ISO 11486:2006/Amd 1:2012

Overview

ISO 11486:2006/Amd 1:2012 is an important amendment to the international standard that defines methods for setting running resistance on a chassis dynamometer for motorcycles. Developed by ISO Technical Committee ISO/TC 22 (Road vehicles), Subcommittee SC 22 (Motorcycles), this amendment updates ambient conditions parameters critical for accurate and consistent dynamometer testing of motorcycles. By specifying precise environmental factors such as pressure, temperature, and air density, this standard ensures reliable measurement of motorcycle running resistance, which is essential for performance evaluation and regulatory compliance.

Key Topics

• Running Resistance Measurement: Establishes the methodology for determining the resistance motorcycles experience while running on a chassis dynamometer. This simulates real-world driving conditions in a controlled laboratory environment.
• Ambient Conditions Update: Amendment 1 refines the standard ambient conditions for road testing:
  • Pressure (p): 100 kPa
  • Temperature (T): 293 K (20°C)
  • Relative air density (d): 0.9197
  • Air volumetric mass (ρ): 1.189 kg/m³
• Standardization of Testing Conditions: These updated conditions reduce variability in test results by normalizing key atmospheric variables, crucial for accurate inter-laboratory comparisons and regulatory testing.

Applications

ISO 11486:2006/Amd 1:2012 serves as a foundational reference for:

• Motorcycle manufacturers who perform chassis dynamometer testing during vehicle development to optimize performance and fuel efficiency.
• Regulatory bodies requiring standardized testing protocols for emissions and safety certifications.
• Test laboratories conducting repeatable and validated running resistance tests to support product validation and compliance.
• Research and development teams analyzing the effects of aerodynamics, rolling resistance, and drivetrain losses on motorcycle efficiency.

Using this amendment, organizations can ensure that running resistance measurements reflect real-world conditions with improved accuracy, supporting better product design and regulatory adherence.

Related Standards

• ISO 11486:2006 – The original standard detailing methods for setting running resistance on motorcycle chassis dynamometers.
• ISO/TC 22 Road Vehicles series – Covers various aspects of road vehicle testing, including emissions, fuel consumption, and performance metrics.
• ISO/IEC Directives, Part 2 – Governs the drafting rules for international standards, ensuring consistency and reliability across ISO publications.
• Motorcycle emission and safety standards – Often reference running resistance measurements in performance and compliance testing frameworks.

By implementing ISO 11486:2006/Amd 1:2012, stakeholders in the motorcycle industry can achieve consistent and internationally recognized test results, facilitating improved product quality, compliance, and competitive advantage. This enhancement to running resistance measurement standards supports ongoing innovation and environmental responsibility within the motorcycle sector.