ISO 6460-2:2014

Overview

ISO 6460-2:2014 - Motorcycles - Measurement method for gaseous exhaust emissions and fuel consumption - Part 2: Test cycles and specific test conditions - defines standardized test cycles and specific test conditions for measuring gaseous exhaust emissions and fuel consumption of motorcycles (as defined in ISO 3833). It applies to motorcycles with spark‑ignition engines (four‑stroke, two‑stroke, rotary piston) and compression‑ignition engines. Test Cycle 1 corresponds to the EU Directive 2003/77/EC (UDC/EUDC) and Test Cycle 2 corresponds to the Global Technical Regulation No.2 (WMTC). Annex C describes other nationally adopted cycles for information.

Key topics and technical requirements

• Defined test cycles: Urban Driving Cycle (UDC) and Extra‑Urban Driving Cycle (EUDC) sequences for chassis dynamometer testing; distinctions for motorcycles <150 cm3 (six urban cycles) and ≥150 cm3 (six urban + one extra‑urban).
• Chassis dynamometer procedures: operating cycle descriptions, speed/time profiles, and cycle breakdowns for UDC and EUDC.
• Control tolerances: typical tolerances such as ±2 km/h speed and ±0.5 s timing for phases (with combined tolerance rules referenced).
• Gear usage and shifting rules: procedures for manual, semi‑automatic, and automatic gearboxes during accelerations, constant speed and decelerations; guidance on highest gear for constant‑speed tests.
• Start, idle and acceleration procedures: specified startup/sample start, choke management, idling durations (e.g., initial idling sequence and intermediate idling periods) and requirements for steady accelerations/decelerations.
• Environmental and test room conditions: e.g., ambient temperature guidance for the dynamometer room (about 293 K–303 K) and motorcycle leveling to avoid fuel distribution anomalies.
• Sampling and analysis: diluted exhaust sampling into bags for determination of CO, hydrocarbons, NOx, CO2; bag analysis required as soon as possible and no later than 20 minutes after end of test cycle.
• Presentation and classification: sections cover classification of results, test procedures, and formats for presenting emissions and fuel consumption data.

Practical applications and who uses this standard

• Vehicle manufacturers and powertrain engineers for type‑approval testing and design validation.
• Accredited test laboratories and certification bodies performing homologation and compliance testing.
• Regulatory agencies aligning national emissions limits with EU or WMTC procedures.
• R&D teams and emissions researchers comparing real‑world and standardized performance. Practical outcomes include consistent emissions/fuel consumption reporting, comparability across jurisdictions, and repeatable lab testing on chassis dynamometers.

Related standards

• ISO 6460-1 - Motorcycles - Measurement method - Part 1: General test requirements
• ISO 4106 - Motorcycles - Engine test code - Net power
• ISO 7117 - Motorcycles - Method for determining maximum speed
• EU Commission Directive 2003/77/EC (UDC) and UN GTR No.2 / WMTC (EUDC)

Keywords: ISO 6460-2:2014, motorcycle emissions test cycles, UDC, EUDC, WMTC, chassis dynamometer, gaseous exhaust emissions, fuel consumption testing, ISO motorcycle standards.