This standard specifies the requirements, test method, judgment rules and test report for evaluating impact resistance for passenger car tyres by pendulum method.
This standard is applicable to new series (30 to 65) of tubeless pneumatic passenger car tyres and is not applicable to run-flat tyres and temporary-use spare tyres.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2978 Size designation, dimensions, inflation pressure and load capacity for passenger car tyres
GB/T 3487 Rims for passenger car
GB/T 6326 Tyre terms and definitions
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 30195 Test method for measuring impact performance of motor vehicle tyres
HG/T 2177 Appearance quality of tyres
3 Terms and definitions
For the purpose of this standard, the terms and definitions specified in GB/T 6326 and GB/T 30195 as well as the followings apply.
3.1
striker angle
angle formed by the center plane of the wheel and the intersection line of the center plane of the striker and the curved surface at the front end of the striker, as shown in Figure 1a)
3.2
camber angle; CA
projection of striker angle on a horizontal plane passing through the wheel rotation axis, as shown in Figure 1b)
3.3
slip angle; SA
projection of striker angle on vertical plane passing through the wheel rotation axis, as shown in Figure 1c)
GB/T 38528-2020 The following standards are cited：
