1 Scope
1.1 This standard specifies the terms and definitions, performance requirements, test requirements, test preparation and test methods of passenger car service brake assembly.
1.2 This standard is applicable to the service brake assembly and friction lining (pad) assembly for Category M1 vehicles specified in GB/T 15089.
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 5620 Road vehicles - Braking of automotive vehicles and their trailers - Vocabulary
GB/T 15089 Classification of power-driven vehicles and trailers
QC/T 556 Automotive brake - Temperature measurement and thermocouple attachment
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 5620 and the following apply.
3.1
braking period
period from the beginning of a braking to that of the next braking in a continuous braking process
Note: the braking period is in the unit of s.
3.2
initial braking temperature
temperature of brake drum (disc) or friction lining (pad) at the beginning of braking
Note: the initial braking temperature is in the unit of ℃.
3.3
average braking torque
ordinate value obtained by dividing the area enclosed by braking torque and effective braking time by the effective braking time during a braking, see Annex A
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Performance requirements
5 Test requirements
6 Test preparation
7 Test methods
Annex A (Normative) Evaluation method of braking torque
1 Scope
1.1 This standard specifies the terms and definitions, performance requirements, test requirements, test preparation and test methods of passenger car service brake assembly.
1.2 This standard is applicable to the service brake assembly and friction lining (pad) assembly for Category M1 vehicles specified in GB/T 15089.
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 5620 Road vehicles - Braking of automotive vehicles and their trailers - Vocabulary
GB/T 15089 Classification of power-driven vehicles and trailers
QC/T 556 Automotive brake - Temperature measurement and thermocouple attachment
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 5620 and the following apply.
3.1
braking period
period from the beginning of a braking to that of the next braking in a continuous braking process
Note: the braking period is in the unit of s.
3.2
initial braking temperature
temperature of brake drum (disc) or friction lining (pad) at the beginning of braking
Note: the initial braking temperature is in the unit of ℃.
3.3
average braking torque
ordinate value obtained by dividing the area enclosed by braking torque and effective braking time by the effective braking time during a braking, see Annex A
Contents of QC/T 564-2018
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Performance requirements
5 Test requirements
6 Test preparation
7 Test methods
Annex A (Normative) Evaluation method of braking torque
