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GB/T 37474-2019 (GBT 37474-2019)

GB/T 37474-2019_English: PDF (GBT37474-2019)
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BASIC DATA
Standard ID GB/T 37474-2019 (GB/T37474-2019)
Description (Translated English) Methods and requirements of airbag system abuse test for automobile
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard T26
Classification of International Standard 43.040.60
Word Count Estimation 10,137
Date of Issue 2019-05-10
Date of Implementation 2019-12-01
Drafting Organization China Automotive Technology Research Center Co., Ltd.
Administrative Organization National Automotive Standardization Technical Committee (SAC/TC 114)
Proposing organization Ministry of Industry and Information Technology of the People's Republic of China
Issuing agency(ies) State Administration of Markets and China National Standardization Administration

GB/T 37474-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
T 26
Methods and Requirements of Airbag System Abuse
Test for Automobile
ISSUED ON: MAY 10, 2019
IMPLEMENTED ON: DECEMBER 01, 2019
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Requirements ... 5 
5 Test method ... 5 
Methods and Requirements of Airbag System Abuse
Test for Automobile
1 Scope
This Standard specifies methods and requirements of airbag system abuse test
for automobile.
This Standard is applicable to M1 vehicles which install the airbag system and
have a minimum ground clearance of more than 100 mm in the state of mass
in running order.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 19949.1, Road vehicle. Airbag components. Part 1: Vocabulary
JC/T 899, Concrete curbs
3 Terms and definitions
Terms and definitions determined by GB/T 19949.1 and the following ones are
applicable to this document.
3.1 Airbag system
A system that consists of one or several sensor(s), an airbag control unit, and
an airbag module.
3.2 Airbag control unit
An in-vehicle control unit that controls the airbag system.
3.3 Deployment
Inflate the airbag.
3.4 Abuse
Airbag deployment that occurs not for the function of occupant protection.
3.5 Mass in running order
The whole-vehicle mass plus 75 kg.
3.6 Door and lid or bonnet
A system that consists of front and rear doors, engine cover, rear trunk lid, etc.
4 Requirements
After the tests which are specified in 5.2, 5.3, and 5.4 are completed, the airbag
that is equipped in the vehicle shall not deploy.
5 Test method
5.1 Vehicle preparation
5.1.1 The test vehicle shall reflect the characteristics of the series of products
and shall include all normally-installed equipment which shall be in a state of
normal operation.
5.1.2 Before each test, ensure that the transmission system, suspension
system (including tires), steering and braking system of the test vehicle are in
the state that is specified by the vehicle manufacturer, and the engine of the
vehicle is in the starting state or the ignition switch is on the position of "ON".
5.1.3 The mass of the test vehicle shall be the mass in running order.
5.2 Static test
5.2.1 Door and lid test
When the door glass is at the lowest position, close the vehicle door and lid
systems one by one at a speed of lock-body position not less than 4 m/s (the
speed at which the door is closed) without the use of tools. During the test, other
non-test vehicle door and lid systems are closed.
For vehicles whose lock-body speed cannot reach 4 m/s at the moment of
closing the door due to the special design of the door and lid system, carry out
the closing test of the corresponding door and lid system at the highest closing
speed that the vehicle can reach during the test.
5.2.2 Test to move the outer seat in the front row
5.3 Roadblock test (test site: dry hard road)
5.3.1 Test to pass the curb from the front side
Drive the test vehicle at a speed of 40 km/h ± 2 km/h; drive the two front-axle
wheels simultaneously to a T1 curb plane-road that is 100 mm above the
ground; besides, it is required that, during the test, the test vehicle shall be
driven with full braking and no braking respectively once before the front plane
of the test vehicle is 1 m away from the curb (see JC/T 899 for the dimensions).
5.3.2 Test to pass the wooden beam from the front side
Drive the test vehicle at a speed of 40 km/h ± 2 km/h; drive the two front-axle
wheels simultaneously through a wooden beam that is fixed to the ground, of
which the height above the ground is 100 mm, the width is 100 mm and the
length is 2 500 mm; besides, it is required that, during the test, the test vehicle
shall be driven with full braking and no braking respectively once before the
front plane of the test vehicle is 1 m away from the wooden beam.
5.3.3 Test to pass the slope from the front side
Drive the test vehicle, at the speed of 40 km/h ± 2 km/h; make the two front-
axle wheels through a fixed slope at a constant speed (as shown in Figure 4).
The slope is 250 mm high and 2000 mm long.
in millimeters
Figure 4 -- Schematic diagram of the slope dimensions
5.4 Rough road test
5.4.1 Belgian road test
Drive the test vehicle stably at a speed of 40 km/h ± 2 km/h on the Belgian road
(medium Belgian road) for at least 20 m, with full braking and no braking driving
for once respectively. For the Belgian road, it is required that the cross slop is
no more than 1.5%; it shall be paved by 120 mm × 250 mm stones; the height
standard deviation is not more than 15 mm; the road surface is evenly concave
and convex; the road features are shown in Figure 5.
Driving direction of the test vehicle