Road vehicles - Brake lining friction materials - Drag test method for friction performance
1 Scope
This standard specifies the test equipment, test types, test devices, test steps and result report of friction performance test of brake lining friction materials for road vehicles by drag method.
It is applicable to the friction performance test of brake linings for Categories M, N, O and L vehicles (hereinafter referred to as linings).
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 5620-2002, idt ISO 611:1994)
GB/T 15089 Classification of power-driven vehicles and trailers
JB/T 7498 Coated abrasives - Abrasive paper
QC/T 556 Automotive brake - temperature measurement and thermocouple attachment
3 Terms and definitions
For the purpose of this standard, the terms and definitions specified in GB/T 5620 and GB/T 15089 as well as the following ones apply.
3.1
braking cycle
braking process consisting of several times of braking operations, each of which includes a 5s braking and a 10s idling
3.2
constant pressure mode
control mode to make the pressure of the line constant during the braking process
3.3
constant torque mode
control mode to make the braking torque constant during the braking process
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test equipment
5 Test types and devices
6 Test steps
7 Result report
Road vehicles - Brake lining friction materials - Drag test method for friction performance
1 Scope
This standard specifies the test equipment, test types, test devices, test steps and result report of friction performance test of brake lining friction materials for road vehicles by drag method.
It is applicable to the friction performance test of brake linings for Categories M, N, O and L vehicles (hereinafter referred to as linings).
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 5620-2002, idt ISO 611:1994)
GB/T 15089 Classification of power-driven vehicles and trailers
JB/T 7498 Coated abrasives - Abrasive paper
QC/T 556 Automotive brake - temperature measurement and thermocouple attachment
3 Terms and definitions
For the purpose of this standard, the terms and definitions specified in GB/T 5620 and GB/T 15089 as well as the following ones apply.
3.1
braking cycle
braking process consisting of several times of braking operations, each of which includes a 5s braking and a 10s idling
3.2
constant pressure mode
control mode to make the pressure of the line constant during the braking process
3.3
constant torque mode
control mode to make the braking torque constant during the braking process
Contents of GB/T 34007-2017
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test equipment
5 Test types and devices
6 Test steps
7 Result report
