T/CSAE 80-2018 in English

Analysis of the core content of the standard

This standard establishes an endurance test system including 820,000 comprehensive cycles for the special working conditions of the energy regenerative automobile hydraulic anti-lock braking system (EABS). The main technological breakthroughs are reflected in:

Details of key technical requirements

4.2.1 Sealing requirements

The standard specifies 6 types of sealing indicators, among which the pressure drop of high-pressure sealing is required to be ≤0.7MPa, and the pressure drop of vacuum sealing is required to be ≤0.15×10⁻⁶MPa. The test needs to be performed after completing all endurance tests to verify the reliability of the hydraulic control unit (HCU) under extreme working conditions.

4.2.2 Dynamic performance

Special provisions for pressure switching test:

• Front wheel output port pressure ≤ 0.02MPa
• Rear wheel and Medium pressure accumulator (MPA) interface pressure must be maintained at 6±0.3MPa
• Front wheel flow rate > 2.7mL/s when the pressure regulating valve is opened

Innovation in test method

6.4 Durability performance test

A five temperature ranges composite test scheme is adopted:

1. High temperature test: 100-120℃ to verify the thermal stability of the material
2. Low temperature test: -30~-40℃ to test the performance of the seal
3. Cycle I/II differentiated design: 3MPa and 8MPa dual-mode verification

6.3 Working noise test

In an environment with background noise <40dB, measure the sound pressure level at 700mm from the sample, with a limit of 76dB. The actual vehicle installation state (including vibration damping pads) needs to be simulated.

Implementation suggestions

1. Equipment selection: The pressure source needs to cover the range of 0-16MPa, and the control accuracy should be ≥98%.
2. Test sequence: It is recommended to perform in the order of sealing → dynamic performance → noise → durability
3. Data analysis: Focus on the performance inflection point at the 80,000th cycle