Overview - ISO 7635:2006 (Road vehicle braking systems test procedures)
ISO 7635:2006 defines standardized test procedures for air and air-over-hydraulic braking systems of road vehicles (categories M and N, excluding M1 and N1). It covers systems that include electronic control functions (for example EBS/ABS) and is aligned with UN‑ECE Regulation No. 13 (09 series, supplements 1–6). This third edition (2006) specifies how to prepare vehicles, set up test sites, and execute reproducible tests for type approval, certification and performance verification. Note: test methods for lock actuators and electrical regenerative braking on electric/hybrid vehicles are excluded from this edition.
Key topics and technical requirements
The standard organizes required test work and checks into clear sections addressing:
- Test site and ambient conditions: requirements for test surface, environmental conditions and instrumentation to ensure repeatable results.
- Vehicle preparation: documentation, tyre and bedding conditions, brake adjustments and instrumentation.
- Static tests and checks: static braking force vs. line pressure, energy source capacity, response-time measurements, brake-failure and warning signals.
- Sequence of tests: recommended order from static checks through unladen and laden dynamic tests, failure simulations and ABS/EBS evaluations.
- Basic performance tests: Type 0 (service brake effectiveness with engine disconnected/connected), parking/hill‑holding, secondary braking.
- Endurance and fade tests: Type I (fade) and Type II/IIA (downhill/endurance) procedures for thermal and performance stability.
- Failure and safety tests: partial failure, failed load-sensing devices, energy-source failure (separately for laden/unladen conditions).
- ABS/EBS specific tests: split-adhesion, peak adhesion measurement, adhesion utilization, energy consumption checks and ABS failure behavior.
- Definitions and diagrams: terms for air, air-over-hydraulic and electronic braking systems; typical system diagrams in annex.
Practical applications and users
ISO 7635 is used by:
- Vehicle manufacturers and braking system suppliers for product development and type approval testing.
- Independent test laboratories and certification bodies conducting homologation to UN‑ECE R13.
- Regulatory compliance teams, safety engineers and OEM validation groups verifying braking performance under standard conditions.
Benefits include consistent, reproducible braking systems test procedures, harmonized with international regulatory requirements and useful for documenting compliance and safety claims.
Related standards
Key normative references and related documents cited in ISO 7635:2006 include:
Keywords: ISO 7635, braking systems test procedures, air braking, air-over-hydraulic, ABS tests, EBS, UN‑ECE R13, vehicle type approval.
Open preview (PDF)Road vehicles — Air and air/hydraulic braking systems of motor vehicles, including those with electronic control functions — Test procedures