QC/T 1057-2017 (QC/T1057-2017, QCT 1057-2017, QCT1057-2017)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| QC/T 1057-2017 | English | 279 |
Add to Cart
|
4 days [Need to translate]
|
Snow chains for vehicle
| Valid |
QC/T 1057-2017
|
Standards related to: QC/T 1057-2017
| Standard ID | QC/T 1057-2017 (QC/T1057-2017) | | Description (Translated English) | Snow chains for vehicle | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Classification of Chinese Standard | T26 | | Word Count Estimation | 14,139 | | Date of Issue | 2017-01-09 | | Date of Implementation | 2017-07-01 | | Regulation (derived from) | Ministry of Industry and Information Technology Announcement No.2 of 2017 | | Summary | This standard specifies the terms and definitions, requirements, test methods, determination of the same type and packaging requirements for automotive anti-skid chains. | QC/T 1057-2017
Snow chains for vehicle
Car snow chains
range
This standard specifies the terms and definitions, requirements, test methods, the same type of judgment and packaging requirements for automotive snow chains.
This standard applies to Ml car snow chains.
Normative references 2
The following documents are essential for the application of this standard. For dated references, only the dated version applies
This standard. For undated references, the latest version (including all amendments) is applicable to this standard.
GB/T 12534 General rules for automotive road test methods
GB 21670 Technical requirements and test methods for brake systems of passenger cars
3 terms and definitions
Column F terms and definitions apply to this standard.
3.1
Snow chains for vechicle
A device installed on automobile tires to increase tire and road grip.
3.2
Packed snow covered track
A flat straight track of compacted snow of at least 500 m in length and 50 m in width, with a slope of < 2%, the snow compaction index measured by the CTI needle anthropometer (see attached
Record A) is 70 ~ 80.
3.3
Ice covered track
A flat straight track with a length of at least.200 m, a width of 20 m, and an ice surface friction coefficient of 0.1-0.2, with a slope of < 2%.
4 Requirements
4.1 General requirements
4.1.1 The appearance of automobile snow chains should be complete, without cracks and delamination, and there should be no sharp corners that damage the road surface; the surface of the snow chains should be free of rust
Corrosion, no plating fall-off, no cracks, no extrusion deformation; should be assembled tightly.
4.1.2 The loading and unloading of automobile snow chains should be quick and convenient.
4.1.3 The automobile snow chains should not damage the tires during installation, use and removal.
4.1.4 After the car snow chain is installed, the side surface protruding from the inner side of the tire should not be larger than 20mm, and the side surface protruding from the outer side of the tire should not be large
To 25 mm.
4.1.5 After the car snow chain is installed, it should not interfere with the vehicle during driving.
4.2 Performance requirements
4.2.1 Braking performance requirements.
When testing in accordance with 5.2, the MFDDCMFDD of a vehicle snow chain test vehicle installed on a compacted snow straight road is sufficient for vehicle braking
The average deceleration issued, see GB 21670) and the MFDD ratio of the same test vehicle without a car snow chain should be not less than
1.3.
MFDD of an automobile snow chain test vehicle installed on an ice straight road and MFDD of an automobile snow chain-free vehicle installed in the same test vehicle
The ratio should be no less than 1.3.
4.2.2 Traction performance requirements.
When tested in accordance with 5.3, the maximum traction of a vehicle snow chain test vehicle installed on a compacted snow straight road is the same as that of the same test vehicle.
The maximum traction ratio of the automobile snow chains should not be less than 1.2.
4.2.3 Loading requirements.
When testing in accordance with 5.4, the test vehicle equipped with the automobile snow chains shall drive at least 80 km on the specified test road,
Drive at least 20km on icy asphalt or concrete roads.
The test vehicle should be able to start normally on climbing roads. During the test, the tires installed with the car's snow chains should not continuously skid.
The pavement should not be damaged, the car snow chains should not break during the test, and the car snow chains should be complete after the test.
5 Test method
5.1 Test conditions
5.1.1 Environmental conditions.
Test ambient temperature.-15 ° C or less.
5.1.2 Meteorological conditions.
The test should be snow-free and fog-free; the wind speed is not greater than 5 m/s during the test.
