ISO 12364:2001

Overview

ISO 12364:2001 - Two-wheeled motorcycles - Antilock braking systems (ABS) - Tests and measurement methods defines uniform test procedures and measurement methods for evaluating antilock braking systems (ABS) on solo motorcycles (L3 category as per ISO 3833). The standard focuses on straight-line braking performance and sets out repeatable procedures for determining adhesion utilization, wheel-lock behavior, ABS-failure responses and complementary tests to aid development and assessment.

Keywords: ISO 12364:2001, motorcycle ABS tests, antilock braking systems, adhesion utilization, wheel-lock check, braking test methods

Key topics and technical requirements

• Scope and test types

  • Utilization-of-adhesion test (determines how well ABS uses available grip)
  • Wheel-lock check test (verifies wheel-lock behavior, unladen)
  • Tests with ABS failed (electronically controlled systems)
  • Complementary tests for development and assessment

• Test site and environmental limits

  • Two reference surfaces: coefficient of adhesion ≤ 0.45 and ≥ 0.80
  • Surface gradient ≤ 1 %; water depth on wetted surfaces ≤ 3 mm
  • Average wind speed ≤ 5 m/s
  • Test lane of sufficient length/width and flat surrounding area

• Motorcycle preparation and instrumentation

  • Tyres inflated to manufacturer’s recommended pressures
  • Rider + test equipment mass minimum 85 kg; instrumentation mass should not exceed 10 % of unladen mass
  • Brake temperature on discs/drums should be ≤ 100 °C before each stop
  • ABS must be disabled for coefficient-of-adhesion determination
  • Required instrumentation: wheel-speed sensors, speedometer/third wheel, multi-channel recorder (bandwidth ≥ ABS cycling frequency), control force or brake-fluid pressure sensors; outriggers optional for safety

• Test execution and calculations

  • Test speeds: typical reference 60 km/h (or 0.9·vmax for lower-speed motorcycles); ±5 km/h tolerance
  • Control forces applied rapidly (recommended 0.2–0.5 s to reach target); force references from ISO 8710: [200 N] hand, [350 N] foot
  • Adhesion utilization (e) and coefficient of adhesion (k) derived from measured braking rate
  • Braking rate z example: z = 0.56 / t, where t = time to decelerate from 40 km/h to 20 km/h

• Reporting

  • Detailed test report required (speeds, forces, ambient conditions, vehicle/ABS ID, tyre data, results, deviations). Annex A provides an example report format.

Applications and users

• Who uses ISO 12364:2001

  • Motorcycle manufacturers and ABS system suppliers for validation and design
  • Test laboratories and certification bodies performing braking performance assessments
  • Regulatory and homologation authorities referencing standardized test methods
  • R&D teams optimizing ABS control algorithms and vehicle braking balance

• Practical value

  • Ensures repeatable, comparable ABS performance data across sites and manufacturers
  • Supports safety validation, compliance testing and development benchmarking
  • Helps quantify how effectively ABS exploits road adhesion under controlled conditions

Related standards

• ISO 3833 (vehicle classification definitions)
• ISO 6726 (masses - vocabulary)
• ISO 7117 (measurement of maximum speed)
• ISO 8710 (motorcycle brakes - tests and measurement methods)

ISO 12364:2001 provides a practical, standardized framework for assessing motorcycle ABS performance - essential for manufacturers, test houses and regulators involved in motorcycle safety and braking system development.