1 Scope
This standard specifies test conditions, test methods, accuracy of test parameters, determination of centre of gravity, record and format of test results for determination of centre of gravity of road vehicles with two axles.
This standard is applicable to determination of centre of gravity for road vehicles with two axles, and determination of other vehicles may refer to it.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending error in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the documents is applicable. For undated references, the latest edition of the normative document applies.
GB/T 12673 "Motor Vehicles-Basic Dimensions-Measuring Method"
GB/T 12674 "Motor Vehicles-Weight Parameter-Measuring Method"
3 Test Conditions
3.1 Liquid
Oil tank shall be filled up. In the test for height of centre of gravity, the vehicle inclination leads to liquid moving. The liquid influence shall be considered and counted in.
3.2 Load conditions, hanger bracket and machinery parts
After the specified load for vehicle is met (curb weight state if no special requirement specification), all loads shall be fixed on their positions to avoid vehicle displacement caused by declination. Vehicle hanger bracket shall be deadly locked to avoid the vehicle deformation state change caused by declination. Other spare parts flexibly mounted on vehicle shall all be deadly locked to avoid affecting test result.
When raising vehicle to test, put in neutral gear and loosen hand brake; for rolling of wheel, only adopt sprag or other methods to prevent the wheel from rolling. Maintain the front wheel in direct movement state as much as possible.
Foreword I
1 Scope
2 Normative Reference
3 Test Condition
4 Test Methods
5 Accuracy of Test Parameter
6 Determination of Centre of Gravity
7 Record Format
Appendix A (Normative) Determination of Wheel Static Radius rstat1
Appendix B (Normative) Test Report
