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GB/T 12541-1990 English PDF (GBT12541-1990)

GB/T 12541-1990 English PDF (GBT12541-1990)

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GB/T 12541-1990: Motor vehicles - Passing topography capacity - Test method

This Standard specifies test method of passing topography capacity of motor vehicles. This Standard is applicable to cross-country vehicle. Other motor vehicles may refer to this Standard.
GB/T 12541-1990
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
UDC 629.113/.115.001.4
T 04
GB/T 12541-90
Replacing GB 1334-77
Motor Vehicles -
Passing Topography Capacity - Test Method
ISSUED ON. DECEMBER 12, 1990
IMPLEMENTED ON. SEPTEMBER 01, 1999
Issued by. State Bureau of Technical Supervision
Table of Contents
1 Subject??Content??and??Application??Scope??...??3
2 Normative??References??...??3
3 Term??...??3
4 Test??Conditions??...??3
5 Preparation??of??Test??Vehicles??...??4
6 Test??Methods??...??4
7 Test??report??...??5
Appendix??A??...??6
Appendix??B??...??7
Additional??Explanation.??...??9
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 12541-90
Motor Vehicles -
Passing Topography Capacity - Test Method
1 Subject??Content??and??Application??Scope
This Standard specifies test method of passing topography capacity of motor vehicles. This Standard is applicable to cross-country vehicle. Other motor vehicles may refer to this Standard.
2 Normative??References
GB/T 12534 Motor Vehicles - General Rules of Road Test Method
3 Term
3.1 Passing topography capacity of motor vehicles
It refers to the capacity of motor vehicles to pass some topographies (such as vertical obstacle, convex hills, level ditch, road ditch, shell hole, and wading pool etc.). 4 Test??Conditions
4.1 General test conditions shall meet the requirements of GB/T 12534.
4.2 Test instruments and equipment
a. Remote thermometer;
b. Tape (or steel tape);
c. Stopwatch;
d. Camera;
6.6 Test of passing road ditch
Drive the vehicle at a low speed according to the gear used in Article 6.2. The test vehicle shall drive in 45??-angle and 90??-angle to the road ditch, when passing the road ditch. After the test, inspect whether each component and connecting piece of motor vehicles are loose; judge whether the working condition of each assembly is normal. 6.7 Test of passing shell hole
Drive the vehicle over shell hole at a low speed according to the gear used in Article 6.2.
6.8 Wading test
Inspect and adjust the technical conditions of the motor vehicles according to technical requirements for the wading of the vehicles.
In an artificial wading pool, the motor vehicle drives with all-wheels and over the pool of which the water depth meets the design specification requirements. Determine the passing time and engine outlet temperature, machine oil temperature; and observe the water inflow and sealing conditions of cabs; perform 1 test of to-and-fro trip; use camera to record the passing condition.
After the test is completed, immediately stop the vehicle and shut off the engine; inspect the sealing condition after wading; after 5~15 min, restart the vehicles, and observe whether the various components work normally.
6.9 Test results shall be filled into all the tables listed in Appendix B (supplementary). 7 Test??report
Test report shall usually include the following contents.
a. Test purposes;
b. Test contents;
c. Test topography facilities description or structure and schematic diagram; d. Test results and assessment;
e. Test execution organization, participator and reporter;
f. Reporting date.
Table B5 Test of Passing Shell Hole mm
Test number Shell hole dimension Passing condition Remark
Table B6 Wading Performance Test
Test number
Test direction
Initial thermal conditions ??
Engine water temperature
Engine oil temperature
Ending thermal
conditions ??
Engine water temperature
Engine oil temperature
Starting time
Ending time
Passing time
Passing distance, km
Components?€? working condition before wading
Components?€? working condition after wading (starter, clutch, electric
accessories and braking system)
Seal condition after wading (cab, drive axle, transfer case, and front- and back-wheel hub)
Remark
Additional??Explanation.
This Standard was proposed by China Automobile Industry Corporation.
This Standard shall be under the jurisdiction of the National Technical Committee on Road Vehicles of Standardization Administration of China.
This Standard is responsibly drafted by the automotive test field of the General Logistics Department of PLA.
Chief Drafting Staff of this Standard. Wu Ke.

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