GB/T 20913-2007The protection of the occupants in the event of an off-set frontal collision for passenger car (English PDF)

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.

4.1 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.

5.1.2 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.

6.1 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.

7.2 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.

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