007
GB
NATIONAL STANDARD OF THE
PEOPLE 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 Republic of China;
Standardization Administration of the PEOPLE 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. For other seats, the center-plane of the occupant is specified by the manufacturer
C.2.9 Three-dimensional reference system
It refers to a system as described in paragraph C.6 of this annex.
C.2.10 Fiducial marks
It refers to the points (holes, surfaces, marks or indentations) on the vehicle body as defined by the manufacturer.
C.2.11 Vehicle measuring attitude
It refers to the position of the vehicle as defined by the co-ordinates of fiducial marks in the three-dimensional reference system.
C.3 Requirements
C.3.1 Data presentation
For each seating position where reference data are required in order to demonstrate compliance with the provisions of this Standard, all or an
appropriate selection of the following data shall be presented in the form indicated in paragraph C.7 of this annex.
C.3.1.1 The co-ordinates of the ?€?R?€? point relative to the three-dimensional reference system;
C.4.2 The vehicle shall be at the measuring attitude defined in paragraph C.2.11.
C.4.3 The seat, if it is adjustable, shall be adjusted first to the rearmost normal driving or riding position, as indicated by the vehicle manufacturer, taking into consideration only the longitudinal adjustment of the seat, excluding seat travel used for purposes other than normal driving or riding positions. Where other modes of seat adjustment exist (vertical, angular, seat-back, etc.), these will then be adjusted to the position specified by the vehicle manufacturer. For suspension seats, the vertical position shall be rigidly fixed corresponding to a normal driving position as specified by the manufacturer.
C.4.4 The area of the seating position contacted by the 3-D H machine shall be covered by a muslin cotton, of sufficient size and appropriate texture, described as a plain cotton fabric having 18.9 threads per cm?? and weighing 0.228 kg/m?? or knitted or non-woven fabric having equivalent characteristics. If the test is run on a seat outside the vehicle, the floor on which the seat is placed shall have the same essential characteristics 2) as the floor of the vehicle in which the seat is intended to be used.
C.4.5 PLACE the seat and back assembly of the 3-D H machine so that the center-plane of the occupant (C/LO) coincides with the center-plane of the 3- D H machine. At the manufacturer?€?s request, the 3-D H machine may be moved inboard with respect to the C/LO if the 3-D H machine is located so far outboard that the seat edge will not permit levelling of the 3-D H machine.
C.4.6 ATTACH the foot and lower leg assemblies to the seat pan assembly, either individually or by using the T-bar and lower leg assembly. A line through the ?€?H?€? point sight buttons shall be parallel to the ground and perpendicular to the longitudinal center-plane of the seat.
C.4.7 ADJUST the feet and leg positions of the 3-D H machine as follows. C.4.7.1 Designated seating position. driver and outside front passenger C.4.7.1.1 Both feet and leg assemblies shall be moved forward in such a way that the feet take up natural positions on the floor, between the operating pedals if necessary. Where possible, the left foot shall be located approximately the same distance to the left of the center-plane of the 3-D H machine as the right foot is to the right. The spirit level verifying the transverse orientation of the 3- D H machine is brought to the horizontal by readjustment of the seat pan if necessary, or by adjusting the leg and foot assemblies towards the rear. The line passing through the ?€?H?€? point sight buttons shall be maintained
perpendicular to the longitudinal center-plane of the seat.
2) Tilt angle, height difference with a seat mounting, surface texture, etc. Care shall be exercised in holding the T-bar and rocking the 3-D H machine to ensure that no inadvertent exterior loads are applied in a vertical or fore and aft direction.
The feet of the 3-D H machine are not to be restrained or held during this step. If the feet change position, they should be allowed to remain in that attitude for the moment.
Carefully RETURN the back pan to the seat-back and CHECK the two spirits levels for zero position. If any movement of the feet has occurred during the rocking operation of the 3-D H machine, they must be repositioned as follows. Alternately, LIFT each foot off the floor the minimum necessary amount until no additional foot movement is obtained. During this lifting, the feet are to be free to rotate; and no forward or lateral loads are to be applied. When each foot is placed back in the down position, the heel is to be in contact with the supporting structure designed for this.
CHECK the lateral spirit level for zero position; if necessary, APPLY a lateral load to the top of the back pan sufficient to level the 3-D H machine?€?s seat pan on the seat.
C.4.13 Holding the T-bar to prevent the 3-D H machine from sliding forward on the seat cushion, PROCEED as follows.
a) RETURN the back pan to the seat-back;
b) Alternatively APPLY and RELEASE a horizontal rearward load, not to
exceed 25N, to the back angle bar (head space probe) at a height
approximately at the center of the torso weights until the hip angle quadrant indicates that a stable position has been reached after load release. Care shall be exercised to ensure that no exterior downward or lateral loads are applied to the 3-D H machine. If another level adjustment of the 3-D H
machine is necessary, ROTATE the back pan forward, and REPEAT the
procedure from paragr...

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