QC/T 592-2025 English PDF - Brake Caliper Assembly: Performance & Tests
Performance requirements and bench test methods for automobile hydraulic brake caliper assembly
Standard Details
QC/T 592-2025 (English Version)
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QC/T 592-2025 (Chinese Version)
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Standard Introduction
This document standardizes the performance requirements and test-related requirements for hydraulic brake caliper assemblies used in service brakes of automobiles (hereinafter referred to as "brake caliper assemblies"), and specifies the bench test methods.
This document applies to hydraulic brake caliper assemblies for service brakes of N1 category vehicles as specified in GB/T 15089 and M category vehicles with a maximum design total mass not exceeding 3500 kg. Hydraulic brake caliper assemblies of other categories may refer to this document for implementation.
Standard Catalog
The standard consists of the following main sections:
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Performance Requirements
4.1 Vacuum Tightness
4.2 Low-pressure Tightness
4.3 High-pressure Tightness
4.4 Vent Port Tightness
4.5 Fluid Inlet Port Tightness
4.6 Required Fluid Volume
4.7 Drag Torque
4.8 Caliper Body Rigidity
4.9 Piston Return Stroke
4.10 Piston Sliding Resistance
4.11 Piston Activation Pressure
4.12 Caliper Body Sliding Resistance
4.13 Brake Pad Sliding Resistance
4.14 Strength
4.15 Durability
4.16 Waterproof Performance
4.17 Corrosion Resistance
5 Test-related Requirements
5.1 Test Equipment Requirements
5.2 Test Sample Requirements
6 Test Methods
6.1 Vacuum Tightness
6.2 Low-pressure Tightness
6.3 High-pressure Tightness
6.4 Vent Port Tightness
6.5 Fluid Inlet Port Tightness
6.6 Required Fluid Volume
6.7 Drag Torque
6.8 Caliper Body Rigidity
6.9 Piston Return Stroke
6.10 Piston Sliding Resistance
6.11 Piston Activation Pressure
6.12 Caliper Body Sliding Resistance
6.13 Brake Pad Sliding Resistance
6.14 Strength
6.15 Durability
6.16 Waterproof Performance
6.17 Corrosion Resistance
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