5.1.3 Test vehicle.
The test vehicle is a two-wheel drive four-wheel passenger vehicle equipped with ABS system. The vehicle condition should meet the technical requirements of the vehicle. The vehicle load is
Ready quality plus two testers in the front row and necessary test equipment. The test tires should be new ordinary tires (not winter tires).
Set as recommended by the manufacturer. The test vehicle shall drive at least 100 km on dry asphalt or cement road before the test. Coping wheel before test
Clean the tire surface.
The test vehicle shall have a traction function.
5.1.4 Test site
5.1.4.1 Compacted snow straight.
Compacted snow straight thickness is 60
The layer is a medium-heavy compacted snow layer with a thickness of 25 mm to 50 mm (see Appendix B).
5.1.4.2 Straight ice.
Before the start of the Ice Straight, there is at least 300 m of runway with the same width as the ice straight.
A 50 m wide safety zone should have a 10 m wide safety zone on the left and right sides of the entire runway.
5.1.5 Test equipment.
The test instrument should meet the requirements of 3.5 in GB/T 12534, and the MFDD should use an accuracy of ± 1% at the specified test speed.
MFDD can be measured by other methods besides measuring vehicle speed. In this case, the accuracy of its test equipment should be within
Within 3%. The dynamometer accuracy should be ± 1%.
5.2 Braking performance test method
The braking performance test is a test vehicle that repeats a predetermined number of braking test operations (with the effect of ABS) in a short period of time.
The dynamic performance test results are the average of these test data.
The test vehicle was subjected to an emergency braking test with an initial velocity of 30 km/h on the compacted snow straight and ice straight, and the MFDD was recorded.
The peak pedal force should be no more than 500 N when braking on compact snow straight, and the peak pedal force should be no more than 800 N when braking on ice straight.
The pedal force should be kept as constant as possible. The compacted snow straight and ice straight braking tests were performed at least three times each.
The test wheels of the test vehicle were equipped with automobile snow chains, and the above operations were repeated.
Each braking performance test should avoid the previous test tire trajectory. If overlap is unavoidable, the test road surface should be reprocessed.
Note. The peak pedal force of each of the above braking performance tests should be as close as possible.
5.3 Traction performance test method
Traction performance test is a test vehicle that repeats a linear traction test operation a specified number of times in a short period of time. The traction test result is
The average of these test data.
On the compacted snow straight road, the test vehicle and the towed vehicle are connected by a traction rope. The front row of the test vehicle rides 2 occupants (including driving
Driver), one driver in the front row of the towed vehicle. After the test vehicle started, it kept at a speed of 10 km/h ~ 30 km/h and was pulled.
Pull the vehicle slowly until the drive wheels of the test vehicle slip, record the maximum traction during the test, and test at least 3 times.
The drive wheels of the towing vehicle are equipped with a car snow chain, and the above operations are repeated.
Each braking test should avoid the previous test tire trajectory, and if overlap is unavoidable, the test road surface should be reprocessed.
The test quality of the towed vehicle should ensure that the test vehicle can produce the maximum traction force, and the towed vehicle can be made by counterweight if necessary
The test quality meets the requirements.
5.4 Loading test method
The test road should contain at least snow and a little icy pavement (including slopes with a slope of not less than 5%), asphalt-free roads with no snow or ice, or
cement road.
The test vehicle with driving wheels and car snow chains installed shall run at least 80 km on the test road that meets the above requirements.
The driving speed of the test vehicle should be kept at 30km/h as far as possible, and the instantaneous driving speed should not exceed 50 km/h;
Complete the ramp start at least once on the ramp; stop at least once during each type of road driving and check the car's snow chains for damage to the road
Conditions; during driving, avoid emergency braking, rapid acceleration, sharp turns, continuous idling, etc .; observe the test during the test.
If there is any abnormality in the vehicle, if the car's snow chains break, continuous slipping with the tires, or interference with the test vehicle, etc.,
Stop the test.
6 Judgment of the same type
Refers to the same type of snow chains without substantial differences in the following aspects.
-manufacturer;
material
structure.
7 Packaging
Manufacturer name, product name, model, trademark, height of protruding tire tread after installing snow chains, applicable tire specifications should be permanent
Ground to the packaging. There should be a certificate of conformity, product instruction manuals and supporting loading and unloading tools in the package.
...
|