This standard specifies the terms and definitions, special symbols, specification marks, technical requirements, and test methods for endurance performance of self-supporting run flat tires.
This standard is applicable to the radial tires of new self-supporting air-defense passenger car.
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 4502 Laboratory Test Methods for Passenger Car Tyres Capabilities (GB/T 4502-2009, ISO 10191:1995, MOD)
GB/T 6326 Tyre Terms and Definitions (GB/T 6326-2005, ISO 42234223.1:2002, NEQ)
GB 9743 Passenger Car Tyres
HG/T 2177 Appearance Quality of Tyres
3 Terms and Definitions
For the purpose of this document, the terms and definitions given in GB/T 6326 and the following apply.
3.1
self-supporting run flat tyre
technical solution allowing the pneumatic tyre, mounted on the appropriate wheel and in the absence of any supplementary component, to supply the vehicle with the basic tyre functions at a specified speed and distance when operating in flat tyre running mode
Note: An example of a technical solution is reinforced sidewalls.
3.2
inflate mode
normal working state of a pneumatic tyre, inflated at the cold inflation pressure recommended by the vehicle manufacturer or the tyre manufacturer for the intended service
3.3
loss of tyre functional efficiency
pressure loss of the tyre/wheel assembly which results in operation in flat tyre running mode and which could be rapid, slow or uncontrolled, leading to a reduction of basic tyre function
