This standard specifies the terminologies and definitions, performance requirements as well as bench test methods of commercial vehicle service brake assembly.
This standard applies to the service brake assembly for Categories M2, M3 and N vehicles specified in GB/T 15089 as well as friction lining (brake block) assembly. The brake assembly for Category O vehicles may also refer to the provisions of this standard.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this standard. For undated references, the latest edition (including any amendments) applies to this standard.
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 Terminologies and Definitions
For the purposes of this standard, the terminologies and definitions specified in GB/T 5620 and the following ones apply.
3.1
Braking period
The time from stating a braking to the next braking in a continuous braking procedure.
Foreword I 1 Scope 2 Normative References 3 Terminologies and Definitions 4 Performance Requirements 5 Relevant Requirements for Test 6 Test Preparation 7 Test Methods and Conditions Appendix A (Normative) Evaluation Method of Braking Torque
1 Scope
This standard specifies the terminologies and definitions, performance requirements as well as bench test methods of commercial vehicle service brake assembly.
This standard applies to the service brake assembly for Categories M2, M3 and N vehicles specified in GB/T 15089 as well as friction lining (brake block) assembly. The brake assembly for Category O vehicles may also refer to the provisions of this standard.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this standard. For undated references, the latest edition (including any amendments) applies to this standard.
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 Terminologies and Definitions
For the purposes of this standard, the terminologies and definitions specified in GB/T 5620 and the following ones apply.
3.1
Braking period
The time from stating a braking to the next braking in a continuous braking procedure.
Contents of QC/T 239-2015
Foreword I
1 Scope
2 Normative References
3 Terminologies and Definitions
4 Performance Requirements
5 Relevant Requirements for Test
6 Test Preparation
7 Test Methods and Conditions
Appendix A (Normative) Evaluation Method of Braking Torque
