GB 17354-1998 English PDF (GB17354-1998)

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GB 17354-1998: Front and rear protective devices for passenger cars
GB 17354-1998
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040
T 22
Front and rear protective devices for passenger cars
(eqv ECE R42)
ISSUED ON: MAY 6, 1998
IMPLEMENTED ON: JANUARY 1, 1999
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 ... 4
2 Definitions ... 4
3 Requirements ... 5
4 Low-speed-impact test procedure ... 6
5 Conditions covering repair, replacement and measurement ... 9
6 Equivalent test methods ... 9
Front and rear protective devices for passenger cars
1 Scope
This Standard the performance requirements and test methods for front and rear
protective devices for passenger cars.
This Standard applies to the vehicles of category M1.
2 Definitions
For the purposes of this Standard, the following definitions apply.
2.1 Protective devices
Essentially elements located at the front and rear ends of vehicles and designed in
such a way as to allow contacts and small shocks to occur without causing any serious
damage.
2.2 Vehicle type
A category of power-driven vehicles which do not differ in such essential respects as:
a) the length and width of the vehicle, and the structure, dimensions, lines and
materials of the front and rear parts of the vehicle in so far as they have an effect
on the results of the impact test prescribed in this Standard;
b) the siting (front, rear or centre) and weight of the engine;
c) the characteristics of the suspension, to the extent that they affect the results of
the impact test prescribed in this Standard.
2.3 Laden test weight
The weight of unladen kerb weight plus the weight of the passengers (taking 75 kg per
passenger) distributed as specified in Table 1:
Table 1 -- Passenger weight distribution
Number of seating
positions
Number of
passengers Distribution
2 and 3 2 2 in the front seats
would prevent its normal function.
3.5 The vehicle’s propulsion, suspension (including tyres), steering and braking
systems shall remain in adjustment and shall operate in a normal manner.
4 Low-speed-impact test procedure
4.1 Testing ground
The test area shall be large enough to accommodate the impactor (striker) propulsion
system and to permit after-impact displacement of the vehicle impacted and installation
of the test equipment. The vehicle shall be placed on a horizontal and level rigid smooth
surface.
4.2 State of the vehicle
4.2.1 The vehicle shall be at rest.
4.2.2 The front wheels shall be in the straight-ahead position.
4.2.3 The tyres shall be inflated to the pressure recommended by the vehicle
manufacture.
4.2.4 The brakes shall be disengaged, and the transmission control shall be in neutral
position.
4.2.5 Vehicles equipped with hydro pneumatic, hydraulic or pneumatic suspension or
a device for automatic levelling according to load shall be tested in the normal running
conditions specified by the manufacturer.
4.3 Impactor (striker)
4.3.1 The impactor shall be of rigid construction, the impact contour being of hardened
steel.
4.3.2 The impacting surface shall conform to the diagram in Figure 1.
4.3.3 The effective mass shall be equal to the mass corresponding to the “unladen
weight” of the vehicle to be tested.
4.3.4 With plane A of the impactor vertical, the reference line shall be horizontal.
4.3.5 The first contact of the impactor with the vehicle shall be by the impact contour
on the protective device. In the two vehicle-loading conditions of “unladen kerb mass”
and “laden test weight”, the protective device between the corners shall be intersected
by the horizontal plane passing through the reference line.
the rest.
4.6.3 In the case of a parallelogram-suspended pendulum, the trajectory described by
any point on the reference line shall be constant with a radius of at least 3.3 m.
4.7 Longitudinal impact test
4.7.1 This test consists of two impacts on the front surface and two impacts on the rear
surface of the vehicle. On each surface one impact is made with the vehicle under
“unladen weight”, and the other is made with the vehicle under “laden test weight”.
4.7.2 For the impacts on the front and rear surfaces, the choice of location of the
impactor for the first impact is free, but for the second impact the median plane of the
impactor shall be at a distance at least 300 mm from the first, provided that during
these impacts the extremities of the impactor do not pass outside a zone defined by
two planes parallel to the longitudinal median plane and passing through the corners
of the vehicle.
4.7.3 The impactor shown in Figure 1 should be placed so that plane A is vertical, and
the reference line is horizontal at the reference height of 445 mm.
4.7.4 The vehicle should be aligned so that a point between the vehicle corners
touches, but does not move, the impactor, the longitudinal median plane of the vehicle
being perpendicular to plane A of the impactor.
4.7.5 The vehicle should be impacted at a speed of 4+0.25 0 km/h.
4.8 Corner impact test
4.8.1 This test consists of an impact at one front corner and an impact at one rear
corner of the vehicle, which is at unladen weight, and an impact at the other front corner
and the other rear corner with the vehicle at the laden test weight.
4.8.2 The impactor shown in Figure 1 should be placed so that plane A is vertical, and
the reference line is horizontal and at the reference height of 445 mm.
4.8.3 The vehicle should be aligned so that a corner of the vehicle touches the impactor
without moving it. In addition, the following conditions shall be met:
a) plane A of the impactor shall make an angle of 60 ± 5° with the longitudinal
median plane of the vehicle;
b) the point of the first contact shall be in the vertical median plane of the impactor
(within a tolerance of ± 25 mm).
4.8.4 The vehicle should be impacted at a speed of 2.5+0.1 -0 km/h.