This standard specifies the performance requirements and test methods of tire pressure monitoring system for passenger cars.
This standard is applicable to Category M1 vehicles.
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 normative document (including any amendments) applies.
GB/T 12534 Motor vehicles - General rules of road test method
ECE R10 Uniform provisions concerning the approval of vehicles with regard to electromagnetic compatibility
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
tire pressure monitoring system; TPMS
a system installed on a vehicle that monitors tire pressure in some way and gives alarm when one or more tires are under inflation
3.2
recommended cold tire pressure; Prec
tire pressure value recommended by the vehicle manufacturer for the tire at each position for the predetermined operating conditions of the vehicle (e.g. load, vehicle speed, etc.) at ambient temperature, without accumulation of pressure due to use
Note: Prec is generally is indicated in the vehicle user manual or on the driving cab door (B-pillar), fuel tank cap, storage box, etc.
3.3
under inflation
the condition that the tire pressure is less than or equal to 75% of the recommended cold tire pressure (Prec)
